DAP12 interactions (Homo sapiens)
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History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
ADP | Metabolite | CHEBI:16761 (ChEBI) | |
ATP | Metabolite | CHEBI:15422 (ChEBI) | |
B2M | Protein | P61769 (Uniprot-TrEMBL) | |
BTK | Protein | Q06187 (Uniprot-TrEMBL) | |
BTK | Protein | Q06187 (Uniprot-TrEMBL) | |
CD300E | Protein | Q496F6 (Uniprot-TrEMBL) | |
CD300E | Protein | Q496F6 (Uniprot-TrEMBL) | |
CD300LB | Protein | A8K4G0 (Uniprot-TrEMBL) | |
CD300LB | Protein | A8K4G0 (Uniprot-TrEMBL) | |
CD94
NKG2C HLA-E | Complex | REACT_148009 (Reactome) | |
CLEC5A | Protein | Q9NY25 (Uniprot-TrEMBL) | |
CLEC5A | Protein | Q9NY25 (Uniprot-TrEMBL) | |
CLM7 DAP12 | Complex | REACT_147946 (Reactome) | |
DAG and IP3 signaling | Pathway | WP2688 (WikiPathways) | This pathway describes the generation of DAG and IP3 by the PLCgamma-mediated hydrolysis of PIP2 and the subsequent downstream signaling events. |
DAP12
KIR2DS1 HLA-Cw4 | Complex | REACT_148039 (Reactome) | |
DAP12 NKG2D | Complex | REACT_148626 (Reactome) | |
DAP12 NKp44 | Complex | REACT_148302 (Reactome) | |
DAP12 TRIM2 | Complex | REACT_19597 (Reactome) | |
DAP12 Receptors
p-DAP12 p-6Y-SYK PI3K | Complex | REACT_148439 (Reactome) | |
DAP12 Receptors
p-DAP12 p-6Y-SYK | Complex | REACT_148137 (Reactome) | |
DAP12 dimer MDL-1 | Complex | REACT_148533 (Reactome) | |
DAP12 dimer TRIM1 | Complex | REACT_148539 (Reactome) | |
DAP12 dimer | Complex | REACT_147960 (Reactome) | |
DAP12 receptors DAP12 dimer | Complex | REACT_147923 (Reactome) | |
DAP12 receptors
p-DAP12 SYK | Complex | REACT_148179 (Reactome) | |
DAP12 receptors p-Y91,Y102-DAP12 dimer | Complex | REACT_148548 (Reactome) | |
FYN,LCK | Protein | REACT_148414 (Reactome) | |
FYN | Protein | P06241 (Uniprot-TrEMBL) | |
GADS SLP76 | Complex | REACT_147999 (Reactome) | |
GDP | Metabolite | CHEBI:17552 (ChEBI) | |
GDP | Metabolite | CHEBI:17552 (ChEBI) | |
GRAP2 | Protein | O75791 (Uniprot-TrEMBL) | |
GRB2-1 | Protein | P62993-1 (Uniprot-TrEMBL) | |
GTP | Metabolite | CHEBI:15996 (ChEBI) | |
GTP | Metabolite | CHEBI:15996 (ChEBI) | |
HLA class I histocompatibility antigen, Cw-3 alpha chain precursor | Protein | P04222 (Uniprot-TrEMBL) | |
HLA class I histocompatibility antigen, Cw-4 alpha chain precursor | Protein | P30504 (Uniprot-TrEMBL) | |
HLA class I histocompatibility antigen, E alpha chain precursor | Protein | P13747 (Uniprot-TrEMBL) | |
HLA-Bw4
KIR3DS1 DAP12 dimer KIR3DS1 HLA-Bw4 | Complex | REACT_147965 (Reactome) | |
HLA-C Cw4/Cw3
KIR2DS4 DAP12 dimer KIR2DS4 HLA-C Cw3/Cw4 | Complex | REACT_148211 (Reactome) | |
HLA-C1
KIR2DS2 DAP12 dimer KIR2DS2 HLA-C1 | Complex | REACT_148637 (Reactome) | |
HLA-E
CD94 NKG2C DAP12 | Complex | REACT_148264 (Reactome) | |
HRAS | Protein | P01112 (Uniprot-TrEMBL) | |
IREM2 DAP12 | Complex | REACT_148241 (Reactome) | |
KIR2DS1 oligomer HLA-C | Complex | REACT_148177 (Reactome) | |
KIR2DS2 HLA-C1 | Complex | REACT_148175 (Reactome) | |
KIR2DS2 | Protein | P43631 (Uniprot-TrEMBL) | |
KIR2DS4 HLA-C Cw4/HLA-C Cw3 | Complex | REACT_148272 (Reactome) | |
KIR2DS4 | Protein | P43632 (Uniprot-TrEMBL) | |
KIR2DS5
DAP12 dimer KIR2DS5 | Complex | REACT_148570 (Reactome) | |
KIR2DS5 | Protein | Q14953 (Uniprot-TrEMBL) | |
KIR2DS5 | Protein | Q14953 (Uniprot-TrEMBL) | |
KIR3DS1 HLA-Bw4 | Complex | REACT_148492 (Reactome) | |
KIR3DS1 | Protein | Q14943 (Uniprot-TrEMBL) | |
KLRC2 | Protein | P26717 (Uniprot-TrEMBL) | |
KLRD1 | Protein | Q13241 (Uniprot-TrEMBL) | |
KLRK1 | Protein | P26718 (Uniprot-TrEMBL) | |
KRAS | Protein | P01116 (Uniprot-TrEMBL) | |
LAT-2 | Protein | O43561-2 (Uniprot-TrEMBL) | |
LCK | Protein | P06239 (Uniprot-TrEMBL) | |
LCP2 | Protein | Q13094 (Uniprot-TrEMBL) | |
NCR2 | Protein | O95944 (Uniprot-TrEMBL) | |
NCR2 | Protein | O95944 (Uniprot-TrEMBL) | |
NKG2D dimer | Complex | REACT_148030 (Reactome) | |
NRAS | Protein | P01111 (Uniprot-TrEMBL) | |
PI3K | Complex | REACT_4240 (Reactome) | |
PI | Metabolite | CHEBI:16618 (ChEBI) | |
PI | Metabolite | CHEBI:18348 (ChEBI) | |
PIK3CA | Protein | P42336 (Uniprot-TrEMBL) | |
PIK3CB | Protein | P42338 (Uniprot-TrEMBL) | |
PIK3R1 | Protein | P27986 (Uniprot-TrEMBL) | |
PIK3R2 | Protein | O00459 (Uniprot-TrEMBL) | |
PIP3 activates AKT signaling | Pathway | WP2653 (WikiPathways) | 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. |
PLC gamma1/2 | Protein | REACT_120292 (Reactome) | |
PLCG1 | Protein | P19174 (Uniprot-TrEMBL) | |
PLCG2 | Protein | P16885 (Uniprot-TrEMBL) | |
RAC1 | Protein | P63000 (Uniprot-TrEMBL) | |
RAC1-GDP | Complex | REACT_22018 (Reactome) | |
RAC1-GTP | Complex | REACT_21594 (Reactome) | |
RAF/MAP kinase cascade | Pathway | WP2735 (WikiPathways) | The MAP kinase cascade describes a sequence of phosphorylation events involving serine/threonine-specific protein kinases. Used by various signal transduction pathways, this cascade constitutes a common 'module' in the transmission of an extracellular signal into the nucleus. |
SIGLEC14 | Protein | Q08ET2 (Uniprot-TrEMBL) | |
SIGLEC14/15/16 DAP12 dimer | Complex | REACT_148587 (Reactome) | |
SIGLEC14/15/16 | Protein | REACT_148032 (Reactome) | |
SIGLEC15 | Protein | Q6ZMC9 (Uniprot-TrEMBL) | |
SIGLEC16 | Protein | A6NMB1 (Uniprot-TrEMBL) | |
SIRP beta1 DAP12 | Complex | REACT_24726 (Reactome) | |
SIRPB1 | Protein | O00241 (Uniprot-TrEMBL) | |
SOS1 | Protein | Q07889 (Uniprot-TrEMBL) | |
SYK | Protein | P43405 (Uniprot-TrEMBL) | |
SYK | Protein | P43405 (Uniprot-TrEMBL) | |
TREM1 | Protein | Q9NP99 (Uniprot-TrEMBL) | |
TREM1 | Protein | Q9NP99 (Uniprot-TrEMBL) | |
TREM2 | Protein | Q9NZC2 (Uniprot-TrEMBL) | |
TREM2 | Protein | Q9NZC2 (Uniprot-TrEMBL) | |
TYROBP | Protein | O43914 (Uniprot-TrEMBL) | |
TYROBP | Protein | O43914 (Uniprot-TrEMBL) | |
VAV2 | Protein | P52735 (Uniprot-TrEMBL) | |
VAV2/VAV3 | Protein | REACT_148397 (Reactome) | |
VAV3 | Protein | Q9UKW4 (Uniprot-TrEMBL) | |
class I MHC B38 | Protein | Q95365 (Uniprot-TrEMBL) | |
p-4Y-PLCG1 | Protein | P19174 (Uniprot-TrEMBL) | |
p-4Y-PLCG2 | Protein | P16885 (Uniprot-TrEMBL) | |
p-5Y-LAT
GRB2 SOS GADS p-3Y-SLP-76 p-2Y-BTK VAV p-PLCG | Complex | REACT_148036 (Reactome) | |
p-5Y-LAT
GRB2 SOS GADS p-3Y-SLP-76 p-2Y-BTK VAV | Complex | REACT_148222 (Reactome) | |
p-5Y-LAT
GRB2 SOS1 GADS p-3Y-SLP-76 PLCG VAV p-Y223,Y551-BTK | Complex | REACT_148538 (Reactome) | |
p-5Y-LAT
GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG VAV BTK PIP3 | Complex | REACT_148541 (Reactome) | |
p-5Y-LAT
PLCG1 GADS p-3Y-SLP-76 BTK p-VAV | Complex | REACT_147977 (Reactome) | |
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS SLP76 PLCG | Complex | REACT_148415 (Reactome) | |
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS SLP76 | Complex | REACT_148283 (Reactome) | |
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG | Complex | REACT_147980 (Reactome) | |
p-5Y-LAT
p-SHC1 GRB2 SOS1 | Complex | REACT_148348 (Reactome) | |
p-5Y-LAT-2 | Protein | O43561-2 (Uniprot-TrEMBL) | |
p-5Y-LAT-2 | Protein | O43561-2 (Uniprot-TrEMBL) | |
p-6Y-SYK | Protein | P43405 (Uniprot-TrEMBL) | |
p-PLCG | Protein | REACT_160705 (Reactome) | |
p-SHC1
GRB2 SOS | Complex | REACT_160377 (Reactome) | |
p-SYK/p-BTK | Complex | REACT_148438 (Reactome) | |
p-Y113,Y128,Y145-LCP2 | Protein | Q13094 (Uniprot-TrEMBL) | |
p-Y172-VAV2 | Protein | P52735 (Uniprot-TrEMBL) | |
p-Y173-VAV3 | Protein | Q9UKW4 (Uniprot-TrEMBL) | |
p-Y223,Y551-BTK | Protein | Q06187 (Uniprot-TrEMBL) | |
p-Y239,Y240,Y317-SHC1-2 | Protein | P29353-2 (Uniprot-TrEMBL) | |
p-Y91,Y102-TYROBP | Protein | O43914 (Uniprot-TrEMBL) | |
p21 RAS GDP | Complex | REACT_2657 (Reactome) | |
p21 RAS GTP | Complex | REACT_4782 (Reactome) |
Annotated Interactions
View all... |
Source | Target | Type | Database reference | Comment |
---|---|---|---|---|
ADP | Arrow | REACT_147708 (Reactome) | ||
ADP | Arrow | REACT_147713 (Reactome) | ||
ADP | Arrow | REACT_147736 (Reactome) | ||
ADP | Arrow | REACT_147778 (Reactome) | ||
ADP | Arrow | REACT_147796 (Reactome) | ||
ADP | Arrow | REACT_147801 (Reactome) | ||
ADP | Arrow | REACT_147834 (Reactome) | ||
ADP | Arrow | REACT_147856 (Reactome) | ||
ATP | REACT_147708 (Reactome) | |||
ATP | REACT_147713 (Reactome) | |||
ATP | REACT_147736 (Reactome) | |||
ATP | REACT_147778 (Reactome) | |||
ATP | REACT_147796 (Reactome) | |||
ATP | REACT_147801 (Reactome) | |||
ATP | REACT_147834 (Reactome) | |||
ATP | REACT_147856 (Reactome) | |||
BTK | REACT_147785 (Reactome) | |||
CD300E | REACT_147704 (Reactome) | |||
CD300LB | REACT_147706 (Reactome) | |||
CD94
NKG2C HLA-E | REACT_147751 (Reactome) | |||
CLEC5A | REACT_147800 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK PI3K | REACT_147856 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK | Arrow | REACT_147796 (Reactome) | ||
DAP12 Receptors
p-DAP12 p-6Y-SYK | REACT_147708 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK | REACT_147736 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK | REACT_147778 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK | REACT_147834 (Reactome) | |||
DAP12 Receptors
p-DAP12 p-6Y-SYK | REACT_147879 (Reactome) | |||
DAP12 dimer | REACT_147704 (Reactome) | |||
DAP12 dimer | REACT_147706 (Reactome) | |||
DAP12 dimer | REACT_147726 (Reactome) | |||
DAP12 dimer | REACT_147732 (Reactome) | |||
DAP12 dimer | REACT_147742 (Reactome) | |||
DAP12 dimer | REACT_147745 (Reactome) | |||
DAP12 dimer | REACT_147751 (Reactome) | |||
DAP12 dimer | REACT_147773 (Reactome) | |||
DAP12 dimer | REACT_147777 (Reactome) | |||
DAP12 dimer | REACT_147782 (Reactome) | |||
DAP12 dimer | REACT_147800 (Reactome) | |||
DAP12 dimer | REACT_147830 (Reactome) | |||
DAP12 dimer | REACT_147866 (Reactome) | |||
DAP12 dimer | REACT_147897 (Reactome) | |||
DAP12 receptors DAP12 dimer | REACT_147713 (Reactome) | |||
DAP12 receptors
p-DAP12 SYK | REACT_147796 (Reactome) | |||
DAP12 receptors p-Y91,Y102-DAP12 dimer | Arrow | REACT_147713 (Reactome) | ||
DAP12 receptors p-Y91,Y102-DAP12 dimer | REACT_147772 (Reactome) | |||
FYN,LCK | REACT_147713 (Reactome) | |||
GADS SLP76 | REACT_147784 (Reactome) | |||
GDP | Arrow | REACT_147697 (Reactome) | ||
GDP | Arrow | REACT_147838 (Reactome) | ||
GTP | REACT_147697 (Reactome) | |||
GTP | REACT_147838 (Reactome) | |||
KIR2DS1 oligomer HLA-C | REACT_147830 (Reactome) | |||
KIR2DS2 HLA-C1 | REACT_147777 (Reactome) | |||
KIR2DS4 HLA-C Cw4/HLA-C Cw3 | REACT_147866 (Reactome) | |||
KIR2DS5 | REACT_147742 (Reactome) | |||
KIR3DS1 HLA-Bw4 | REACT_147782 (Reactome) | |||
LAT-2 | REACT_147778 (Reactome) | |||
NCR2 | REACT_147726 (Reactome) | |||
NKG2D dimer | REACT_147745 (Reactome) | |||
PI3K | REACT_147879 (Reactome) | |||
PI | Arrow | REACT_147856 (Reactome) | ||
PI | REACT_147785 (Reactome) | |||
PI | REACT_147856 (Reactome) | |||
PLC gamma1/2 | REACT_147817 (Reactome) | |||
RAC1-GDP | REACT_147838 (Reactome) | |||
RAC1-GTP | Arrow | REACT_147838 (Reactome) | ||
REACT_147697 (Reactome) | GRB2-bound SOS promotes the formation of active GTP-bound RAS. This activates the mitogen-activated protein kinase (MAPK) cascade, leading to cell growth and differentiation. | |||
REACT_147702 (Reactome) | Activated PLC-gamma1 disassociates from LAT. Membrane binding is crucial for PLC-gamma 1 activity. The PH-domain of PLC-gamma 1 binds to phosphatidylinositol 3,4,5-trisphosphate [PdtIns(3,4,5)P3], and is targeted to the membrane (Todderud et al. 1990, Wang & Wang. 2003, Kim et al. 2000). Activated PLCG1 then hydrolyses PIP2 to Inositol 1,4,5-triphosphate (IP3) and DAG | |||
REACT_147704 (Reactome) | Immune receptor expressed by myeloid cells 2 (IREM-2), is a member of the Ig-superfamily expressed on myeloid cells. The extracellular region contains a single Ig variable and a positively charged amino acid lysine in its transmembrane region followed by a short cytoplasmic tail. IREM-2 associates with activating adaptor DAP12, through the transmembrane basic amino acid residue. This association induces NFAT transcriptional activity (Aguilar et al. 2004). | |||
REACT_147706 (Reactome) | CLM7/TREM5 is a member of the CMRF-35/immune receptor expressed by myeloid cell (IREM) multigene family of immune receptors expressed on myeloid cells. It has a basic residue in its transmembrane domain and a functional tyrosine-based motif in its short cytoplasmic tail. This structural arrangement confers CLM7 the ability to signal through two independent pathways: one through associating with activating adaptor protein DAP12 and the other through the tyrosine motif in its cytoplasmic tail (Martinez-Barriocanal & Sayos 2006). | |||
REACT_147708 (Reactome) | VAV exists in an auto-inhibitory state, folded in such a way as to inhibit the GEF activity of its DH domain. This folding is mediated through binding of tyrosines in the acidic domain to the DH domain and through binding of the calponin homology (CH) domain to the C1 region. Activation of VAV may involve three events which relieve this auto-inhibition: phosphorylation of tyrosines in the acidic domain causes them to be displaced from the DH domain; binding of a ligand to the CH domain may cause it to release the C1 domain; binding of the PI3K product PIP3 to the PH domain may alter its conformation (Aghazadeh et al. 2000). VAV2/3 are phosphorylated on Y172/Y173 respectively in the acidic domain. This is mediated by SYK and Src-family tyrosine kinases (Deckert et al. 1996, Schuebel et al. 1998). Once activated, VAV2/VAV3 are involved in the activation of RAC1, PAK1, MEK and ERK. | |||
REACT_147713 (Reactome) | Crosslinking of receptors associated with DAP12 leads to phosphorylation of tyrosine residues in their cytoplasmic ITAM by SRC family kinases (Turnbull & Colonna 2007). This initiates downstream signaling. FYN and LCK have both been found physically and functionally associated with receptors using DAP12 signaling and have been demonstrated to be involved in DAP12 phosphorylation (Mason et al. 2006). | |||
REACT_147717 (Reactome) | GRB2 is an adapter protein that contains a central SH2 domain flanked by N- and C-terminal SH3 domains. GRB2 acts downstream of receptor protein-tyrosine kinases and is involved in Ras and MAP kinase pathway activation by associating with the guanine exchange factor (GEF) SOS. GRB2 is constitutively bound to SOS through its SH3 domains, which interact with a proline-rich sequence in the C-terminal part of SOS (Chardin et al. 1993). Following phosphorylation of LAT, the GRB2:SOS complex binds to the phosphorylated tyrosines and is thereby translocated to the inner face of the plasma membrane where inactive RAS:GDP resides. The three distal tyrosines, Y171, Y191 and Y226 of LAT are responsible for GRB2 association (Balagopalan et al. 2010, Zhang et al. 2000). | |||
REACT_147726 (Reactome) | NKp44 is a natural cytotoxicity receptor (NCR) family member selectively expressed by IL-2-activated NK cells. It is a transmembrane receptor involved in recognizing unidentified non-MHC ligands on tumor cells, mediating tumor cell lysis by activated NK cells. NKp44 is coupled to cytoplasmic signal transduction machinery via association with DAP12. Lysine-183 in the transmembrane region of NKp44 may be involved in the association with DAP12. The interaction with DAP12 influences NKp44 surface expression and hence NK cell activation (Campbell et al. 2004, Cantoni et al. 1999, Vitale et al. 1998). | |||
REACT_147732 (Reactome) | SIGLECs are sialic acid-recognizing receptors of the immunoglobulin (Ig) superfamily expressed on immune cells. SEGLEC14 and SEGLEC15 preferentially recognise ligands containing the glycans N-acetylneuraminic acid (Neu5Ac). SEGLEC14, SEGLEC15 and SEGLEC16 are expressed by myeloid cells and associate with the activating adapter protein DAP12 via the arginine residue in their transmembrane domains (Angata et al. 2006, Angata et al. 2007, Cao et al. 2008). | |||
REACT_147736 (Reactome) | SLP-76 lacks intrinsic catalytic activity and acts as a scaffold, recruiting other proteins for correct localization during molecular signal transduction (Bogin et al. 2007). Activation of DAP12-associated receptors leads to tyrosine phosphorylation of SLP-76 (Gross et al. 1999). SLP-76 has three potential tyrosine phosphorylation sites within its amino terminus region: Y113, Y128, and Y145. Phosphorylation may be mediated by SYK, analogous to the role of ZAP-70 in phosphorylating T-cell SLP-76 (Bubeck-Wardenberg et al. 1996). | |||
REACT_147742 (Reactome) | Killer cell immunoglobulin-like two-domain short-tail receptor 5 (KIR2DS5) is an activating KIR receptor expressed on natural killer (NK) cells and subpopulations of T lymphocytes (Nowak et al. 2010). KIR2DS5 has two Ig domains of the D1-D2 type, a short cytoplasmic tail and a positive charged transmembrane (TM) portion. No physiological ligand has yet been identified for KIR2DS5 but it is able to associate with DAP12 and induce both cytotoxicity and cytokine release when KIR2DS5 is cross-linked with monoclonal antibody (Della Chiesa et al. 2008). | |||
REACT_147745 (Reactome) | NKG2D is a member of the NKG2 family of C-type lectin-like surface receptors. It is a homodimeric activating receptor expressed on natural killer (NK) cells, gamma/delta T-cells and CD8+ alpha/beta T-cells. NKG2D can mediate NK activation and cytotoxicity. NKG2D interacts with the stress-induced class I like molecules MICA, MICB and ULBPs expressed on target cells. Interaction of NKG2D and NKG2D ligands leads to NK cell activation (Cosman et al. 2001, Steinle et al. 2001, Long. 2002). In mice there are two alternatively spliced isoforms of NKG2D, designated NKG2D-S and NKG2D-L. DAP12 interacts with NKG2D-S, but not NKG2D-L, whereas the DAP10 adapter associates with both NKG2D-S and NKG2D-L (Gilfillan et al. 2002, Diefenbach et al. 2002). Humans only express an NKG2D-L isoform and exclusively associate with DAP10, and not DAP12 A Structural basis for the association of DAP12 with mouse, but not human, NKG2D (Rosen et al. 2004). | |||
REACT_147748 (Reactome) | DAP12 is expressed as a disulfide-bonded homodimer on NK cells, myeloid cells and a subset of T cells. Cystine-7 in the extracellular domain is involved in the interchain disulphide bond (numbering according to Lanier et al. 1998). | |||
REACT_147751 (Reactome) | NKG2C, a C-type lectin-like surface receptor, is a member of the NKG2 family and forms heterodimers with CD94 that is expressed on NK cells and a subset of T cells. The CD94/NKG2C killer lectin-like receptor (KLR) perform an important role in immunosurveillance by binding to HLA-E complexes that present peptides derived from the signal sequences of other HLA class I molecules (A, B, C, G), thereby monitoring MHC class I expression. It has been proposed that the activating receptor CD94/NKG2C may contribute with other NK stimulatory molecules (like NKp46, NKp44 and NKp30 and NKG2D) to trigger effector functions when the control exerted by inhibitory receptors is overcome (Guma et al. 2005). NKG2C/CD94 associates with the ITAM-containing adapter protein DAP12 and this leads to cell activation and cytotoxic function. The charged residues in the transmembrane domains of DAP12 and NKG2C are necessary for this interaction (Lanier et al. 1998). NK cells expressing the CD94/NKG2C receptor are preferentially expanded during cytomegalovirus infection in humans (Lopez-Verges et al. 2011) | |||
REACT_147772 (Reactome) | Phosphorylated ITAM on DAP12 serves as the docking site for the two SH2 domains of SYK or ZAP70. Binding leads to SYK activation (Lanier et al. 1998, McVicar et al. 1998). | |||
REACT_147773 (Reactome) | TREM2 (triggering receptor expressed on myeloid cells 2 protein) is expressed on the cell membrane of a subset of myeloid cells - namely, immature dendritic cells, osteoclasts, tissue macrophages, and microglia. Like TREM1 the ligand for TREM2 is unknown. TREM2 signals through DAP12, leading to an increase in intracellular calcium and phosphorylation of ERK1/2 (Sharif & Knapp. 2008). It recognises anionic lipopolysacharides in the cell wall of bacteria and triggers the phagocytic uptake of bacteria and the release of reactive oxygen species (Neumann & Daly 2013). TREM2 on immature dendritic cells triggers upregulation of molecules involved in T cell co-stimulation such as CD86, CD40 and MHC class II, as well as up-regulation of the chemokine receptor CCR7 (Bouchon et al. 2001). In macrophages TREM2 is a negative regulator of inflammatory responses (Hamerman et al. 2006, Turnbull et al. 2006). From genome wide association studies, a TREM2 variant (encoding a substitution of arginine by histidine at residue 47 [R47H]) has been reported to be implicated in late-onset Alzheumer's disease (Neumann & Daly 2013). | |||
REACT_147777 (Reactome) | Killer cell immunoglobulin-like two-domain short-tail receptor 2 (KIR2DS2) is an activating KIR receptor invariably expressed on the cell surface of NK cells and subsets of T cells. The ligand specificity of KIR2DS2 is unknown; it does not bind the HLA-Cw3 molecules recognised by the inhibitory receptor KIR2DL2, despite 99% extracellular amino acid identity (Saulquin et al. 2003). In the presence of DAP12, cross-linking of KIR2DS2 with monoclonal antibody leads to phosphorylation of JNK and ERK and activation of both cytotoxicity and IFN-production. | |||
REACT_147778 (Reactome) | LAT is palmitoylated and membrane-associated adaptor protein. It rapidly becomes tyrosine-phosphorylated upon receptor engagement. LAT has nine conserved tyrosine residues of which five have been shown to undergo phosphorylation (Y127, Y132, Y171, Y191 and Y226). Src family kinases, SYK and ZAP-70 efficiently phosphorylate LAT on these tyrosine residues (Jiang & Cheng 2007, Paz et al. 2001). Phosphorylation of LAT creates binding sites for the Src homology 2 (SH2) domain proteins PLC-gamma1, GRB2 and GADS, which indirectly bind SOS, VAV, SLP-76 and ITK (Wange 2000). | |||
REACT_147782 (Reactome) | Killer cell immunoglobulin-like three-domain short-tail receptor 1 (KIR3DS1) is a member of the KIR family expressed on peripheral natural killer (NK) cells and implicated in protection against HIV (Carr et al. 2007, Pascal et al. 2007). The physiological ligand for KIR3DS1 is not clearly determined but it has been suggested to bind HLA-B Bw4-80I on HIV-1-infected target cells (Qi et al. 2006). KIR3DS1 associates with DAP12 and this association enhances its cell surface expression. Crosslinking KIR3DS1 with a monoclonal antibody stimulates NK cell-mediated cytolysis and IFN-gamma production (Carr et al. 2007). | |||
REACT_147784 (Reactome) | Gads/GRAP2 (GRB2-related adapter protein 2) is member of the GRB2 adaptor family with a central SH2 domain and linker region flanked by amino- and carboxy-terminal SH3 domains. SLP-76 associates constitutively via its central 20-amino acid proline-rich domain with the C-terminal SH3 domain of Gads, which recruits it to LAT following receptor stimulation. Upon LAT phosphorylation, Gads:SLP-76 complex principally binds to phosphorylated LAT tyrosine 191, with a reduced amount of binding to phosphorylated tyrosine 171 and no interaction with phosphorylated tyrosines 132 or 226 (Houtman et al. 2004, Zhu et al. 2003). Gads may promote cross-talk between the LAT and SLP-76 signaling complexes, thereby coupling membrane-proximal events to downstream signaling pathways (Liu et al. 1999). The LAT-Gads-SLP-76 complex creates a platform for the recruitment of multiple signaling molecules, including PLCgamma1, GRB2, NCK, Rho GEFs, VAV and the Tec-family kinases ITK and BTK (Liu et al. 1999 & 2001, Asada et al. 1999, Yablonski et al. 2001). | |||
REACT_147785 (Reactome) | VAV2 and VAV3 are expressed in human NK cells and play a central role in NK cell-mediated cytotoxicity. They are required for DAP12-mediated signaling; their loss profoundly impairs DAP12-induced cytotoxicity (Billadeau et al. 2000, Cella et al. 2004). Phosphorylated SLP-76 tyrosines Y113 and Y128 provide binding sites for the SH2 domains of VAV. The binding of VAV to these phosphotyrosine residues may link SLP-76 to the Jun amino-terminal kinase (JNK) pathway and the actin cytoskeleton. Y145 has been implicated in the binding of SLP-76 to the Tec family kinase BTK (Kettner et al. 2003). BTK is required for secretion of pro-inflammatory cytokines, phosphorylation of ERK1/2 and PLCgamma and Ca2+ mobilization (Ormsby et al. 2011). | |||
REACT_147796 (Reactome) | The binding of SYK to DAP12 induces conformational changes that result in SYK activation. Around ten autophosporylated tyrosine residues have been identified in SYK, regulating activity and serving as docking sites for other proteins. Sites include Y131 of interdomain A, Y323, Y348, and Y352 of interdomain B, Y525 and Y526 within the activation loop of the kinase domain and Y630 in the C-terminus (Zhang et al. 2002, Lupher et al. 1998, Furlong et al. 1997). SYK is phosphorylated by Src family kinases and this acts as an initiating trigger by generating a few molecules of activated SYK, which then initiate SYK autophosphorylation (Hillal et al. 1997, Castro et al. 2010) | |||
REACT_147800 (Reactome) | Myeloid DAP12-associating lectin (MDL)-1, also designated CLEC5A, is a type II transmembrane protein belonging to the C-type lectin superfamily and expressed exclusively in monocytes and macrophages. MDL-1 contains a charged residue in the transmembrane region and this enables it to pair with DAP12 dimers. MDL-1's natural mammalian ligand is unknown, but MDL-1 is a receptor for Dengue virus CLEC5A is critical for dengue-virus-induced lethal disease (Chen et al 2008). Engagement with DAP12 has been shown to regulate osteoclastogenesis and myeloid cell-associated inflammatory responses (Bakker et al. 1999, Aoki et al. 2009, Inui et al 2009, Joyce-Shaikh et al. 2010, Cheung et al. 2011). | |||
REACT_147801 (Reactome) | Three tyrosine residues at positions 771, 783 and 1254 in PLCgamma1 have been identified as the sites of receptor tyrosine kinase phosphorylation. Of these Y783 and Y1254 are required for PLC-gamma1 activation. In myeloid cells phosphorylation of the tyrosine residues of PLC-gamma1 is mediated by SYK and BTK kinases (Ormsby et al. 2010, Kim et al. 1994, Law et al. 1996, Watanabe et al. 2001). | |||
REACT_147817 (Reactome) | The phospholipase PLC-gamma is an important mediator of TCR, FCERI and DAP12 signal transduction. PLC-gamma hydrolyzes phosphatidylinositol 4,5-bisphosphate (PIP2) to produce inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG) and in-turn promotes the Ca+2 influx and activation of NFAT. Activation of PLC-gamma1 entails the binding of PLC-gamma1 to both LAT and SLP-76 adapter proteins. The amino-terminal SH2 domain of PLC-gamma1 was shown to preferentially bind phosphorylated LAT Y132 with high affinity and no detectable binding to phosphorylated tyrosines 171, 191, and 226. PLC-gamma1 was also shown to bind the adapter protein SLP-76 indirectly through GADS, which is bound to LAT at Y171 and Y191. SH3 domain of PLC-gamma1 associates with the proline-rich region of SLP-76 (Yablonski et al. 2001). PLC-gamma1 associates with Gads/SLP-76 complex before binding to p-Y132 of LAT (Houtman et al. 2005). PLC-gamma1 association with LAT is stabilized by Gads/SLP-76 bound to LAT (Zhu et al.2003). Association of PLC-gamma to LAT and SLP-76 couples it to the kinases (Syk and Tec family kinase) required for tyrosine phosphorylation and activation of PLC-gamma. Mast cells express both PLC-gamma1 and PLC-gamma2 isoforms, which are phosphorylated by BTK/ITK and/or SYK. FCERI-dependent Ca2+ release requires the recruitment of PLC-gamma by SLP-76 and LAT. In mast cells, increased intracellular calcium triggers rapid release of preformed mediators, through a process of vesicle exocytosis, known as degranulation. Recruitment and activation of phospholipase C gamma (PLC-gamma) is involved in DAP12 signal transduction. Phosphorylation of multiple substrates including PLC-gamma1 has been observed in Ly49D/DAP12 triggered NK cells (McVicar et al. 1998). In myeloid cells, PLC-gamma2 is recruited and then phosphorylated upon activation of TREM2 and DAP12 (Peng et al. 2010). | |||
REACT_147830 (Reactome) | Killer cell immunoglobulin-like two-domain short-tail receptor 1 (KIR2DS1) is one of the activating KIR receptors expressed on the surface of NK cells. It recognizes and binds to ligand HLA-C2:peptide complexes. KIR2DS1 oligomerizes upon interaction with its HLA-Class I ligands. The interaction between the peptide-HLA and KIR2DS1 oligomers leads to activation of the DAP12 signaling cascade. The engagement of KIR2DS1 with HLA-C2 is not sufficient to drive NK cell cytotoxicity or IFN-gamma production (Stewart et al. 2005). Recognition of HLA-C2 by KIR2DS1 is involved in the anti-leukemic activity of alloreactive NK cells and associated with protection against Hodgkin's lymphoma (Cognet et al. 2010). The presence of the HLA-C2 allele HLA-Cw6 in combination with KIR2DS1 is a major risk factor for psoriasis (Ploski et al. 2006). | |||
REACT_147834 (Reactome) | In myeloid cells BTK is phosphorylated on Y551 upon DAP12 activation in a SYK kinase-dependent manner. Y551 is located in the activation loop of BTK, known to be required for activation and kinase activity. Y223 in the SH3 domain of BTK is autophosphorylated, which may also be involved in BTK activation (Ormsby et al. 2010, Rawlings et al. 1996). | |||
REACT_147838 (Reactome) | Activated VAV2/3 act as guanine nucleotide exchange factors (GEFs) for RAC-1, catalysing the exchange of bound GDP for GTP. | |||
REACT_147856 (Reactome) | Activated PI3K phosphorylates phosphatidylinositol (PI) 4-phosphate and PI 4,5-bisphosphate (PIP2) to generate PI 3,4-bisphosphate and PI 3,4,5-triphosphate (PIP3) and these second messengers recruit other signaling proteins containing plecstrin homology (PH) domain. Products of PI3K are involved in the regulation of PLC-gamma 1 and VAV activation. The PH domain of PLC-gamma 1 binds to PIP3 and is targeted to the membrane. PIP3 binds to the PH domain of VAV2/VAV3 and increases it activity and PI3K may also strongly stimulate VAV activity by converting an inhibitory regulator VAV to an activator (Toker & Cantley 1997, Fischer et al. 1998, Falasca et al. 1998). | |||
REACT_147866 (Reactome) | Killer cell immunoglobulin-like two-domain short-tail receptor 4 (KIR2DS4) is the most prevalent lineage III-activating KIR receptor. It interacts weakly but specifically with HLA-Cw3 and HLA-Cw4 and may also bind to an uncharacterised non-MHC molecule. It can associate with DAP12, activating NK cells. | |||
REACT_147879 (Reactome) | Phosphoinositide 3-kinases (PI3Ks) are one of the downstream effectors of activated SYK. The p85 alpha regulatory subunit of PI3K has been shown to interact with SYK phospho-tyrosine Y323. In DAP12 signaling SYK acts via the PI3K-dependent pathway to control NK cell-mediated cytotoxicity. SYK-coupled PI3K is rapidly activated and triggers a sequential activation of VAV2/VA3, RAC1, PAK1, MEK and ERK to mediate NK cell-mediated lysis (Jiang et al. 2002, Moon et al. 2005). | |||
REACT_147897 (Reactome) | TREM proteins (triggering receptors expressed on myeloid cells) are a family of cell surface receptors involved in innate immune responses. They are expressed in myeloid cells and have both positive and negative functions in regulating myeloid cell activation and differentiation. Humans have two members, TREM1 and TREM2. TREM1 is considered an amplifier of the immune response, while TREM2 is believed to be a negative regulator of inflammatory responses (Sharif & Knaap 2008). TREM proteins consist of a single extracellular V-type Ig-like domain, a transmembrane region and a short cytoplasmic tail lacking any signalling motifs (Kelker et al. 2004). Both receptors associate with DAP12 for signalling. The ligand for TREM1 is unknown. TREM1 associates with DAP12 dimer. This interaction is mediated by aspartic acid and adjacent threonine residues in the DAP12 dimer that interface with lysine residues in the TREM1 transmembrane region. TREM1 engagement triggers the production of inflammatory chemokines and cytokines such as IL-8 and myeloperoxidase (MPO) in neutrophils and IL-8, MCP-1, and TNF in monocytes (Tessarz & Cerwenka 2008, Bouchon et al. 2000). | |||
REACT_23798 (Reactome) | SIRP beta , also named CD172b, is expressed mainly on myeloid cells and has a very short cytoplasmic region of only six amino acids, lacking the signaling motifs for association with phosphatases that are found in the highly related SIRP alpha receptor. Instead, SIRP associates with a dimeric protein DAP12 to transmit activating signals via an ITAM in the cytoplasmic domain of DAP12. A positively charged amino acid in the transmembrane domain of DAP12 associate with a basic amino acid in SIRP beta's transmembrane region. | |||
SIGLEC14/15/16 | REACT_147732 (Reactome) | |||
SIRPB1 | REACT_23798 (Reactome) | |||
SYK | REACT_147772 (Reactome) | |||
TREM1 | REACT_147897 (Reactome) | |||
TREM2 | REACT_147773 (Reactome) | |||
TYROBP | REACT_23798 (Reactome) | |||
VAV2/VAV3 | REACT_147785 (Reactome) | |||
p-5Y-LAT
GRB2 SOS GADS p-3Y-SLP-76 p-2Y-BTK VAV p-PLCG | Arrow | REACT_147801 (Reactome) | ||
p-5Y-LAT
GRB2 SOS GADS p-3Y-SLP-76 p-2Y-BTK VAV | Arrow | REACT_147702 (Reactome) | ||
p-5Y-LAT
GRB2 SOS1 GADS p-3Y-SLP-76 PLCG VAV p-Y223,Y551-BTK | Arrow | REACT_147834 (Reactome) | ||
p-5Y-LAT
GRB2 SOS1 GADS p-3Y-SLP-76 PLCG VAV p-Y223,Y551-BTK | REACT_147801 (Reactome) | |||
p-5Y-LAT
GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG VAV BTK PIP3 | REACT_147708 (Reactome) | |||
p-5Y-LAT
GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG VAV BTK PIP3 | REACT_147834 (Reactome) | |||
p-5Y-LAT
PLCG1 GADS p-3Y-SLP-76 BTK p-VAV | Arrow | REACT_147708 (Reactome) | ||
p-5Y-LAT
PLCG1 GADS p-3Y-SLP-76 BTK p-VAV | REACT_147838 (Reactome) | |||
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS SLP76 PLCG | REACT_147736 (Reactome) | |||
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS SLP76 | REACT_147817 (Reactome) | |||
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG | Arrow | REACT_147736 (Reactome) | ||
p-5Y-LAT
p-SHC1 GRB2 SOS1 GADS p-Y113,Y128,Y145-SLP-76 PLCG | REACT_147785 (Reactome) | |||
p-5Y-LAT
p-SHC1 GRB2 SOS1 | REACT_147697 (Reactome) | |||
p-5Y-LAT
p-SHC1 GRB2 SOS1 | REACT_147784 (Reactome) | |||
p-5Y-LAT-2 | Arrow | REACT_147778 (Reactome) | ||
p-5Y-LAT-2 | REACT_147717 (Reactome) | |||
p-PLCG | Arrow | REACT_147702 (Reactome) | ||
p-SHC1
GRB2 SOS | REACT_147717 (Reactome) | |||
p-SYK/p-BTK | REACT_147801 (Reactome) | |||
p21 RAS GDP | REACT_147697 (Reactome) | |||
p21 RAS GTP | Arrow | REACT_147697 (Reactome) |