Signaling by FGFR2 (Homo sapiens)

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2, 19, 32, 38, 44...12412471, 72, 81, 10334, 498, 19129876, 54, 58, 75, 76, 82...17, 45, 54, 56, 75...42, 626871, 103, 14323, 43, 50, 59, 74...21, 109, 114, 121, 1561212437, 11775, 15383, 951, 11523, 43, 50, 74, 75, 95...4, 23, 43, 50, 52...11, 228, 77, 106, 1231, 96, 11539, 1563, 8, 24, 37, 1128, 194, 9, 52, 143, 149...958689, 122, 13613, 6813, 115, 14017, 45, 54, 56, 75...50, 5310, 16, 61, 78, 893, 26, 7736, 90, 117, 147754, 52, 56, 65, 959, 50, 53, 59, 64...20, 25, 33, 47, 97...43, 106, 14312411, 22, 65, 99, 119...43, 12337, 112, 12354, 75, 76, 82, 107...8, 37, 43, 123122, 1368, 194, 28, 50, 56, 95...4, 9, 29, 52, 56...3, 26, 67, 7786, 11886, 1207, 42, 9620, 25, 47, 54, 57...15210, 16, 61, 78, 8914, 40, 60, 6351, 100, 128, 1383, 67, 77, 1021299, 50, 53, 59, 64...Golgi lumencytosolActivatedFGFR2:p-FRS2:p-PTPN11FGF1 p-T,Y MAPK dimersADPFGFR2c-binding FGFs ActivatedFGFR2:p-FRS2:GRB2:GAB1:PIK3R1FGF18 UBC(229-304) p-Y55,Y227-SPRY2 FGFR2 point mutantdimersActivated FGFR2c homodimer bound to FGF p-6Y-FRS2 UBC(457-532) UBC(609-684) UBC(305-380) p-8Y-FGFR2b P253R FGF2(10-155) Activated FGFR2mutants:p-FRS2p-8Y-FGFR2c A315S mutant p-Y371-CBL:GRB2GAB1 FGF23(25-251) FGF6 RAF/MAP kinasecascadep-8Y-FGFR2c S372C BRAF SOS1 FGFR2b-binding FGFs FGF10 FGFR2 W290C Activated FGFR2c homodimer bound to FGF IL17RD-1p-8Y-FGFR2b P253R UBC(153-228) FGFR2c-binding FGFs Activated FGFR2 mutants with enhanced kinase activity FGF10 p21 RAS:GTPUBC(457-532) p-8Y-FGFR2c S252W Activated FGFR2bmutants withenhanced ligandbindingFGFR2 N549H UBA52(1-76) FP-1039E7080 GTPGRB2-1 ActivatedFGFR2:p-FRS:p-PTPN11FGF22 FGF2(10-155) UBB(1-76) ActivatedFGFR2:p-8T-FRS2p-Y546,Y584-PTPN11 FGFR2c short UBC(77-152) FGF17-1 p-8Y-FGFR2c S252W FGFR2b S252W FGF9 p-8Y-FGFR2c P253R p-Y371-CBL FGFR2c A314S UBC(229-304) UBC(77-152) HS p-Y371-CBL FGFR2b P253R FGF6 ActivatedFGFR2:p-FRSFGFR2b-binding FGFs p-8Y-FGFR2c Y375C ATPActivated FGFR2b homodimer bound to FGF UBB(77-152) FGF2(10-155) SHC1-3 PPP2CB UBC(457-532) FGFR2bFGF18 p21 RAS:GDPFGF9 FRS2Activated FGFR2c homodimer bound to FGF p-8Y-FGFR2 N549K FGFR2 K660M HS FGF10 p-6Y-FRS2 FGFR2 K660N p-8Y-FGFR2c A315T Activated FGFR2mutants:FRS2p-T185,Y187-MAPK1 Activated FGFR2c homodimer bound to FGF UBB(77-152) PPP2CA UBC(381-456) FGFR2c long Activated overexpressed FGFR2 dimers ActivatedFGFR2:p-FRS:PTPN11FGFR2 FGFR2c A314D p-8Y-FGFR2b P253R p-S218,S222-MAP2K1 FGFR2b-binding FGFs UBC(229-304) FGF1 Activated FGFR2b homodimer bound to FGF HS p-8Y-FGFR2c P253R p-S,T-MAP2K2 p-8Y-FGFR2c A314S p-8Y-FGFR2c A315S mutant p-8Y-FGFR2b S252W PPP2CB FGFR2 S267P PIK3R1 FGFR2c S252W PLCG1 p-8Y-FGFR2c S252W PTPN11 PPP2CB Phosphorylated Fibroblast growth factor receptor 2b short GRB2-1 FGF6 p-8Y-FGFR2-5 ActivatedFGFR2mutants:p-FRS2:GRB2:GAB1:PIK3R1FGF2(10-155) PLCG1FGF7 ATPp-4Y-PLCG1 PPP2R1A FGF4 UBC(77-152) FGFR2c-binding FGFs FGF5-1 GRB2-1 Y55/Y227-pSPRY2:CBLFGF6 PI(3,4,5)P3GRB2-1 FGF2(10-155) Activated FGFR2 mutants with enhanced kinase activity ATPHS FGF7 UBC(305-380) SHC1 p46,p52HS Tyrosine kinaseinhibitors of FGFR2mutantsFGF2(10-155) FGFR2c A315S p-Y546,Y584-PTPN11 HS ActivatedFGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PIK3R1FGF6 FGF6 FGFR2bmutant-binding FGFsp-Y546,Y584-PTPN11 FGFR2c A315T UBB(153-228) Activated FGFR2 ligand-independent mutants MAPK3 FGFR2c-binding FGFsFGFR2b long p-8Y-FGFR2c S252W RPS27A(1-76) Activated FGFR2c homodimer bound to FGF p-8Y-FGFR2b S252W p-8Y-FGFR2b S252W ATPp-8Y-FGFR2c A315S mutant ATPActivated FGFR2 ligand-independent mutants GRB2-1PPA2A(A:C):S112/S115p-SPRY2Activated FGFR2b homodimer bound to FGF p-5Y-FRS3 p-8Y-FGFR2c A314D UBC(1-76) BGJ398 FGF22 Activated FGFR2b homodimer bound to FGF FGF7 GP369FGFR2c-binding FGFs RPS27A(1-76) E7080 Activated overexpressed FGFR2 dimers FGF10 Activated FGFR2b homodimer bound to FGF FGFR2cUBC(1-76) Activated FGFR2mutantsUBC(381-456) Activated FGFR2bhomodimer bound toFGFActivated FGFR2b homodimer bound to FGF FGF10 Activated FGFR2c homodimer bound to FGF p-S222,S226-MAP2K2 p-8Y-FGFR2c A314S p-8Y-FGFR2b S252W UBC(533-608) FGFR2b S252W FGF7 FGFR2c-binding FGFs Activated FGFR2SU5402 p-8Y-FGFR2c A315T p-5Y-FRS3 FGFR2c-binding FGFs FGFR2c P253R p-8Y-FGFR2c A315S mutant FGF2(10-155) PPP2CB FGF7 ATPp-8Y-FGFR2c A314S ADPADPFGF6 FGF7 FGF2(10-155) FGF5-1 FGFR2 mutant dimerswith enhancedkinase activityFGFR2b P253R Activated FGFR2:SHC1FGF7 FGFR2c mutantbinding FGFsUBC(457-532) p-5Y-FRS3 ActivatedFGFR2:p-FRS3FGF7 Activated FGFR2b homodimer bound to FGF FGFR2bmutant-bindingFGFs:FP-1039RPS27A(1-76) p-S112,S121-SPRY2 GRB2:GAB1p-8Y-FGFR2c P253R FGFR2 FGFR2c A315T FGFR2 L764fs*4 FGF10 PPA2A (A:C):Y55/Y227p-SPRY2:GRB2PI(3,4,5)P3FGFR2b C3 variant p-Y55,Y227-SPRY2 Activated FGFR2 ligand-independent mutants Activated FGFR2b homodimer bound to FGF p-6Y-FRS2 UBC(1-76) FGF5-1 p-8Y-FGFR2c P253R FGFR2 K660N activatedFGFR2:p-4Y-PLCG1UbUBC(305-380) UBC(77-152) PIK3R1 FGF6 SPRY2:B-RAFPI(4,5)P2FGF1 FGF8-1 Activated FGFR2b homodimer bound to FGF RPS27A(1-76) FGF7 AZ 2171 p-8Y-FGFR2c A315T p-8Y-FGFR2c A315T PPP2CB FGFBP3 UBB(153-228) PP2A (A:C)ActivatedFGFR2:pY-SHC1:GRB2:SOS1FGFBP1 FGFR2c mutant dimerswith enhancedligand-bindingbound to FGFsFGF10 p-5Y-FRS3 SPRY2 Ub-Activated FGFR2complex:Ub-p-FRS2FGF7 FRS3 PPP2CB p-6Y-FRS2 FGF9 UBC(533-608) Activated FGFR2b homodimer bound to FGF p-T202,Y204-MAPK3 UBC(381-456) HS p-S111,S120-SPRY2 FGFR2b mutants withenhanced ligandbindingATPActivated overexpressed FGFR2 dimers UBB(153-228) AZD4547 Activated FGFR2 mutants with enhanced kinase activity ATPFGF6 FGF6 Activated FGFR2c homodimer bound to FGF Activated FGFR2mutants withenhanced kinaseactivityFGF6 p-8Y-FGFR2b S252W PPP2CB FGF10 p-6Y-FRS2 p-T202,Y204-MAPK3 FGF6 UBB(77-152) UBC(609-684) p-S218,S222-MAP2K1 Activated FGFR2 ligand-independent mutants ActivatedFGFR2:p-FRS:GRB2:SOS1p-8Y-FGFR2c A315S mutant FGF10 FGF3 FGFR2b C3 variant FGF20 Activated FGFR2 mutants with enhanced kinase activity GAB1 UBC(305-380) GRB2-1 SOS1 FGFR2c-binding FGFs KRAS FGF1 PIK3CAFGF7 RPS27A(1-76) p-Y546,Y584-PTPN11 UBB(153-228) p-8Y-FGFR2b S252W FGFR2c Y375C ATPFGF4 HSPPP2R1A p-8Y-FGFR2c A315T HS FGF23(25-251) UBC(305-380) ADPFGF7 ActivatedFGFR2mutants:p-FRS2:GRB2:GAB1:PI3KGRB2-1:SOS1HS CBL Activated FGFR2c homodimer bound to FGF GRB2-1 p-8Y-FGFR2c A314S FGFR2b S252W Activated FGFR2chomodimer bound toFGFFGF6 FGFR2c-binding FGFs Activated overexpressed FGFR2 dimers FGFBP1 PP2A(A:C):SPRY2FGFR2b C3 variant FGF2(10-155) FGF2(10-155) FGFR2b P253R FGF4 SU5402 PPP2CA Overexpressed FGFR2homodimersE3810 p-8Y-FGFR2b P253R FGF7 FGF16 UBB(1-76) FGFR2c A314S FGFR2c S372C Activated FGFR2c homodimer bound to FGF FGFR2c P253R GAB1 FGF9 FGF17-1 p-5Y-FRS3 FGFR2b S373C p-S,T-MAP2K2 FGF22 PD173074 PIK3CA ActivatedFGFR2:p-FRS2:p-PTPN11:p-CBL:GRB2ADPHS Activated FGFR2c homodimer bound to FGF FGFR2 K660E PPP2CA Activated overexpressed FGFR2 dimers FGFBP:FGFFGFR2 p-8Y-FGFR2c P253R p-6Y-FRS2 p-6Y-FRS2 p-8Y-FGFR2c S252W ADPp-8Y-FGFR2c P253R p-8Y-FGFR2b S373C ADPPIK3R1 Activated FGFR2b homodimer bound to FGF FGFR2 K660M p-8Y-FGFR2 S267P FGFR2c A314S Activated FGFR2b homodimer bound to FGF FGF10 HS ADPFGF1 FGF9 FGFR2c A314D PLCG1 UbUBC(1-76) Activated FGFR2b homodimer bound to FGF p-MEK:p-ERKp-Y546,Y584-PTPN11 PIP3 activates AKTsignalingUBC(457-532) FGFR2c A315S Activated FGFR2 mutants with enhanced kinase activity HRAS FGFR2 K660E FGF23(25-251) FGF9 p-6Y-FRS2 SOS1 FGF3 p-S111,S120-SPRY2FGF10 FGF6 Activated FGFR2 mutants with enhanced kinase activity FGFR2 mutant dimers with enhanced kinase activity FGF2(10-155) PPP2R1A ATPFGF10 S111/S120p-SPRY2:B-RAFUBC(533-608) FGFR2c S252W FGFR2b-binding FGFs Overexpressed FGFR2PIK3CA Activated FGFR2c homodimer bound to FGF FGF1 FGFR2 N549K PPA2A(A:C):SPRY2DAG and IP3signalingADPFGF10 p-8Y-FGFR2c A314S FGFR2c P253R PPP2CA FGFR2c S372C FGF10 FRS3PPP2R1A UBC(609-684) FGFR2b S252W GRB2-1 Activated FGFR2b homodimer bound to FGF UBC(153-228) SPRY2 Activated FGFR2c homodimer bound to FGF phosphorylated FGFR2 L764fs*4 E3810 PIK3R1 FGFR2c-binding FGFs p-8Y-FGFR2c A315T ATPFGF22 FGF9 FGFR2ligand-independentmutantsp-Y546,Y584-PTPN11 UBB(1-76) p-4Y-PLCG1 Tyrosine kinaseinhibitors ofoverexpressed FGFR2UBB(77-152) ActivatedFGFR2:p-FRS2Activated FGFR2c homodimer bound to FGF FGF7 Activated FGFR2b homodimer bound to FGF FGFR2c-binding FGFs FGFR2b S373C p-Y239,Y240,Y317-SHC1-2 GP369 p-8Y-FGFR2c S252W UBA52(1-76) Activated FGFR2mutants:PLCG1Activated FGFR2 ligand-independent mutants HS SOS1 p-8Y-FGFR2b P253R FGFR2b-binding FGFs HS CBL UBA52(1-76) HS ATPADPp-T,Y MAPKsFGF6 UBC(229-304) KRAS FGFR2c A315T p-8Y-FGFR2c A315S mutant FGFR2b-binding FGFs FGFR2 ligand-independent mutant dimers Activated overexpressed FGFR2 dimers FGFR2 ligand-independent mutant dimers ATPUb:Y55/Y227-pSPRY2:CBLPD173074 p-8T-FRS2 FGFR2c-binding FGFs FGFR2b-binding FGFs Activated FGFR2c homodimer bound to FGF p-8Y-FGFR2c A314D FGF9 FGF8-1 FGFR2c mutants withenhanced ligandbindingFGF2(10-155) p-8Y-FGFR2c A314D ADPActivatedoverexpressed FGFR2dimersFGF18 FGF10 UBB(1-76) FGFR2c S252W Activated FGFR2c homodimer bound to FGF PiPPP2CA ATPFGFR2 L764fs*4 p-8Y-FGFR2b P253R p-8Y-FGFR2b S252W FGF17-1 FGF7 FGF16 ADPp-S112,S115-SPRY2 p-8Y-FGFR2c A315T GAB1 GRB2-1 FGF2(10-155) Activated overexpressed FGFR2 dimers p-6Y-FRS2 FGF9 GTP FGF6 UBA52(1-76) p-8Y-FGFR2b P253R p-6Y-FRS2 p-8Y-FGFR2b P253R p-4Y-PLCG1Activated FGFR2b homodimer bound to FGF FGFBP3 FGF20 FGFR2c W290G FGFR2b Y376C FGFR2c W290G p-8Y-FGFR2c S252W FGFBPUb-(Y55/Y227)p-SPRY2SHC1-2 FGF20 FGFR2b C3 variant GRB2-1 Activated FGFR2cmutants withenhancedligand-bindingactivatedFGFR2:PLCG1FGF2(10-155) FGF7 FGFR2c S252W UBC(153-228) FGFR2c A314D FGFR2b P253R Activated FGFR2c homodimer bound to FGF AZD4547 Activated FGFR2mutants:p-4Y-PLCG1FGFR2b-binding FGFs p-8Y-FGFR2c A314D Activated FGFR2 mutants with enhanced kinase activity FGF3 FGFBP2 p-T185,Y187-MAPK1 FGF9 ADPActivated FGFR2b homodimer bound to FGF GRB2-1 FGFR2 W290C FGFR2b long PD173074 p-Y371-CBL FGF10 UBC(381-456) FGF2(10-155) FGFR2c-binding FGFs FGFR2b-binding FGFs FGF7 FGFR2c A315T FGFR2b short p-Y55,Y227-SPRY2 IL17RD-1 FGF2,7,10,22BGJ398 UBC(229-304) p-T250,T255,T385,S437-MKNK1GAB1 BGJ398 p-8Y-FGFR2c A315S mutant FGFR2 N549H NRAS p-MEK:ERKActivated FGFR2c homodimer bound to FGF ActivatedFGFR2:p-FRS2:GRB2:GAB1:PI3Kp-8Y-FGFR2c A314D UBC(381-456) p-8Y-FGFR2c A315T Activated FGFR2c homodimer bound to FGF HS Activated FGFR2 ligand-independent mutants MAPK1 FGFR2c P253R IL17RD-4 GAB1 Activated FGFR2ligand-independentmutantsATPp-8Y-FGFR2 K660M FGFR2 mutants withenhanced kinaseactivityp-8Y-FGFR2c A314S p-6Y-FGFR2b C3 variant p-6Y-FRS2 p-8Y-FGFR2c S252W FGF9 p-6Y-FRS2 p-8Y-FGFR2c A314D p-8Y-FGFR2c P253R p-8Y-FGFR2c A314D p-Y194,Y195,Y272-SHC1-1(156-583) FGF22 p-8Y-FGFR2 K660E FGFR2ligand-independentmutant dimersActivated FGFR2c homodimer bound to FGF FGF10 Activated FGFR2 ligand-independent mutants BGJ398 ATPGAB1 FGFR2b-binding FGFs FGF9 p-8Y-FGFR2c long FGF9 FGFR2 mutant dimers with enhanced kinase activity BRAFFGF2(10-155) p-8Y-FGFR2c A314S ATPSRC-1UBC(153-228) FGF16 p-8Y-FGFR2c A315S mutant p-8Y-FGFR2b S252W PPP2R1A AZD4547 UBC(609-684) FGFR2c Y375C GRB2-1 FGFR2b Y376C IL17RDPI(3,4,5)P3 PPP2R1A p-8Y-FGFR2c W290G Activated FGFR2c homodimer bound to FGF p-8Y-FGFR2 W290C p-8Y-FGFR2 K660N PP2A(A:C):S112/S121-pSPRY2FGFR2b-binding FGFsFGF8-1 ActivatedFGFR2:pY-SHC1AZD4547 ADPp-6Y-FRS2 FGF9 p-8Y-FGFR2c A314S p-S218,S222-MAP2K1 PI(3,4,5)P3 p-8Y-FGFR2c S252W GDP FGF10 p-8Y-FGFR2b S376C FGFR2 N549K CBLUBC(77-152) PIK3R1 Activated FGFR2 mutants with enhanced kinase activity FGFR2b-binding FGFs FGF7 PTPN11Phospho-MEKUBB(153-228) FP-1039 FGFR2mutants:p-FRS2:GRB2:SOS1p-T185,Y187-MAPK1 HRAS FGF2(10-155) UBC(609-684) GRB2:GAB1:PIK3R1GRB2-1 p-8Y-FGFR2c P253R PIK3CA PD173074 Activated overexpressed FGFR2 dimers FGFR2 UBC(533-608) p-8Y-FGFR2c P253R PPP2R1A Activated FGFR2b homodimer bound to FGF Activated FGFR2b homodimer bound to FGF Activated FGFR2:FRS2FGF9 FGFR2b short p-Y194,Y195,Y272-SHC1-1(156-583) FRS2 NRAS HSp-Y239,Y240,Y317-SHC1-2 UBB(77-152) FGF9 p-8Y-FGFR2 N549H AZ 2171 ActivatedFGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PI3Kp-Y55,Y227-SPRY2 p-8Y-FGFR2c A315T ADPPPP2CA Activated FGFR2b homodimer bound to FGF Activated FGFR2b homodimer bound to FGF FGFR2 S267P p-8Y-FGFR2c A314D p-8Y-FGFR2b S252W UBC(153-228) FGFR2c A315S PP2A(A:C):Y55/Y227-pSPRY2FGFR2b-binding FGFs p-8Y-FGFR2c A315S mutant FGFR2c A315S GAB1 GRB2-1 Activated FGFR2 ligand-independent mutants PPP2CA Overexpressed FGFR2homodimers:GP369FGF9 ATPp-8Y-FGFR2c A314D FGFR2b homodimerbound to FGFActivated FGFR2c homodimer bound to FGF PIK3R1p-T202,Y204-MAPK3 ATPFGFR2c long ADPp-8Y-FGFR2c A314S ADPp-8Y-FGFR2-3 FGFR2c-binding FGFs FGFR2c short Activated FGFR2:FRS3HS FGFR2 point mutantdimers:TKIsHS FGFR2c A314D UBB(1-76) p-6Y-FRS2 HS GRB2-1 UBC(1-76) ADPFGFR2c homodimerbound to FGFGDPSPRY2 GRB2-1 UBC(533-608) SHC1-3 p-6Y-FRS2 ADPFGFR2b-binding FGFs FGFR2c A314S BRAF FGFR2b-binding FGFs FGF2(10-155) FGFBP2 OverexpressedFGFR2:TKIsSHC1-2 PIK3R1 p-Y55,Y227-SPRY2 FGF6 p-6Y-FRS2 GRB2-1 FGFR2b mutant dimerswith enhancedligand-bindingbound to FGFsActivated FGFR2b homodimer bound to FGF FGF2(10-155) UBA52(1-76) FRS2 PIK3R1 Activated FGFR2c homodimer bound to FGF p-8Y-FGFR2b P253R p-8Y-FGFR2 15, 18, 27, 30, 41...107, 133, 134, 15335, 59, 75, 105133, 134, 153107, 133, 134, 153133, 134, 153107, 133, 134, 1539, 64, 1374, 52107, 133, 134, 15344, 13654, 75, 142, 1535086101, 139153133, 134, 153101, 139107, 133, 134, 153101, 139133, 134, 153107, 133, 134, 1539, 64, 137107, 133, 134, 153107, 133, 134, 15315357, 80, 92, 15354107, 133, 134, 153133, 134, 153107, 133, 134, 15315331, 54133, 134, 1531136435, 59, 75, 10544, 13654, 666444, 1361534, 5211344, 13615254, 75, 142, 153107, 133, 134, 153152546454, 83, 107, 153133, 134, 153107, 133, 134, 153101, 1398888107, 133, 134, 153133, 134, 1531319, 64, 13715344, 136132133, 134, 153549, 6444, 136133, 134, 15347, 70, 12745, 88, 153153544686107, 133, 134, 153107, 133, 134, 1539, 64, 1371085, 110133, 134, 153459, 64, 137549, 64, 137133, 134, 1539, 64, 1374, 5250, 5544, 1365, 110107, 133, 134, 15344, 136133, 134, 153107, 133, 134, 153107, 133, 134, 15347, 70, 12754, 66133, 134, 1539, 50, 539, 64, 137133, 134, 1531539344, 13613144, 1365, 11044, 13635, 59, 75, 105133, 134, 153133, 134, 153152133, 134, 153133, 134, 15350, 5554, 8344, 136150133, 134, 15357, 80, 92, 1536431, 5454, 107, 153107, 133, 134, 15315313254, 8354, 107, 153107, 133, 134, 153133, 134, 153107, 133, 134, 153133, 134, 153107, 133, 134, 153107, 133, 134, 15376, 139107, 133, 134, 153133, 134, 1539, 64, 137131133, 134, 1539344, 136685444, 13613188133, 134, 15345, 88, 153133, 134, 15346107, 133, 134, 1531174644, 136107, 133, 134, 15346133, 134, 15335, 59, 75, 105


Description

The 22 members of the fibroblast growth factor (FGF) family of growth factors mediate their cellular responses by binding to and activating the different isoforms encoded by the four receptor tyrosine kinases (RTKs) designated FGFR1, FGFR2, FGFR3 and FGFR4. These receptors are key regulators of several developmental processes in which cell fate and differentiation to various tissue lineages are determined. Unlike other growth factors, FGFs act in concert with heparin or heparan sulfate proteoglycan (HSPG) to activate FGFRs and to induce the pleiotropic responses that lead to the variety of cellular responses induced by this large family of growth factors. An alternative, FGF-independent, source of FGFR activation originates from the interaction with cell adhesion molecules, typically in the context of interactions on neural cell membranes and is crucial for neuronal survival and development.

Upon ligand binding, receptor dimers are formed and their intrinsic tyrosine kinase is activated causing phosphorylation of multiple tyrosine residues on the receptors. These then serve as docking sites for the recruitment of SH2 (src homology-2) or PTB (phosphotyrosine binding) domains of adaptors, docking proteins or signaling enzymes. Signaling complexes are assembled and recruited to the active receptors resulting in a cascade of phosphorylation events.

This leads to stimulation of intracellular signaling pathways that control cell proliferation, cell differentiation, cell migration, cell survival and cell shape, depending on the cell type or stage of maturation.
View original pathway at:Reactome.

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  138. Ahmed Z, Schüller AC, Suhling K, Tregidgo C, Ladbury JE.; ''Extracellular point mutations in FGFR2 elicit unexpected changes in intracellular signalling.''; PubMed Europe PMC Scholia
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  143. Mauger DM, Lin C, Garcia-Blanco MA.; ''hnRNP H and hnRNP F complex with Fox2 to silence fibroblast growth factor receptor 2 exon IIIc.''; PubMed Europe PMC Scholia
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  150. Cargnello M, Roux PP.; ''Activation and function of the MAPKs and their substrates, the MAPK-activated protein kinases.''; PubMed Europe PMC Scholia
  151. Ong SH, Guy GR, Hadari YR, Laks S, Gotoh N, Schlessinger J, Lax I.; ''FRS2 proteins recruit intracellular signaling pathways by binding to diverse targets on fibroblast growth factor and nerve growth factor receptors.''; PubMed Europe PMC Scholia
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  153. Newman EA, Muh SJ, Hovhannisyan RH, Warzecha CC, Jones RB, McKeehan WL, Carstens RP.; ''Identification of RNA-binding proteins that regulate FGFR2 splicing through the use of sensitive and specific dual color fluorescence minigene assays.''; PubMed Europe PMC Scholia
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History

View all...
CompareRevisionActionTimeUserComment
113035view12:06, 30 October 2020DeSlChanged layout for 2 complexes (included at least one small DataNode at top left corner, stretching the whole complex visually).
112410view15:35, 9 October 2020ReactomeTeamReactome version 73
101314view11:20, 1 November 2018ReactomeTeamreactome version 66
100851view20:52, 31 October 2018ReactomeTeamreactome version 65
100392view19:26, 31 October 2018ReactomeTeamreactome version 64
99940view16:10, 31 October 2018ReactomeTeamreactome version 63
99496view14:43, 31 October 2018ReactomeTeamreactome version 62 (2nd attempt)
99145view12:41, 31 October 2018ReactomeTeamreactome version 62
94045view13:53, 16 August 2017ReactomeTeamreactome version 61
93670view11:30, 9 August 2017ReactomeTeamreactome version 61
87128view18:46, 18 July 2016EgonwOntology Term : 'signaling pathway' added !
86794view09:26, 11 July 2016ReactomeTeamreactome version 56
83308view10:45, 18 November 2015ReactomeTeamVersion54
81446view12:58, 21 August 2015ReactomeTeamNew pathway

External references

DataNodes

View all...
NameTypeDatabase referenceComment
ADPMetaboliteCHEBI:16761 (ChEBI)
ATPMetaboliteCHEBI:15422 (ChEBI)
AZ 2171 MetaboliteCHEBI:556867 (ChEBI) A broad specificity ATP-competitive inhibitor of FGF-, VEGF-, PDGF- and KIT receptors that is in Phase I and II clinical trials for treatment of gastric, breast and endometrial cancers.
AZD4547 MetaboliteCHEBI:63453 (ChEBI) AZD4547 (Astra Zeneca) is a pan-FGFR inhibitor in Phase I clinical trials for patients with advanced gastric cancer (NCT01457846) and for patient with advanced solid tumors with or without amplified FGFR1 or 2 (NCT00979134) and in Phase I/II trials for breast cancer patients with FGFR1 amplifications (NCT01202591).
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PI3K
ComplexR-HSA-5655337 (Reactome)
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PIK3R1
ComplexR-HSA-5655330 (Reactome)
Activated FGFR2:p-8T-FRS2ComplexR-HSA-5654281 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PI3KComplexR-HSA-5654190 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PIK3R1ComplexR-HSA-5654189 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PI3KComplexR-HSA-5654192 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PIK3R1ComplexR-HSA-5654194 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:p-CBL:GRB2ComplexR-HSA-5654286 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11ComplexR-HSA-5654184 (Reactome)
Activated FGFR2:p-FRS2ComplexR-HSA-5654201 (Reactome)
Activated FGFR2:p-FRS3ComplexR-HSA-5654284 (Reactome)
Activated FGFR2:p-FRS:GRB2:SOS1ComplexR-HSA-5654287 (Reactome)
Activated FGFR2:p-FRS:PTPN11ComplexR-HSA-5654290 (Reactome)
Activated FGFR2:p-FRS:p-PTPN11ComplexR-HSA-5654291 (Reactome)
Activated FGFR2:p-FRSComplexR-HSA-5654283 (Reactome)
Activated FGFR2:pY-SHC1:GRB2:SOS1ComplexR-HSA-5654296 (Reactome)
Activated FGFR2:pY-SHC1ComplexR-HSA-5654294 (Reactome)
Activated

overexpressed FGFR2

dimers
ComplexR-HSA-2029940 (Reactome)
Activated FGFR2

ligand-independent

mutants
ComplexR-HSA-2029948 (Reactome)
Activated FGFR2

mutants with enhanced kinase

activity
ComplexR-HSA-2033348 (Reactome)
Activated FGFR2 mutants:FRS2ComplexR-HSA-5655257 (Reactome)
Activated FGFR2 mutants:PLCG1ComplexR-HSA-5655346 (Reactome)
Activated FGFR2 mutants:p-4Y-PLCG1ComplexR-HSA-5654745 (Reactome)
Activated FGFR2 mutants:p-FRS2ComplexR-HSA-5655236 (Reactome)
Activated FGFR2 mutantsComplexR-HSA-5654747 (Reactome)
Activated FGFR2 ligand-independent mutants R-HSA-2029948 (Reactome)
Activated FGFR2 mutants with enhanced kinase activity R-HSA-2033348 (Reactome)
Activated FGFR2:FRS2ComplexR-HSA-5654178 (Reactome)
Activated FGFR2:FRS3ComplexR-HSA-5654277 (Reactome)
Activated FGFR2:SHC1ComplexR-HSA-5654279 (Reactome)
Activated FGFR2ComplexR-HSA-5654152 (Reactome)
Activated FGFR2b

homodimer bound to

FGF
ComplexR-HSA-192606 (Reactome)
Activated FGFR2b

mutants with enhanced ligand

binding
ComplexR-HSA-2065931 (Reactome)
Activated FGFR2b homodimer bound to FGF R-HSA-192606 (Reactome)
Activated FGFR2c

homodimer bound to

FGF
ComplexR-HSA-192616 (Reactome)
Activated FGFR2c

mutants with enhanced

ligand-binding
ComplexR-HSA-2065989 (Reactome)
Activated FGFR2c homodimer bound to FGF R-HSA-192616 (Reactome)
Activated overexpressed FGFR2 dimers R-HSA-2029940 (Reactome)
BGJ398 MetaboliteCHEBI:63451 (ChEBI) A pan-FGFR ATP-competitive inhibitor that is in phase I clinical trials for advanced solid malignancies with amplification or activation of FGFR1 and 2 or activation of FGFR3 (NCT01004224).
BRAF ProteinP15056 (Uniprot-TrEMBL)
BRAFProteinP15056 (Uniprot-TrEMBL)
CBL ProteinP22681 (Uniprot-TrEMBL)
CBLProteinP22681 (Uniprot-TrEMBL)
DAG and IP3 signalingPathwayR-HSA-1489509 (Reactome) This pathway describes the generation of DAG and IP3 by the PLCgamma-mediated hydrolysis of PIP2 and the subsequent downstream signaling events.
E3810 MetaboliteCHEBI:65138 (ChEBI) E-3810 is a dual VEGFR and FGFR inhibitor that has anti-angiogenic and anti-tumorigenic effects in preclinical studies (Bello, 2011). It is in Phase I clinical trials for patients with solid tumors (NCT01283945).
E7080 MetaboliteCHEBI:816009 (ChEBI) E7080 is a broad-specificity tyrosine kinase inhibitor that is in Phase I clinical trials for a variety of solid malignancies, including metastatic endometrial cancer (NCT01111461). No specific data regarding its preclinical efficacy against activated FGF receptors is available.
FGF1 ProteinP05230 (Uniprot-TrEMBL)
FGF10 ProteinO15520 (Uniprot-TrEMBL)
FGF16 ProteinO43320 (Uniprot-TrEMBL)
FGF17-1 ProteinO60258-1 (Uniprot-TrEMBL)
FGF18 ProteinO76093 (Uniprot-TrEMBL)
FGF2(10-155) ProteinP09038 (Uniprot-TrEMBL)
FGF2,7,10,22ComplexR-HSA-5656048 (Reactome)
FGF20 ProteinQ9NP95 (Uniprot-TrEMBL)
FGF22 ProteinQ9HCT0 (Uniprot-TrEMBL)
FGF23(25-251) ProteinQ9GZV9 (Uniprot-TrEMBL)
FGF3 ProteinP11487 (Uniprot-TrEMBL)
FGF4 ProteinP08620 (Uniprot-TrEMBL)
FGF5-1 ProteinP12034-1 (Uniprot-TrEMBL)
FGF6 ProteinP10767 (Uniprot-TrEMBL)
FGF7 ProteinP21781 (Uniprot-TrEMBL)
FGF8-1 ProteinP55075-1 (Uniprot-TrEMBL)
FGF9 ProteinP31371 (Uniprot-TrEMBL)
FGFBP1 ProteinQ14512 (Uniprot-TrEMBL)
FGFBP2 ProteinQ9BYJ0 (Uniprot-TrEMBL)
FGFBP3 ProteinQ8TAT2 (Uniprot-TrEMBL)
FGFBP:FGFComplexR-HSA-5656071 (Reactome)
FGFBPComplexR-HSA-5656046 (Reactome)
FGFR2

ligand-independent

mutant dimers
ComplexR-HSA-2029952 (Reactome)
FGFR2

ligand-independent

mutants
ComplexR-HSA-2029955 (Reactome)
FGFR2 mutants:p-FRS2:GRB2:SOS1ComplexR-HSA-5655345 (Reactome)
FGFR2 K660E ProteinP21802 (Uniprot-TrEMBL)
FGFR2 K660M ProteinP21802 (Uniprot-TrEMBL)
FGFR2 K660N ProteinP21802 (Uniprot-TrEMBL)
FGFR2 L764fs*4 ProteinP21802 (Uniprot-TrEMBL)
FGFR2 N549H ProteinP21802 (Uniprot-TrEMBL)
FGFR2 N549K ProteinP21802 (Uniprot-TrEMBL)
FGFR2 ProteinP21802 (Uniprot-TrEMBL)
FGFR2 S267P ProteinP21802 (Uniprot-TrEMBL)
FGFR2 W290C ProteinP21802 (Uniprot-TrEMBL)
FGFR2 ligand-independent mutant dimers R-HSA-2029952 (Reactome)
FGFR2 mutant dimers

with enhanced

kinase activity
ComplexR-HSA-2033349 (Reactome)
FGFR2 mutant dimers with enhanced kinase activity R-HSA-2033349 (Reactome)
FGFR2 mutants with

enhanced kinase

activity
ComplexR-HSA-2033351 (Reactome)
FGFR2 point mutant dimers:TKIsComplexR-HSA-2077404 (Reactome)
FGFR2 point mutant dimersComplexR-HSA-2077401 (Reactome)
FGFR2b

mutant-binding

FGFs:FP-1039
ComplexR-HSA-2077406 (Reactome)
FGFR2b mutant-binding FGFsComplexR-HSA-2065925 (Reactome)
FGFR2b C3 variant ProteinP21802-17 (Uniprot-TrEMBL)
FGFR2b P253R ProteinP21802-3 (Uniprot-TrEMBL) also Apert
FGFR2b S252W ProteinP21802-3 (Uniprot-TrEMBL) also Apert
FGFR2b S373C ProteinP21802-3 (Uniprot-TrEMBL)
FGFR2b Y376C ProteinP21802-3 (Uniprot-TrEMBL)
FGFR2b homodimer bound to FGFComplexR-HSA-192615 (Reactome)
FGFR2b long ProteinP21802-3 (Uniprot-TrEMBL)
FGFR2b mutant dimers

with enhanced ligand-binding

bound to FGFs
ComplexR-HSA-2065929 (Reactome)
FGFR2b mutants with

enhanced ligand

binding
ComplexR-HSA-2033371 (Reactome)
FGFR2b short ProteinP21802-18 (Uniprot-TrEMBL)
FGFR2b-binding FGFs R-HSA-189967 (Reactome)
FGFR2b-binding FGFsComplexR-HSA-189967 (Reactome)
FGFR2bComplexR-HSA-192604 (Reactome)
FGFR2c A314D ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c A314S ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c A315S ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c A315T ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c P253R ProteinP21802-1 (Uniprot-TrEMBL) also Apert
FGFR2c S252W ProteinP21802-1 (Uniprot-TrEMBL) also Apert
FGFR2c S372C ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c W290G ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c Y375C ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c homodimer bound to FGFComplexR-HSA-192594 (Reactome)
FGFR2c long ProteinP21802-1 (Uniprot-TrEMBL)
FGFR2c mutant binding FGFsComplexR-HSA-2065982 (Reactome)
FGFR2c mutant dimers

with enhanced ligand-binding

bound to FGFs
ComplexR-HSA-2065986 (Reactome)
FGFR2c mutants with

enhanced ligand

binding
ComplexR-HSA-2033375 (Reactome)
FGFR2c short ProteinP21802-5 (Uniprot-TrEMBL)
FGFR2c-binding FGFs R-HSA-189957 (Reactome)
FGFR2c-binding FGFsComplexR-HSA-189957 (Reactome)
FGFR2cComplexR-HSA-192596 (Reactome)
FP-1039 R-NUL-2077408 (Reactome) FP-1039 is an FGFR1c:Fc fragment that acts as a broad FGF- ligand trap. Developed by FivePrime therapeutics (http://www.fiveprime.com/index.php?option=com_content&view=article&id=222&Itemid=153), FP-1039 is in Phase I clinical trials in solid malignancies and in Phase II trials in endometrial cancer patients carrying the FGFR2 S252W or P253R alleles.
FP-1039R-NUL-2077408 (Reactome) FP-1039 is an FGFR1c:Fc fragment that acts as a broad FGF- ligand trap. Developed by FivePrime therapeutics (http://www.fiveprime.com/index.php?option=com_content&view=article&id=222&Itemid=153), FP-1039 is in Phase I clinical trials in solid malignancies and in Phase II trials in endometrial cancer patients carrying the FGFR2 S252W or P253R alleles.
FRS2 ProteinQ8WU20 (Uniprot-TrEMBL)
FRS2ProteinQ8WU20 (Uniprot-TrEMBL)
FRS3 ProteinO43559 (Uniprot-TrEMBL)
FRS3ProteinO43559 (Uniprot-TrEMBL)
GAB1 ProteinQ13480 (Uniprot-TrEMBL)
GDP MetaboliteCHEBI:17552 (ChEBI)
GDPMetaboliteCHEBI:17552 (ChEBI)
GP369 R-NUL-2067712 (Reactome)
GP369R-NUL-2067712 (Reactome)
GRB2-1 ProteinP62993-1 (Uniprot-TrEMBL)
GRB2-1:SOS1ComplexR-HSA-109797 (Reactome)
GRB2-1ProteinP62993-1 (Uniprot-TrEMBL)
GRB2:GAB1:PIK3R1ComplexR-HSA-179864 (Reactome)
GRB2:GAB1ComplexR-HSA-179849 (Reactome)
GTP MetaboliteCHEBI:15996 (ChEBI)
GTPMetaboliteCHEBI:15996 (ChEBI)
HRAS ProteinP01112 (Uniprot-TrEMBL)
HS MetaboliteCHEBI:28815 (ChEBI)
HSMetaboliteCHEBI:28815 (ChEBI)
IL17RD-1 ProteinQ8NFM7-1 (Uniprot-TrEMBL)
IL17RD-1ProteinQ8NFM7-1 (Uniprot-TrEMBL)
IL17RD-4 ProteinQ8NFM7-4 (Uniprot-TrEMBL)
IL17RDComplexR-HSA-1268209 (Reactome)
KRAS ProteinP01116 (Uniprot-TrEMBL)
MAPK1 ProteinP28482 (Uniprot-TrEMBL)
MAPK3 ProteinP27361 (Uniprot-TrEMBL)
NRAS ProteinP01111 (Uniprot-TrEMBL)
Overexpressed FGFR2:TKIsComplexR-HSA-2029966 (Reactome)
Overexpressed FGFR2 homodimers:GP369ComplexR-HSA-2067714 (Reactome)
Overexpressed FGFR2 homodimersComplexR-HSA-2029963 (Reactome)
Overexpressed FGFR2ComplexR-HSA-2029960 (Reactome)
PD173074 MetaboliteCHEBI:63448 (ChEBI) PD173074 is potent pan-FGFR reversible inhibitor that interacts with residues in the ATP-binding pocket and inhibits tyrosine kinase activity and autophosphorylation (Mohammadi, 1998; Ezzat, 2005). PD173074 is not suitable for therapeutic use due to issues with toxicity.
PI(3,4,5)P3 MetaboliteCHEBI:16618 (ChEBI)
PI(3,4,5)P3MetaboliteCHEBI:16618 (ChEBI)
PI(4,5)P2MetaboliteCHEBI:18348 (ChEBI)
PIK3CA ProteinP42336 (Uniprot-TrEMBL)
PIK3CAProteinP42336 (Uniprot-TrEMBL)
PIK3R1 ProteinP27986 (Uniprot-TrEMBL)
PIK3R1ProteinP27986 (Uniprot-TrEMBL)
PIP3 activates AKT signalingPathwayR-HSA-1257604 (Reactome) Signaling by AKT is one of the key outcomes of receptor tyrosine kinase (RTK) activation. AKT is activated by the cellular second messenger PIP3, a phospholipid that is generated by PI3K. In ustimulated cells, PI3K class IA enzymes reside in the cytosol as inactive heterodimers composed of p85 regulatory subunit and p110 catalytic subunit. In this complex, p85 stabilizes p110 while inhibiting its catalytic activity. Upon binding of extracellular ligands to RTKs, receptors dimerize and undergo autophosphorylation. The regulatory subunit of PI3K, p85, is recruited to phosphorylated cytosolic RTK domains either directly or indirectly, through adaptor proteins, leading to a conformational change in the PI3K IA heterodimer that relieves inhibition of the p110 catalytic subunit. Activated PI3K IA phosphorylates PIP2, converting it to PIP3; this reaction is negatively regulated by PTEN phosphatase. PIP3 recruits AKT to the plasma membrane, allowing TORC2 to phosphorylate a conserved serine residue of AKT. Phosphorylation of this serine induces a conformation change in AKT, exposing a conserved threonine residue that is then phosphorylated by PDPK1 (PDK1). Phosphorylation of both the threonine and the serine residue is required to fully activate AKT. The active AKT then dissociates from PIP3 and phosphorylates a number of cytosolic and nuclear proteins that play important roles in cell survival and metabolism. For a recent review of AKT signaling, please refer to Manning and Cantley, 2007.
PLCG1 ProteinP19174 (Uniprot-TrEMBL)
PLCG1ProteinP19174 (Uniprot-TrEMBL)
PP2A (A:C)ComplexR-HSA-934544 (Reactome)
PP2A(A:C):S112/S121-pSPRY2ComplexR-HSA-934578 (Reactome)
PP2A(A:C):SPRY2ComplexR-HSA-934550 (Reactome)
PP2A(A:C):Y55/Y227-pSPRY2ComplexR-HSA-934598 (Reactome)
PPA2A

(A:C):S112/S115

p-SPRY2
ComplexR-HSA-1295605 (Reactome)
PPA2A (A:C):Y55/Y227 p-SPRY2:GRB2ComplexR-HSA-1295625 (Reactome)
PPA2A(A:C):SPRY2ComplexR-HSA-1295593 (Reactome)
PPP2CA ProteinP67775 (Uniprot-TrEMBL)
PPP2CB ProteinP62714 (Uniprot-TrEMBL)
PPP2R1A ProteinP30153 (Uniprot-TrEMBL)
PTPN11 ProteinQ06124 (Uniprot-TrEMBL)
PTPN11ProteinQ06124 (Uniprot-TrEMBL)
Phospho-MEKComplexR-HSA-169287 (Reactome)
Phosphorylated Fibroblast growth factor receptor 2b short ProteinP21802-18 (Uniprot-TrEMBL)
PiMetaboliteCHEBI:18367 (ChEBI)
RAF/MAP kinase cascadePathwayR-HSA-5673001 (Reactome) The RAS-RAF-MEK-ERK pathway regulates processes such as proliferation, differentiation, survival, senescence and cell motility in response to growth factors, hormones and cytokines, among others. Binding of these stimuli to receptors in the plasma membrane promotes the GEF-mediated activation of RAS at the plasma membrane and initiates the three-tiered kinase cascade of the conventional MAPK cascades. GTP-bound RAS recruits RAF (the MAPK kinase kinase), and promotes its dimerization and activation (reviewed in Cseh et al, 2014; Roskoski, 2010; McKay and Morrison, 2007; Wellbrock et al, 2004). Activated RAF phosphorylates the MAPK kinase proteins MEK1 and MEK2 (also known as MAP2K1 and MAP2K2), which in turn phophorylate the proline-directed kinases ERK1 and 2 (also known as MAPK3 and MAPK1) (reviewed in Roskoski, 2012a, b; Kryiakis and Avruch, 2012). Activated ERK proteins may undergo dimerization and have identified targets in both the nucleus and the cytosol; consistent with this, a proportion of activated ERK protein relocalizes to the nucleus in response to stimuli (reviewed in Roskoski 2012b; Turjanski et al, 2007; Plotnikov et al, 2010; Cargnello et al, 2011). Although initially seen as a linear cascade originating at the plasma membrane and culminating in the nucleus, the RAS/RAF MAPK cascade is now also known to be activated from various intracellular location. Temporal and spatial specificity of the cascade is achieved in part through the interaction of pathway components with numerous scaffolding proteins (reviewed in McKay and Morrison, 2007; Brown and Sacks, 2009).
The importance of the RAS/RAF MAPK cascade is highlighted by the fact that components of this pathway are mutated with high frequency in a large number of human cancers. Activating mutations in RAS are found in approximately one third of human cancers, while ~8% of tumors express an activated form of BRAF (Roberts and Der, 2007; Davies et al, 2002; Cantwell-Dorris et al, 2011).
RPS27A(1-76) ProteinP62979 (Uniprot-TrEMBL)
S111/S120 p-SPRY2:B-RAFComplexR-HSA-1295587 (Reactome)
SHC1 p46,p52ComplexR-HSA-1169480 (Reactome) SHC1 isoforms p46 and p52 are found in B cells (Smit et al. 1994).
SHC1-2 ProteinP29353-2 (Uniprot-TrEMBL)
SHC1-3 ProteinP29353-3 (Uniprot-TrEMBL)
SOS1 ProteinQ07889 (Uniprot-TrEMBL)
SPRY2 ProteinO43597 (Uniprot-TrEMBL)
SPRY2:B-RAFComplexR-HSA-1295598 (Reactome)
SRC-1ProteinP12931-1 (Uniprot-TrEMBL)
SU5402 MetaboliteCHEBI:63449 (ChEBI) SU5402 is an ATP-competitive FGFR and VEGFR inhibitor that is used as an in vitro reagent. Su5402 is not suitable for therapeutic use due to toxicity issues.
Tyrosine kinase

inhibitors of

overexpressed FGFR2
ComplexR-HSA-R-ALL-2029965 (Reactome)
Tyrosine kinase

inhibitors of FGFR2

mutants
ComplexR-HSA-R-ALL-2077403 (Reactome)
UBA52(1-76) ProteinP62987 (Uniprot-TrEMBL)
UBB(1-76) ProteinP0CG47 (Uniprot-TrEMBL)
UBB(153-228) ProteinP0CG47 (Uniprot-TrEMBL)
UBB(77-152) ProteinP0CG47 (Uniprot-TrEMBL)
UBC(1-76) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(153-228) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(229-304) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(305-380) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(381-456) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(457-532) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(533-608) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(609-684) ProteinP0CG48 (Uniprot-TrEMBL)
UBC(77-152) ProteinP0CG48 (Uniprot-TrEMBL)
Ub-(Y55/Y227)p-SPRY2ComplexR-HSA-1370875 (Reactome)
Ub-Activated FGFR2 complex:Ub-p-FRS2ComplexR-HSA-5654360 (Reactome)
Ub:Y55/Y227-pSPRY2:CBLComplexR-HSA-934572 (Reactome)
UbComplexR-HSA-113595 (Reactome)
Y55/Y227-pSPRY2:CBLComplexR-HSA-934576 (Reactome)
activated FGFR2:PLCG1ComplexR-HSA-5654162 (Reactome)
activated FGFR2:p-4Y-PLCG1ComplexR-HSA-5654150 (Reactome)
p-4Y-PLCG1 ProteinP19174 (Uniprot-TrEMBL)
p-4Y-PLCG1ProteinP19174 (Uniprot-TrEMBL)
p-5Y-FRS3 ProteinO43559 (Uniprot-TrEMBL) The phospho-tyrosine positions for FRS2-beta were inferred by similarity to the analogous positions in FRS2-alpha. Five out of six tyrosine positions in alpha are present in beta.
p-6Y-FGFR2b C3 variant ProteinP21802-17 (Uniprot-TrEMBL)
p-6Y-FRS2 ProteinQ8WU20 (Uniprot-TrEMBL)
p-8T-FRS2 ProteinQ8WU20 (Uniprot-TrEMBL)
p-8Y-FGFR2 K660E ProteinP21802 (Uniprot-TrEMBL)
p-8Y-FGFR2 K660M ProteinP21802 (Uniprot-TrEMBL)
p-8Y-FGFR2 K660N ProteinP21802 (Uniprot-TrEMBL)
p-8Y-FGFR2 N549H ProteinP21802 (Uniprot-TrEMBL)
p-8Y-FGFR2 N549K ProteinP21802 (Uniprot-TrEMBL)
p-8Y-FGFR2 ProteinP21802 (Uniprot-TrEMBL) This represents WT FGFR2 of either the IIIb or IIIc isoform that is found overexpressed in some cancers. Sites of tyrosine phosphorylation are marked as unknown to circumvent the numbering differences between the isoform variants.
p-8Y-FGFR2 S267P ProteinP21802 (Uniprot-TrEMBL) This represents FGFR2 S267C of either the IIIb or IIIC isoform; as such, the positions for tyrosine phosphorylation are marked as unknown to circumvent the difference in numbering between isoforms.
p-8Y-FGFR2 W290C ProteinP21802 (Uniprot-TrEMBL) This represents FGFR2 W290C of either the IIIb or IIIC isoform; as such, the positions for tyrosine phosphorylation are marked as unknown to circumvent the difference in numbering between isoforms.
p-8Y-FGFR2-3 ProteinP21802-3 (Uniprot-TrEMBL)
p-8Y-FGFR2-5 ProteinP21802-5 (Uniprot-TrEMBL)
p-8Y-FGFR2b P253R ProteinP21802-3 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2b S252W ProteinP21802-3 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2b S373C ProteinP21802-3 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2b S376C ProteinP21802-3 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2c A314D ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c A314S ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c A315S mutant ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c A315T ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c P253R ProteinP21802-1 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2c S252W ProteinP21802-1 (Uniprot-TrEMBL) also Apert
p-8Y-FGFR2c S372C ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c W290G ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c Y375C ProteinP21802-1 (Uniprot-TrEMBL)
p-8Y-FGFR2c long ProteinP21802-1 (Uniprot-TrEMBL)
p-MEK:ERKComplexR-HSA-1268217 (Reactome)
p-MEK:p-ERKComplexR-HSA-1268207 (Reactome)
p-S,T-MAP2K2 ProteinP36507 (Uniprot-TrEMBL)
p-S111,S120-SPRY2 ProteinO43597 (Uniprot-TrEMBL)
p-S111,S120-SPRY2ProteinO43597 (Uniprot-TrEMBL)
p-S112,S115-SPRY2 ProteinO43597 (Uniprot-TrEMBL)
p-S112,S121-SPRY2 ProteinO43597 (Uniprot-TrEMBL)
p-S218,S222-MAP2K1 ProteinQ02750 (Uniprot-TrEMBL)
p-S222,S226-MAP2K2 ProteinP36507 (Uniprot-TrEMBL)
p-T,Y MAPK dimersComplexR-HSA-1268261 (Reactome)
p-T,Y MAPKsComplexR-HSA-169289 (Reactome)
p-T185,Y187-MAPK1 ProteinP28482 (Uniprot-TrEMBL)
p-T202,Y204-MAPK3 ProteinP27361 (Uniprot-TrEMBL)
p-T250,T255,T385,S437-MKNK1ProteinQ9BUB5 (Uniprot-TrEMBL)
p-Y194,Y195,Y272-SHC1-1(156-583) ProteinP29353-3 (Uniprot-TrEMBL)
p-Y239,Y240,Y317-SHC1-2 ProteinP29353-2 (Uniprot-TrEMBL)
p-Y371-CBL ProteinP22681 (Uniprot-TrEMBL)
p-Y371-CBL:GRB2ComplexR-HSA-182964 (Reactome)
p-Y546,Y584-PTPN11 ProteinQ06124 (Uniprot-TrEMBL)
p-Y55,Y227-SPRY2 ProteinO43597 (Uniprot-TrEMBL)
p21 RAS:GDPComplexR-HSA-109796 (Reactome)
p21 RAS:GTPComplexR-HSA-109783 (Reactome)
phosphorylated FGFR2 L764fs*4 ProteinP21802 (Uniprot-TrEMBL)

Annotated Interactions

View all...
SourceTargetTypeDatabase referenceComment
ADPArrowR-HSA-1268210 (Reactome)
ADPArrowR-HSA-1295609 (Reactome)
ADPArrowR-HSA-190408 (Reactome)
ADPArrowR-HSA-190413 (Reactome)
ADPArrowR-HSA-2029984 (Reactome)
ADPArrowR-HSA-2029989 (Reactome)
ADPArrowR-HSA-2033486 (Reactome)
ADPArrowR-HSA-2033488 (Reactome)
ADPArrowR-HSA-2033490 (Reactome)
ADPArrowR-HSA-5654147 (Reactome)
ADPArrowR-HSA-5654397 (Reactome)
ADPArrowR-HSA-5654407 (Reactome)
ADPArrowR-HSA-5654562 (Reactome)
ADPArrowR-HSA-5654605 (Reactome)
ADPArrowR-HSA-5654607 (Reactome)
ADPArrowR-HSA-5654697 (Reactome)
ADPArrowR-HSA-5654701 (Reactome)
ADPArrowR-HSA-5655268 (Reactome)
ADPArrowR-HSA-5655301 (Reactome)
ADPArrowR-HSA-5655323 (Reactome)
ADPArrowR-HSA-934559 (Reactome)
ATPR-HSA-1268210 (Reactome)
ATPR-HSA-1295609 (Reactome)
ATPR-HSA-190408 (Reactome)
ATPR-HSA-190413 (Reactome)
ATPR-HSA-2029984 (Reactome)
ATPR-HSA-2029989 (Reactome)
ATPR-HSA-2033486 (Reactome)
ATPR-HSA-2033488 (Reactome)
ATPR-HSA-2033490 (Reactome)
ATPR-HSA-5654147 (Reactome)
ATPR-HSA-5654397 (Reactome)
ATPR-HSA-5654407 (Reactome)
ATPR-HSA-5654562 (Reactome)
ATPR-HSA-5654605 (Reactome)
ATPR-HSA-5654607 (Reactome)
ATPR-HSA-5654697 (Reactome)
ATPR-HSA-5654701 (Reactome)
ATPR-HSA-5655268 (Reactome)
ATPR-HSA-5655301 (Reactome)
ATPR-HSA-5655323 (Reactome)
ATPR-HSA-934559 (Reactome)
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PI3K
ArrowR-HSA-5655245 (Reactome)
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PI3K
mim-catalysisR-HSA-5655323 (Reactome)
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PIK3R1
ArrowR-HSA-5655320 (Reactome)
Activated

FGFR2

mutants:p-FRS2:GRB2:GAB1:PIK3R1
R-HSA-5655245 (Reactome)
Activated FGFR2:p-8T-FRS2ArrowR-HSA-5654562 (Reactome)
Activated FGFR2:p-8T-FRS2TBarR-HSA-5654397 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PI3KArrowR-HSA-5654614 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PI3Kmim-catalysisR-HSA-5654701 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PIK3R1ArrowR-HSA-5654612 (Reactome)
Activated FGFR2:p-FRS2:GRB2:GAB1:PIK3R1R-HSA-5654614 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PI3KArrowR-HSA-5654622 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PI3Kmim-catalysisR-HSA-5654697 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PIK3R1ArrowR-HSA-5654620 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:GRB2:GAB1:PIK3R1R-HSA-5654622 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:p-CBL:GRB2ArrowR-HSA-5654729 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:p-CBL:GRB2R-HSA-5654677 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11:p-CBL:GRB2mim-catalysisR-HSA-5654677 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11R-HSA-5654620 (Reactome)
Activated FGFR2:p-FRS2:p-PTPN11R-HSA-5654729 (Reactome)
Activated FGFR2:p-FRS2ArrowR-HSA-5654397 (Reactome)
Activated FGFR2:p-FRS2R-HSA-5654612 (Reactome)
Activated FGFR2:p-FRS3ArrowR-HSA-5654605 (Reactome)
Activated FGFR2:p-FRS:GRB2:SOS1ArrowR-HSA-5654615 (Reactome)
Activated FGFR2:p-FRS:GRB2:SOS1mim-catalysisR-HSA-5654618 (Reactome)
Activated FGFR2:p-FRS:PTPN11ArrowR-HSA-5654608 (Reactome)
Activated FGFR2:p-FRS:PTPN11R-HSA-5654607 (Reactome)
Activated FGFR2:p-FRS:PTPN11mim-catalysisR-HSA-5654607 (Reactome)
Activated FGFR2:p-FRS:p-PTPN11ArrowR-HSA-5654402 (Reactome)
Activated FGFR2:p-FRS:p-PTPN11ArrowR-HSA-5654607 (Reactome)
Activated FGFR2:p-FRSR-HSA-5654608 (Reactome)
Activated FGFR2:p-FRSR-HSA-5654615 (Reactome)
Activated FGFR2:pY-SHC1:GRB2:SOS1ArrowR-HSA-5654406 (Reactome)
Activated FGFR2:pY-SHC1:GRB2:SOS1mim-catalysisR-HSA-5654402 (Reactome)
Activated FGFR2:pY-SHC1ArrowR-HSA-5654407 (Reactome)
Activated FGFR2:pY-SHC1R-HSA-5654406 (Reactome)
Activated

overexpressed FGFR2

dimers
ArrowR-HSA-2029989 (Reactome)
Activated FGFR2

ligand-independent

mutants
ArrowR-HSA-2029984 (Reactome)
Activated FGFR2

mutants with enhanced kinase

activity
ArrowR-HSA-2033490 (Reactome)
Activated FGFR2 mutants:FRS2ArrowR-HSA-5655339 (Reactome)
Activated FGFR2 mutants:FRS2R-HSA-5655268 (Reactome)
Activated FGFR2 mutants:FRS2mim-catalysisR-HSA-5655268 (Reactome)
Activated FGFR2 mutants:PLCG1ArrowR-HSA-5655343 (Reactome)
Activated FGFR2 mutants:PLCG1R-HSA-5655301 (Reactome)
Activated FGFR2 mutants:PLCG1mim-catalysisR-HSA-5655301 (Reactome)
Activated FGFR2 mutants:p-4Y-PLCG1ArrowR-HSA-5655301 (Reactome)
Activated FGFR2 mutants:p-4Y-PLCG1R-HSA-5654748 (Reactome)
Activated FGFR2 mutants:p-FRS2ArrowR-HSA-5655268 (Reactome)
Activated FGFR2 mutants:p-FRS2R-HSA-5655233 (Reactome)
Activated FGFR2 mutants:p-FRS2R-HSA-5655320 (Reactome)
Activated FGFR2 mutantsArrowR-HSA-5654748 (Reactome)
Activated FGFR2 mutantsR-HSA-5655339 (Reactome)
Activated FGFR2 mutantsR-HSA-5655343 (Reactome)
Activated FGFR2:FRS2ArrowR-HSA-5654399 (Reactome)
Activated FGFR2:FRS2R-HSA-5654397 (Reactome)
Activated FGFR2:FRS2R-HSA-5654562 (Reactome)
Activated FGFR2:FRS2mim-catalysisR-HSA-5654397 (Reactome)
Activated FGFR2:FRS3ArrowR-HSA-5654603 (Reactome)
Activated FGFR2:FRS3R-HSA-5654605 (Reactome)
Activated FGFR2:FRS3mim-catalysisR-HSA-5654605 (Reactome)
Activated FGFR2:SHC1ArrowR-HSA-5654404 (Reactome)
Activated FGFR2:SHC1R-HSA-5654407 (Reactome)
Activated FGFR2:SHC1mim-catalysisR-HSA-5654407 (Reactome)
Activated FGFR2ArrowR-HSA-5654157 (Reactome)
Activated FGFR2R-HSA-5654159 (Reactome)
Activated FGFR2R-HSA-5654399 (Reactome)
Activated FGFR2R-HSA-5654404 (Reactome)
Activated FGFR2R-HSA-5654603 (Reactome)
Activated FGFR2b

homodimer bound to

FGF
ArrowR-HSA-190408 (Reactome)
Activated FGFR2b

mutants with enhanced ligand

binding
ArrowR-HSA-2033488 (Reactome)
Activated FGFR2c

homodimer bound to

FGF
ArrowR-HSA-190413 (Reactome)
Activated FGFR2c

mutants with enhanced

ligand-binding
ArrowR-HSA-2033486 (Reactome)
BRAFArrowR-HSA-1295604 (Reactome)
CBLArrowR-HSA-1295621 (Reactome)
CBLR-HSA-1295622 (Reactome)
FGF2,7,10,22R-HSA-5656070 (Reactome)
FGFBP:FGFArrowR-HSA-190260 (Reactome)
FGFBP:FGFArrowR-HSA-5656070 (Reactome)
FGFBPR-HSA-5656070 (Reactome)
FGFR2

ligand-independent

mutant dimers
ArrowR-HSA-2029983 (Reactome)
FGFR2

ligand-independent

mutant dimers
R-HSA-2029984 (Reactome)
FGFR2

ligand-independent

mutant dimers
mim-catalysisR-HSA-2029984 (Reactome)
FGFR2

ligand-independent

mutants
R-HSA-2029983 (Reactome)
FGFR2 mutants:p-FRS2:GRB2:SOS1ArrowR-HSA-5655233 (Reactome)
FGFR2 mutants:p-FRS2:GRB2:SOS1mim-catalysisR-HSA-5655241 (Reactome)
FGFR2 mutant dimers

with enhanced

kinase activity
ArrowR-HSA-2033479 (Reactome)
FGFR2 mutant dimers

with enhanced

kinase activity
R-HSA-2033490 (Reactome)
FGFR2 mutant dimers

with enhanced

kinase activity
mim-catalysisR-HSA-2033490 (Reactome)
FGFR2 mutants with

enhanced kinase

activity
R-HSA-2033479 (Reactome)
FGFR2 point mutant dimers:TKIsArrowR-HSA-2077424 (Reactome)
FGFR2 point mutant dimersR-HSA-2077424 (Reactome)
FGFR2b

mutant-binding

FGFs:FP-1039
ArrowR-HSA-2077421 (Reactome)
FGFR2b mutant-binding FGFsR-HSA-2033474 (Reactome)
FGFR2b mutant-binding FGFsR-HSA-2077421 (Reactome)
FGFR2b homodimer bound to FGFArrowR-HSA-190260 (Reactome)
FGFR2b homodimer bound to FGFR-HSA-190408 (Reactome)
FGFR2b homodimer bound to FGFmim-catalysisR-HSA-190408 (Reactome)
FGFR2b mutant dimers

with enhanced ligand-binding

bound to FGFs
ArrowR-HSA-2033474 (Reactome)
FGFR2b mutant dimers

with enhanced ligand-binding

bound to FGFs
R-HSA-2033488 (Reactome)
FGFR2b mutant dimers

with enhanced ligand-binding

bound to FGFs
mim-catalysisR-HSA-2033488 (Reactome)
FGFR2b mutants with

enhanced ligand

binding
R-HSA-2033474 (Reactome)
FGFR2b-binding FGFsR-HSA-190260 (Reactome)
FGFR2bR-HSA-190260 (Reactome)
FGFR2c homodimer bound to FGFArrowR-HSA-190258 (Reactome)
FGFR2c homodimer bound to FGFR-HSA-190413 (Reactome)
FGFR2c homodimer bound to FGFmim-catalysisR-HSA-190413 (Reactome)
FGFR2c mutant binding FGFsR-HSA-2033472 (Reactome)
FGFR2c mutant dimers

with enhanced ligand-binding

bound to FGFs
ArrowR-HSA-2033472 (Reactome)
FGFR2c mutant dimers

with enhanced ligand-binding

bound to FGFs
R-HSA-2033486 (Reactome)
FGFR2c mutant dimers

with enhanced ligand-binding

bound to FGFs
mim-catalysisR-HSA-2033486 (Reactome)
FGFR2c mutants with

enhanced ligand

binding
R-HSA-2033472 (Reactome)
FGFR2c-binding FGFsR-HSA-190258 (Reactome)
FGFR2cR-HSA-190258 (Reactome)
FP-1039R-HSA-2077421 (Reactome)
FRS2R-HSA-5654399 (Reactome)
FRS2R-HSA-5655339 (Reactome)
FRS3R-HSA-5654603 (Reactome)
GDPArrowR-HSA-5654402 (Reactome)
GDPArrowR-HSA-5654618 (Reactome)
GDPArrowR-HSA-5655241 (Reactome)
GP369R-HSA-2067713 (Reactome)
GRB2-1:SOS1R-HSA-5654406 (Reactome)
GRB2-1:SOS1R-HSA-5654615 (Reactome)
GRB2-1:SOS1R-HSA-5655233 (Reactome)
GRB2-1ArrowR-HSA-1549564 (Reactome)
GRB2-1R-HSA-1295613 (Reactome)
GRB2:GAB1:PIK3R1ArrowR-HSA-177931 (Reactome)
GRB2:GAB1:PIK3R1R-HSA-5654612 (Reactome)
GRB2:GAB1:PIK3R1R-HSA-5654620 (Reactome)
GRB2:GAB1:PIK3R1R-HSA-5655320 (Reactome)
GRB2:GAB1R-HSA-177931 (Reactome)
GTPR-HSA-5654402 (Reactome)
GTPR-HSA-5654618 (Reactome)
GTPR-HSA-5655241 (Reactome)
HSArrowR-HSA-190258 (Reactome)
HSArrowR-HSA-190260 (Reactome)
HSR-HSA-190258 (Reactome)
HSR-HSA-190260 (Reactome)
HSR-HSA-2033472 (Reactome)
HSR-HSA-2033474 (Reactome)
IL17RD-1TBarR-HSA-1268206 (Reactome)
IL17RDTBarR-HSA-1268210 (Reactome)
Overexpressed FGFR2:TKIsArrowR-HSA-2029992 (Reactome)
Overexpressed FGFR2 homodimers:GP369ArrowR-HSA-2067713 (Reactome)
Overexpressed FGFR2 homodimersArrowR-HSA-2029988 (Reactome)
Overexpressed FGFR2 homodimersR-HSA-2029989 (Reactome)
Overexpressed FGFR2 homodimersR-HSA-2029992 (Reactome)
Overexpressed FGFR2 homodimersR-HSA-2067713 (Reactome)
Overexpressed FGFR2 homodimersmim-catalysisR-HSA-2029989 (Reactome)
Overexpressed FGFR2R-HSA-2029988 (Reactome)
PI(3,4,5)P3ArrowR-HSA-5654697 (Reactome)
PI(3,4,5)P3ArrowR-HSA-5654701 (Reactome)
PI(3,4,5)P3ArrowR-HSA-5655323 (Reactome)
PI(3,4,5)P3R-HSA-5654159 (Reactome)
PI(3,4,5)P3R-HSA-5655343 (Reactome)
PI(4,5)P2R-HSA-5654697 (Reactome)
PI(4,5)P2R-HSA-5654701 (Reactome)
PI(4,5)P2R-HSA-5655323 (Reactome)
PIK3CAR-HSA-5654614 (Reactome)
PIK3CAR-HSA-5654622 (Reactome)
PIK3CAR-HSA-5655245 (Reactome)
PIK3R1R-HSA-177931 (Reactome)
PLCG1R-HSA-5654159 (Reactome)
PLCG1R-HSA-5655343 (Reactome)
PP2A (A:C)ArrowR-HSA-1295622 (Reactome)
PP2A(A:C):S112/S121-pSPRY2ArrowR-HSA-934559 (Reactome)
PP2A(A:C):S112/S121-pSPRY2TBarR-HSA-1295609 (Reactome)
PP2A(A:C):SPRY2ArrowR-HSA-1295599 (Reactome)
PP2A(A:C):SPRY2R-HSA-1295609 (Reactome)
PP2A(A:C):SPRY2R-HSA-934559 (Reactome)
PP2A(A:C):Y55/Y227-pSPRY2ArrowR-HSA-1295609 (Reactome)
PP2A(A:C):Y55/Y227-pSPRY2ArrowR-HSA-1549564 (Reactome)
PP2A(A:C):Y55/Y227-pSPRY2R-HSA-1295613 (Reactome)
PP2A(A:C):Y55/Y227-pSPRY2R-HSA-1295622 (Reactome)
PPA2A

(A:C):S112/S115

p-SPRY2
R-HSA-1295632 (Reactome)
PPA2A

(A:C):S112/S115

p-SPRY2
mim-catalysisR-HSA-1295632 (Reactome)
PPA2A (A:C):Y55/Y227 p-SPRY2:GRB2ArrowR-HSA-1295613 (Reactome)
PPA2A (A:C):Y55/Y227 p-SPRY2:GRB2R-HSA-1549564 (Reactome)
PPA2A(A:C):SPRY2ArrowR-HSA-1295632 (Reactome)
PPA2A(A:C):SPRY2R-HSA-1295599 (Reactome)
PTPN11R-HSA-5654608 (Reactome)
PTPN11mim-catalysisR-HSA-1549564 (Reactome)
Phospho-MEKArrowR-HSA-1268206 (Reactome)
PiArrowR-HSA-1295632 (Reactome)
R-HSA-1268206 (Reactome) p-ERK1/2 dissociates from p-MEK1/2, allowing dimerization of the activated MAPKs and translocation to the nucleus. In FGFR signaling, there is evidence that this dissociation event is negatively regulated by the golgi membrane form of IL17RD, preventing the nuclear localization of activated ERK1/2.
R-HSA-1268210 (Reactome) MEK1/2 phosphorylate critical tyrosine and threonine residues on ERK1/2, activating the kinase activity of the MAPKs. In FGFR signaling, this reaction appears to be negatively regulated by IL17RD through an unknown mechanism, limiting the extent of MAPK signaling after FGF stimulation.
R-HSA-1295599 (Reactome) SPRY2 translocates to the plasma membrane upon activation of cells with FGF, and translocation is required for the inhibition of growth factor-stimulated cell migration, proliferation and differentiation. Translocation may be mediated by interactions with PIP2 in the membrane, palmitoylation of the C-terminal region of SPRY2 and/or interactions with caveolin-1.
R-HSA-1295604 (Reactome) MAPK-dependent serine phosphorylation of SPRY2 disrupts complex formation with B-RAF.
R-HSA-1295609 (Reactome) Sprouty 2 protein is phosphorylated on tyrosine residue 55. The ability of SRC kinase to catalyze this reaction has been demonstrated with purified proteins in vitro (Li et al. 2004) and in cultured cells with studies of the effects of SRC-family pharmacological inhibitors and of dominant-negative mutant SRC proteins (Mason et al. 2004). SRC kinase also phosphorylates numerous tyrosine residues in the C terminal region of SPRY2 including Y227, in response to FGF but not EGF stimulation.
R-HSA-1295613 (Reactome) Some evidence suggests that SPRY2 may exert its negative effect by binding to GRB2 and competing with the GRB2:SOS1 interaction that is required for MAPK activation. SPRY2 phosphorylation at Y55 is stimulated in response to both FGF and EGF, and is required for SPRY2 to act as a negative regulator of FGF signaling. Y55 is not thought to be a GRB2 binding site, however. Instead, phosphorylation at Y55 is thought to cause a conformational change in SPRY2 that reveals a cryptic PXXPXPR GRB2-docking site in the C-terminal of SPRY2.
SPRY2 has also been shown to be phosphorylated at multiple tyrosine residues in its C-terminal in response to FGF, but not EGF, stimulation. This phosphorylation, in particular at residue 227, is thought to augment the ability of SPRY2 to inhibit FGF signaling through the MAPK cascade, although the mechanism remains to be elucidated.
R-HSA-1295621 (Reactome) After ubiquitination, CBL dissociates from SPRY2
R-HSA-1295622 (Reactome) The N terminal TKB domain of CBL binds to the phospho-tyrosine 55 of SPRY2, targeting SPRY2 for degradation by the 26S proteasome. Y55 is also a binding site for PP2A, which dephosphorylates numerous serine and threonine residues on SPRY2, allowing a conformational change that may promote a SPRY2:GRB2 interaction and limit the extent of MAPK activation following FGF stimulation.
R-HSA-1295628 (Reactome) After being phosphorylated, p-ERK1/2 dissociate from MEK1/2 and dimerize.
R-HSA-1295632 (Reactome) In unstimulated cells, SPRY2 has been shown to be phosphorylated on multiple serine and threonine residues. In these cells, SPRY2 exists in a complex with the regulatory and catalytic subunits (A and C, respectively) of the serine/threonine phosphatase PP2A. After stimulation with FGF, the catalytic activity of PP2A increases and the phosphatase dephophorylates SPRY at serine 112 and serine 115. This is thought to promote changes in tertiary structure that promote GRB2 binding and phosphorylation of Y55 and Y227.
R-HSA-1295634 (Reactome) Some evidence suggests that SPRY2 can exert its negative role on FGF signaling at the level of RAF activation. Hypophosphorylated SPRY2 binds to inactive B-RAF, preventing it from activating ERK signaling. MAPK activation results in phosphorylation of SPRY2 on six serine residues (S7, S42, S111, S120, S140 and S167), and inhibits B-RAF binding. Phosphorylation at S111 and S120 directly affects B-RAF binding while the remaining four sites appear to contribute indirectly. Oncogenic forms of B-RAF such as B-RAF V600E, which adopt active kinase conformations, do not associate with SPRY2, regardless of its phosphorylation status. This suggests that two mechanisms affect the SPRY2:B-RAF interaction: SPRY2 phosphorylation and B-RAF conformation.
R-HSA-1549564 (Reactome) PPTN11 (also known as SHP2) may exert its positive effects on MAPK activation in response to FGF stimulation by catalyzing the dephosphorylation of tyrosine resides on SPRY2. This dephosphorylation promotes dissociation of the GRB2/SPRY2 complex and as a consequence stimulates GRB2 association with the activated receptor, leading to sustained MAPK signaling.
R-HSA-177931 (Reactome) The Src homology 2 (SH2) domain of the phosphatidylinositol 3-kinase (PIK3) regulatory subunit (PIK3R1, i.e. PI3Kp85) binds to GAB1 in a phosphorylation-independent manner. GAB1 serves as a docking protein which recruits a number of downstream signalling proteins. PIK3R1 can bind to either GAB1 or phosphorylated GAB1.
R-HSA-190258 (Reactome) In this reaction, FGF receptor 2c in the plasma membrane binds an associating extracellular ligand, a requisite step for subsequent activation. The resulting complex consists of dimerized receptor, two ligand molecules, and heparan sulfate. Two isoforms of FGFR2c generated by alternative splicing and differing only by the presence ("long") or absence ("short") of two amino acid residues at positions 428-429 are equally active in ligand binding and dimerization but differ in their abilities to interact with downstream targets.
R-HSA-190260 (Reactome) In this reaction, FGF receptor 2b in the plasma membrane binds an associating extracellular ligand, a requisite step for subsequent activation. The resulting complex consists of dimerized receptor, two ligand molecules, and heparan sulfate. Two isoforms of FGFR2b generated by alternative splicing and differing only by the presence ("long") or absence ("short") of two amino acid residues at positions 428-429 are equally active in ligand binding and dimerization but differ in their abilities to interact with downstream targets.
R-HSA-190408 (Reactome) The intrinsic protein tyrosine kinase activity of the activated FGFR2b receptor leads to multiple phosphorylation events, creating a number of binding sites on its cytoplasmic tail for membrane bound docking proteins to gather intracellular signaling mediators. Two isoforms of FGFR2b generated by alternative splicing and differing only by the presence ("long") or absence ("short") of two amino acid residues at positions 428-429 are equally active in ligand binding and dimerization but differ in their abilities to interact with downstream targets. Based on sequence alignment, FGFR2 contains all 8 of the cytoplasmic tyrosine residues identified in FGFR1.
R-HSA-190413 (Reactome) The intrinsic protein tyrosine kinase activity of the activated FGFR2c receptor leads to multiple phosphorylation events, creating a number of binding sites on its cytoplasmic tail for membrane bound docking proteins to gather intracellular signaling mediators. Two isoforms of FGFR2c generated by alternative splicing and differing only by the presence ("long") or absence ("short") of two amino acid residues at positions 428-429 are equally active in autophosphorylation, but differ in their abilities to interact with downstream targets. Based on sequence alignment, FGFR2 contains all 8 of the cytoplasmic tyrosine residues identified in FGFR1.

R-HSA-2029983 (Reactome) Point mutations in FGFR2 that are thought to promote ligand-independent dimerization in the context of autosomal bone development disorders have also been identified in endometrial, ovarian, gastric and lung cancer (Greenman, 2007; Dutt, 2008; Davies, 2005; Byron, 2008; Byron, 2010, Pollock, 2007). Although functional studies on these mutations in FGFR2 in cancer cell lines is limited - only the S267P mutation identified in gastric cancer has been demonstrated biochemically to undergo ligand-independent dimerization (Anderson, 1998) - characterization of paralogous mutations in FGFR3 as well as in other mutations that create unpaired cysteine residues in FGFR2 support the notion that these mutant receptors undergo aberrant intermolecular disulphide bond formation that results in constitutive activation (Galvin, 1996; Neilson and Friesel,1995; Robertson, 1998; d'Avis, 1998)
R-HSA-2029984 (Reactome) FGFR2 S267P undergoes ligand-independent dimerization, and appears unable to stably bind FGF2 ligand under the conditions examined (Anderson, 1998). FGFR2b S373C and Y376C are paralogous to the FGFR3 S371C and Y373C mutations that are seen in thanatophoric dysplasia I (Rousseau, 1996; Tavormina, 1995a) and which have been shown to undergo spontaneous dimerization in the absence of ligand (d'Avis, 1998; Adar, 2002). Moreover, other FGFR2 mutations that introduce unpaired cysteine residues have been shown to support formation of intermolecular disulphide bonds (Galvin, 1996; Neilson and Friesel, 1995), supporting the notion that the FGFR2b S373C and Y376C mutants may promote spontaneous receptor dimerization and activation.
R-HSA-2029988 (Reactome) Overexpressed FGFR2 in gastric and breast cancer cells has been shown to undergo ligand-independent dimerization (Takeda, 2007; Kunii, 2008; Moffa, 2004; Turner, 2010). Full-length FGFR2 is weakly transforming in NIH 3T3 cells, and is thought to possess a transformation-inhibiting domain in the C-terminus (Itoh, 1994). Interestingly, many cancers with amplifications of FGFR2 show preferrential expression of C-terminally truncated FGFR2 variants, designated C2 and C3, with 788 or 769 residues instead of the wild-type 822 (Hattori, 1990; Itoh, 1994; Ueda, 1999). These variants, which lack a number of carboxy-terminal tyrosine residues, show increased transforming potency compared to the full-length receptor (Cha, 2008; Cha, 2009), and have been shown to be constitutively active and to dimerize spontaneously (Takeda, 2007).
R-HSA-2029989 (Reactome) Amplification of full length FGFR2 is only weakly transforming in NIH 3T3 cells, reflecting the presence of a putative transformation-inhibitory region in the c-terminus of the protein (Itoh, 1994, Cha, 2009). C-terminally truncated variants of FGFR2 that are preferrentially expressed in cancer show more potent transformation potential (Cha, 2008; Cha, 2009). These variants lack a number of carboxy-terminal tyrosine residues, including Y770 and Y773. Loss of Y770 contributes to transformation by enhancing FRS2 binding to the C-terminally truncated variant. This suggests that in the context of the full-length protein the presence of Y770 restricts access of FRS2 to the receptor. Loss or mutation of Y773 impairs internalization and degradation of the receptor and promotes sustained signaling (Cha, 2009). Gastric cancer cell lines with FGFR2 amplifications appear to undergo ligand-independent signaling and are sensitive to inhibition with ATP-competitive inhibitors (Takeda, 2007).


FGFR2 amplifications identified in 4% of triple negative breast cancers have also been shown to be constitutively active and to have elevated levels of phosphorylated FRS2 in the absence of ligand. Consistent with this, shRNA knockdown or chemical inhibition restricts proliferation and induces apoptosis in these cells (Kunii, 2008; Turner, 2010)


R-HSA-2029992 (Reactome) Amplified FGFR2 has been shown to be a potential target for a number of ATP-competitive inhibitors, some of which are currently in clinical trials for therapeutic use (Takeda, 2007; Turner, 2010; http://clinicaltrials.gov).
R-HSA-2033472 (Reactome) Mutations in the highly conserved Pro-Ser dipeptide repeat of FGFR2 have been identified both in Apert syndrome and in endometrial and ovarian cancers (Wilkie, 1995; Dutt, 2008; Pollock, 2007; Byron, 2010). Missense S252W or P253R mutations affect both the 'b' and 'c' isoforms, although mutation in the FGFR2c isoform is believed to be more clinically relevant to the development of Apert syndrome (Lomri, 1998). In the context of endometrial cancer, these mutations are mutually exclusive with KRAS mutations, but are associated at high frequency with PTEN mutations (Byron, 2008). The S252W and P253R mutations allow the receptor to bind to an expanded range of ligands, such that the mesenchymal splice form (FGFR2c) is anomalously activated by the mesenchymal ligands FGF7 and FGF10, establishing an autocrine signaling loop. These mutations also increase the binding affinity for the receptor's normal epithelial ligands 2- to 8-fold (Yu, 2000; Ibrahimi, 2004b). Based on biochemical and crystal studies, the mutations in the IgII-IgIII linker region are predicted to alter the hydrogen bonding network in this region and may change the conformation and thus the ligand-binding properties of the mutant receptors (Stauber, 2000).


R-HSA-2033474 (Reactome) Apert sydrome is the most severe of the craniosynostosis syndromes and results almost entirely from two missense mutations in the conserved Ser252 and Pro253 residues in the IgII-IgIII linker of FGFR2 (Wilkie, 1995). These mutations affect both the 'b' and 'c' isoforms, although mutation in the FGFR2c isoform is believed to be more clinically relevant to the development of Apert syndrome (Lomri, 1998). More recently, the same mutations arising somatically have been identified in endometrial and ovarian cancer (Dutt, 2008; Byron, 2008; Pollock, 2007).


The IgII and IgIII domains and the intervening linker of the FGF receptor constitute a binding site for FGFs (Chellaiah, 1999; Stauber, 2000; Plotnikov, 1999). The epithelial isoform FGFR2b binds only to mesenchymally expressed ligands including FGF7 and FGF10 and does not respond to epithelial ligands FGF2, 4, 6, 8 and 9 (Ornitz, 1996). Introduction of the P252W and P252R mutations into FGFR2b allows the aberrant binding and activation by the epithelially expressed ligands FGF 2, 6 and 9, establishing an autocrine signaling loop in epithelial cells. These mutations also increase the binding affinity for the receptor's normal mesenchymal ligands 2- to 8-fold (Yu, 2000; Ibrahimi, 2004b). Based on biochemical and crystal studies, the mutations in the IgII-IgIII linker region are predicted to alter the hydrogen bonding network in this region and may change the conformation and thus the ligand-binding properties of the mutant receptors (Stauber, 2000).

R-HSA-2033479 (Reactome) Several missense mutations in the tyrosine kinase domain of FGFR2 have been identified in Crouzon syndrome and similar craniosynostosis disorders (Kan, 2002; Cunningham, 2007). The N549H and K660N mutations are paralogous to FGFR3 N540K and K650N/E mutations identified in hypochondroplasia and thanatophoric dysplasia II (Bellus, 2000). In FGFR3, these mutations have been demonstrated to have weak ligand-independent autophosphorylation and enhanced kinase activity mediated by disruption of a hydrogen-bonding network that holds the receptor in an inactive conformation (Chen, 2007; Bellus, 2000, Raffioni, 1998). Due to the highly conserved nature of these residues across all four FGF receptors, it is generally believed that these germline mutations in FGFR2 are also activating, though this remains to be demonstrated experimentally.


As further support of this notion, activating point mutations in the kinase domain of FGFR2 have also been identified in endometrial, uterine and cervical cancers (Pollock, 2007; Dutt, 2008), and in some cases have been shown to have enhanced kinase activity and to support anchorage-independent growth in NIH 3T3 cells (Dutt, 2008). Knockdown of N549K with short hairpin RNAs or the pan-FGFR inhibitor PD170734 inhibits cell survival in endometrial cancer cells lines, suggesting that FGFR2 activity is required for tumor cell survival (Dutt, 2008; Byron, 2008). Kinase-domain mutants show elevated levels of activity relative to the wild-type even in the absence of receptor phosphorylation, and although their kinase activity is further enhanced upon trans-autophosphorylation, the extent of this is less than that seen in the wild-type, suggesting that the mutant alleles are capable of of supporting ligand-independent activation (Chen, 2007)

R-HSA-2033486 (Reactome) After aberrantly dimerizing in response to mesenchymally expressed ligands, FGFR2c S252W and P253R mutants are assumed to undergo transautophosphorylation analagous to the wild-type receptor, although this has not been explicitly demonstrated. Knock-down or chemical inhibition of other FGFR2-activating mutations identified in endometrial cancer cells has been shown to cause cell death (Byron, 2008).
R-HSA-2033488 (Reactome) After aberrantly dimerizing in response to epithelially expressed ligands, FGFR2b S252W and P253R mutants are assumed to undergo transautophosphorylation analagous to both the wild-type receptor, although this has not been explicitly demonstrated. Transformation of NIH 3T3 cells with the FGFR2b S252W mutant confers anchorage independent growth and results in increased phosphorylation of FRS2 in a manner that depends on a functional kinase domain (Dutt, 2008). Knock-down or chemical inhibition of other FGFR2-activating mutations identified in endometrial cancer cells has been shown to cause cell death (Byron, 2008).


R-HSA-2033490 (Reactome) Several missense mutations in the tyrosine kinase domain of FGFR2 have been identified in Crouzon syndrome and similar craniosynostosis disorders (Kan, 2002; Cunningham, 2007). The N549H and K660N mutations identified in FGFR2 in craniosynostosis disorders are paralogous to FGFR3 N540K and K650N/E mutations identified in hypochondroplasia and thanatophoric dysplasia II (Bellus, 2000). In FGFR3, these mutations have been demonstrated to have weak ligand-independent autophosphorylation and enhanced kinase activity mediated by disruption of a hydrogen-bonding network that holds the receptor in an inactive conformation (Chen, 2007; Bellus, 2000, Raffioni, 1998).

Characterization of FGFR2 proteins containing somatic mutations at these residues support the notion that they have elevated levels of kinase activity. FRS2 is constitutively phosphorylated in the FGFR2 N549K kinase mutant identified in endometrial tumors and knockdown of N549K with short hairpin RNAs or the pan-FGFR inhibitor PD170734 inhibits cell survival in endometrial cancer cells lines, suggesting that FGFR2 activity is required for tumor cell survival. FGFR2 knockdown also results in a significant decrease in the levels of phosphorylated Erk1/2 (Dutt, 2008; Byron, 2008; Pollock, 2007). Crystal structures of FGFR2 kinase mutants N549H and K650N show that the mutations disengage an 'auto-inhibitory brake' on the kinase domain of the receptor. Biochemically, the FGFR2 N549K and K660E mutants show elevated kinase activity relative to the unphosphorylated wild-type protein and have increased activity towards peptide substrates; this activity is stimulated upon receptor phosphorylation, but to a lesser extent than seen with the wild-type receptor (Chen, 2007).
R-HSA-2067713 (Reactome) Treatment of FGFR2-amplified gastric and breast cancer cell lines with the antibody GP369 inhibits FGFR2 phosphorylation and downstream signaling and suppresses cell proliferation. Treatment of mice with GP369 inhibits the growth of human cancer xenografts carrying activating FGFR2 mutations. The GP369-binding epitope is contained in the ligand-binding region of the receptor, suggesting that the antibody works by disrupting the ligand-dependent activation of amplified FGFR2 (Bai, 2010).
R-HSA-2077421 (Reactome) FP-1039 is a soluble fusion protein consisting of the extracellular region of FGFR1c bound to the Fc region of human IgG1. It is capable of binding to a wide range of FGF ligands and thereby prevents activation of multiple FGF receptors. FP-1039 is in Phase I clinical trials in solid malignancies and in Phase II trials for patients with endometrial cancers harbouring the activating mutations S252W and P253R (reviewed in Wesche, 2011).
R-HSA-2077424 (Reactome) FGFR2 is inhibited by a range of in vitro tyrosine kinase inhibitors, including PD170734 and SU5402 (reviewed in Greulich and Pollock, 2010; Wesche, 2011). In addition, there are a number of FGFR2 inhibitors currently in clinical trials that for treatment of solid malignancies (http://ClinicalTrials.gov).
R-HSA-5654147 (Reactome) PLC gamma is phosphorylated by activated FGFR, resulting in PLC gamma activation, stimulation of phosphatidyl inositol hydrolysis and generation of two second messengers, diacylglycerol and inositol (1,4,5) P3. Tyrosine phosphorylation of PLCgamma by FGFR4 is weaker than that seen by other isoforms of FGFR.
R-HSA-5654157 (Reactome) Dissociation from the activated receptor quickly follows phosphorylation of PLC-gamma. Phosphorylated PLC-gamma catalyzes the hydrolysis of phosphatidylinositol(4, 5)bisphosphate to generate two second messengers, diacylglycerol and inositol (1,4,5) triphosphate.
R-HSA-5654159 (Reactome) Recruitment of PLC-gamma by FGF receptors has been best studied in FGFR1c signaling, where it has been shown that autophosphorylation of Tyr766 in the C-terminal tail of FGFR1c creates a specific binding site for the SH2 domain of PLC-gamma. A mutant FGFR1c in which Y766 is replaced by phenylalanine is unable to activate PI hydrolysis and Ca2+ release in response to FGF stimulation. Membrane recruitment of PLC-gamma is also aided by binding of the Pleckstrin homology (PH) domain of this enzyme to PtIns(3,4,5) P3 molecules that are generated in response to PI-3 kinase stimulation. By sequence comparison, Y766 is conserved in all FGFR isoforms, and PLC-gamma signaling is observed, to a greater or lesser extent, downstream of all FGFR receptors upon stimulation with FGFs.
R-HSA-5654397 (Reactome) FRS2 (also known as FRS alpha is activated through tyrosine phosphorylation catalyzed by the protein kinase domain of the activated FGFR. FRS2 contains four binding sites for the adaptor protein GRB2 at residues Y196, Y306, Y349 and Y392, and two binding sites for the protein tyrosine phosphatase PPTN11/SHP2 at residues Y436 and Y471. Different FGFR isoforms may generate different phosphorylation patterns on FRS2 leading to alternate downstream signaling.
R-HSA-5654399 (Reactome) FRS2 (also known as FRS2alpha) is broadly expressed in adult and fetal tissues. Membrane-bound FRS2 interacts with FGFR as a first step in the phosphorylation of this docking protein. The juxtamembrane binding site for FRS2 does not contain tyrosine, so binding may be independent of receptor activation and/or constitutive. Activation of the FGFR receptor is required for FRS2 phosphorylation and subsequent recruitment of downstream effectors.
R-HSA-5654402 (Reactome) SOS, recruited by GRB2:p-FRS2 to activated FGFR, activates RAS nucleotide exchange from the inactive GDP-bound to the active GTP-bound state.
R-HSA-5654404 (Reactome) Although a role for SHC1 in FGF signalling has been implicated in many studies, it is not clear that SHC1 interacts directly with the receptor.
R-HSA-5654406 (Reactome) Phosphorylated SHC1 links FGFR to Grb2 (Klint et al. 1995) leading to the formation of a signaling complex including Shc, Grb2 and Sos. Transformation of NIH 3T3 cells with v-Src produced a strong constitutive association of FGFR1 with Shc, Grb2 and Sos (Curto et al. 1998) suggesting Src involvement. Recruitment of Grb2-Sos links FGFR to the Ras pathway.
R-HSA-5654407 (Reactome) The p46 and p53 isoforms of SHC1 have been shown to be phosphorylated upon FGF stimulation. Three consensus RTK phosphoryation sites are present in SHC1, although phosphorylation of these specific tyrosine residues has not been explicitly demonstrated in response to FGF stimulation. In contrast, the p66 isoform of SHC1 does not appear to undergo FGF-dependent phosphorylation.
R-HSA-5654562 (Reactome) FRS2 has 8 canonical MAPK phosphorylation sites which are phosphorylated by activated ERK1/2 after FGF stimulation. Phosphorylation of these 8 threonine residues counteracts the activating effect of tyrosine phosphorylation of FRS2, although the exact mechanism for this negative regulation is not known. Expression of a version of FRS2 in which the 8 threonine residues are mutated to valine results in enhanced tyrosine phosphorylation of FRS2, enhanced GRB2-SOS1 recruitment and a more sustained MAPK response. The 8 threonine residues are not conserved in FRS3; as a result, signaling through FRS3 complexes do not appear to be subject to this downregulation.
R-HSA-5654603 (Reactome) FRS3 (also known as FRS2beta) is predominantly expressed in the developing and adult neuroepithelium. As is the case for FRS2 (also known as FRS2alpha), binding of FRS3 to FGFR may be constitutive and/or independent of receptor activation. Elements of the downstream signaling mediated by the two FRS family members appear to be at least partially conserved, as FRS3 is phosphorylated upon FGF stimulation, binds PPTN11/SHP2 and GRB2 and results in ERK activation. Moreover, expression of FRS3 in FRS2-/- MEFs restores ERK activation.
R-HSA-5654605 (Reactome) FRS3 (also known as FRS2 beta) is activated through tyrosine phosphorylation catalyzed by the protein kinase domain of the activated FGFR. By sequence comparison, FRS3 has the 2 PPTN11/SHP2-binding sites and has three of the four GRB2-binding sites.
R-HSA-5654607 (Reactome) Tyrosine phosphorylation of PPTN11/SHP2 by FGFR kinase is required for activation of the phosphatase activity of PPTN11 and for downstream signaling. Tyrosine phosphorylated PPTN11 plays a major role in the activation of RAS-MAP kinase pathway, although the precise role is not yet clear.
R-HSA-5654608 (Reactome) p-FRS2 has two PPTN11/SHP2-binding sites at pY436 and pY471.
R-HSA-5654612 (Reactome) The direct GRB2-binding sites of FRS2 have a major role in activation of the PI3K pathway.
R-HSA-5654614 (Reactome) The 110 kDa catalytic subunit (PIK3CA) binds to the 85 kDa regulatory subunit (PIK3R1) to create the active PIK3.
R-HSA-5654615 (Reactome) Tyrosine phosphorylated FRS2 recruits GRB2:SOS1 complex by means of the SH3 domain of GRB2, leading to RAS-MAP kinase activation. The FRS2:GRB2-mediated pathway plays a minor role in the activation of RAS-MAP kinase pathway compared to that mediated by FRS2:PPTN11.
R-HSA-5654618 (Reactome) SOS, recruited by GRB2:p-FRS2 to activated FGFR, activates RAS nucleotide exchange from the inactive GDP-bound to the active GTP-bound state.
R-HSA-5654620 (Reactome) p-PPTN11 recruits GRB2-GAB1 to the activated receptor.
R-HSA-5654622 (Reactome) The 110 kDa catalytic subunit (PIK3CA) binds to the 85 kDa regulatory subunit (PIK3R1) to create the active PIK3.
R-HSA-5654677 (Reactome) Grb2 bound to tyrosine phosphorylated FRS2 forms a ternary complex with Cbl through the binding of the SH3 domains of Grb2 to a proline rich region in Cbl. Grb2-mediated recruitment of Cbl results in ubiquitination of FGFR and FRS2. Cbl is a multidomain protein that posses an intrinsic ubiquitin ligase activity and also functions as a platform for recruitment of a variety of signaling proteins. Multiple mechanisms appear to be required for downregulation of FGFR, as internalization of the receptor is reduced but not abolished if recruitment of CBL to FRS2 is compromised by mutation of GRB2-binding sites.
R-HSA-5654697 (Reactome) Once recruited to the activated receptor, PI3K phosphorylates PIP2 to PIP3, leading to activation of AKT signaling. PI3K signaling has been demonstrated in ZMYM2-, FOP- and BCR-FGFR1 fusions (Chen, 2004; Demiroglu, 2001; Guasch, 2001), as well as downstream of a number of other FGFR mutants (see for instance, Byron, 2008; Kunii, 2008; Agazie, 2003; Takeda, 2007).
R-HSA-5654701 (Reactome) Once recruited to the membrane, PI3K catalyzes the phosphorylation of PI(4,5)P2 to PI(3,4,5)P3.
R-HSA-5654729 (Reactome) The ubiquitin ligase CBL exists in a complex with GRB2 and is recruited to tyrosine-phosphorylated FRS2 after FGF stimulation. In addition to promoting the ubiquitination, endocytosis, and degradation of the activated receptor complex, recruitment of the p-CBL:GRB2 complex seems to attenuate FGFR signaling by competing with GRB2:SOS1 for binding to the direct GRB2-binding sites on p-FRS2.
R-HSA-5654748 (Reactome) Dissociation from the activated receptor quickly follows phosphorylation of PLC-gamma. Phosphorylated PLC-gamma catalyzes the hydrolysis of phosphatidylinositol(4, 5)bisphosphate to generate two second messengers, diacylglycerol and inositol (1,4,5) triphosphate.
R-HSA-5655233 (Reactome) Activation of FGFR mutants has in some cases been shown to result in phosphorylation of both FRS2 (also known as FRS2alpha) and ERK1/2, suggesting activation of the MAPK pathway through wild-type like recruitment of the GRB2-SOS1 complex (reviewed in Wesche, 2011; see for instance, Weiss, 2010; Dutt, 2011; Raffioni, 1998; Hart, 2000).
R-HSA-5655241 (Reactome) Activation of Erk1/2 downstream of FGFR mutants suggests that, as is the case for WT FGFR, FGFR mutant-associated SOS1 activates RAS nucleotide exchange from the inactive GDP-bound to the active GTP-bound state (see for instance, Weiss, 2010; Dutt, 2011; Raffioni, 1998; Cha, 2009; Hart, 2000; Turner, 2010; Kunii, 2008; Byron, 2008; Roidl, 2010; Chesi, 2001; Ronchetti, 2001; reviewed in Wesche, 2011).
R-HSA-5655245 (Reactome) Activation of the PI3K pathway has been demonstrated downstream of a number of FGFR mutants (reviewed in Wesche, 2001; see for instance, Agazie, 2003; Kunii, 2008; Takeda, 2007; Chen, 2004; Demiroglu, 2001; Guasch, 2001; Byron, 2008), and is presumed to occur in a manner analogous to the wild-type receptor.
R-HSA-5655268 (Reactome) After recruitment to activated FGFR mutants, FRS2 is believed to be phosphorylated, potentially on all 6 of the tyrosines phosphorylated by wild-type FGFRs. Phosphorylation of FRS2 by FGFR has been demonstrated in some cases (see for instance Qing, 2009; Bai, 2010; Ahmed, 2008; Raffioni, 1998) and is inferred to occur in others based on activation of downstream signaling modules (reviewed in Wesche, 2011; Turner and Grose, 2010).
R-HSA-5655301 (Reactome) By analogy with the wild-type pathway, PLC-gamma is presumed to be phosphorylated by activated FGFR mutants, resulting in PLC-gamma activation, stimulation of phosphatidyl inositol hydrolysis and generation of two second messengers, diacylglycerol and inositol (1,4,5) P3.
R-HSA-5655320 (Reactome) FGFR1-amplified cells derived from lung cancer patients show phosphorylation of AKT and S6, demonstrating the activation of the PI3K signaling pathway in these lines. Inhibition of FGFR1 phosphorylation by treatment with the in vitro reagent PD173074 did not abrogate the phosphorylation of these substrates, however, indicating that the PI3K pathway is not the major signaling pathway activated by amplified FGFR1 (Weiss, 2010; Dutt, 2011). Activation of the PI3K pathway has also been demonstrated downstream of other FGFR mutants (see for instance, Agazie, 2003; Kunii, 2008, Takeda, 2007; Byron, 2008; Demiroglu, 2001; Guasch, 2001; Chen, 2004); however not all mutants activate the PI3K pathway to the same extent and in the case of the rhabdomyosarcoma FGFR4 mutants K535 and E550, phosphorylation of AKT is actually reduced compared to wild-type signaling (Taylor, 2009).
R-HSA-5655323 (Reactome) Once recruited to the activated receptor, PI3K phosphorylates PIP2 to PIP3, leading to activation of AKT signaling. PI3K signaling has been demonstrated in ZMYM2-, FOP- and BCR-FGFR1 fusions (Chen, 2004; Demiroglu, 2001; Guasch, 2001), as well as downstream of a number of other FGFR mutants (see for instance, Byron, 2008; Kunii, 2008; Agazie, 2003; Takeda, 2007).
R-HSA-5655339 (Reactome) After activation, FGFR mutants are presumed to recruit FRS2 (also known as FRS2alpha). This has been demonstrated in some cases (see for instance Ahmed, 2008; Weiss, 2010; Dutt, 2008; Dutt, 2011; Cha, 2009; Qing, 2009; Bai, 2010 ) and is inferred to occur in others by analogy with the wild-type receptor.
R-HSA-5655343 (Reactome) Although it has not been rigourously established, there is some evidence that PLC-gamma signaling may be activated after autophosphorylation of some FGFR mutants, analagous to the wild type receptor (see for instance, Hart, 2000; Chen, 2005; Cha, 2008; di Martino, 2009; Gartside, 2009; Cross, 2000; Hatch, 2006). The extent to which each of the mutants activates this pathway and to which proliferation and tumorigenesis relies on PLC-gamma dependent signaling, remains to be more firmly established.
R-HSA-5656070 (Reactome) Fibroblast growth factor binding proteins (FGFBPs) are extracellular proteins that bind to FGFs and extract them from the extracellular matrix, thereby increasing their mitogenic potential (Wu et al, 1991; Tassi et al, 2001; Beer et al, 2005; reviewed in Abuharbeid et al, 2005). FGFBP1 has been shown to bind to FGF1, 2, 7, 10 and 22 by co-immunoprecipitation and enhances the proliferation of FGFR2b-expressing cells in response to ligand stimulation (Tassi et al, 2001; Beer et al, 2005). FGFBP expression is upregulated in some cancers and contributes to tumor growth and angiogenesis (reviewed in Abuharbeid et al, 2005).
R-HSA-934559 (Reactome) In humans, the phosphorylated MNK1 kinase phosphorylates the adaptor protein Sprouty2 on Ser112 and Ser121, and also at some other serine and threonine residues. MNK1 appears not to form a complex with Sprouty2. Some of these (including the two main sites mentioned above) conform to the serine-containing consensus sites for phosphorylation by MNK1 kinase (K/R-X-X-S, R-X-S). It appears that serine phosphorylation is required to protect Sprouty2 from degradation.

In the absence of serine phosphorylation, phosphorylation of Tyr55 and subsequent binding to E3 ubiquitin ligase, CBL, is enhanced. Serine phosphorylation of Sprouty2 appears to stabilise the protein by interfering with its potential phosphorylation of Tyr55 (Sprouty2 appears to be a poor substrate for c-Src kinase) in response to growth factor stimulation.
R-HSA-934604 (Reactome) In humans, the phosphorylated adaptor protein Sprouty2 is ubiquitinated by the E3 ubiquitin ligase CBL, marking it for degradation by the 26S proteasome.
S111/S120 p-SPRY2:B-RAFArrowR-HSA-1295634 (Reactome)
S111/S120 p-SPRY2:B-RAFR-HSA-1295604 (Reactome)
SHC1 p46,p52R-HSA-5654404 (Reactome)
SPRY2:B-RAFR-HSA-1295634 (Reactome)
SRC-1mim-catalysisR-HSA-1295609 (Reactome)
Tyrosine kinase

inhibitors of

overexpressed FGFR2
R-HSA-2029992 (Reactome)
Tyrosine kinase

inhibitors of FGFR2

mutants
R-HSA-2077424 (Reactome)
Ub-(Y55/Y227)p-SPRY2ArrowR-HSA-1295621 (Reactome)
Ub-Activated FGFR2 complex:Ub-p-FRS2ArrowR-HSA-5654677 (Reactome)
Ub:Y55/Y227-pSPRY2:CBLArrowR-HSA-934604 (Reactome)
Ub:Y55/Y227-pSPRY2:CBLR-HSA-1295621 (Reactome)
UbR-HSA-5654677 (Reactome)
UbR-HSA-934604 (Reactome)
Y55/Y227-pSPRY2:CBLArrowR-HSA-1295622 (Reactome)
Y55/Y227-pSPRY2:CBLR-HSA-934604 (Reactome)
Y55/Y227-pSPRY2:CBLmim-catalysisR-HSA-934604 (Reactome)
activated FGFR2:PLCG1ArrowR-HSA-5654159 (Reactome)
activated FGFR2:PLCG1R-HSA-5654147 (Reactome)
activated FGFR2:PLCG1mim-catalysisR-HSA-5654147 (Reactome)
activated FGFR2:p-4Y-PLCG1ArrowR-HSA-5654147 (Reactome)
activated FGFR2:p-4Y-PLCG1R-HSA-5654157 (Reactome)
p-4Y-PLCG1ArrowR-HSA-5654157 (Reactome)
p-4Y-PLCG1ArrowR-HSA-5654748 (Reactome)
p-MEK:ERKR-HSA-1268210 (Reactome)
p-MEK:ERKmim-catalysisR-HSA-1268210 (Reactome)
p-MEK:p-ERKArrowR-HSA-1268210 (Reactome)
p-MEK:p-ERKR-HSA-1268206 (Reactome)
p-S111,S120-SPRY2ArrowR-HSA-1295604 (Reactome)
p-T,Y MAPK dimersArrowR-HSA-1295628 (Reactome)
p-T,Y MAPK dimersArrowR-HSA-1295634 (Reactome)
p-T,Y MAPK dimersmim-catalysisR-HSA-5654562 (Reactome)
p-T,Y MAPKsArrowR-HSA-1268206 (Reactome)
p-T,Y MAPKsR-HSA-1295628 (Reactome)
p-T250,T255,T385,S437-MKNK1mim-catalysisR-HSA-934559 (Reactome)
p-Y371-CBL:GRB2R-HSA-5654729 (Reactome)
p21 RAS:GDPR-HSA-5654402 (Reactome)
p21 RAS:GDPR-HSA-5654618 (Reactome)
p21 RAS:GDPR-HSA-5655241 (Reactome)
p21 RAS:GTPArrowR-HSA-5654402 (Reactome)
p21 RAS:GTPArrowR-HSA-5654618 (Reactome)
p21 RAS:GTPArrowR-HSA-5655241 (Reactome)
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