NCAM signaling for neurite out-growth (Homo sapiens)
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Description
The neural cell adhesion molecule, NCAM, is a member of the immunoglobulin (Ig) superfamily and is involved in a variety of cellular processes of importance for the formation and maintenance of the nervous system. The role of NCAM in neural differentiation and synaptic plasticity is presumed to depend on the modulation of intracellular signal transduction cascades. NCAM based signaling complexes can initiate downstream intracellular signals by at least two mechanisms: (1) activation of FGFR and (2) formation of intracellular signaling complexes by direct interaction with cytoplasmic interaction partners such as Fyn and FAK. Tyrosine kinases Fyn and FAK interact with NCAM and undergo phosphorylation and this transiently activates the MAPK, ERK 1 and 2, cAMP response element binding protein (CREB) and transcription factors ELK and NFkB. CREB activates transcription of genes which are important for axonal growth, survival, and synaptic plasticity in neurons.
NCAM1 mediated intracellular signal transduction is represented in the figure below. The Ig domains in NCAM1 are represented in orange ovals and Fn domains in green squares. The tyrosine residues susceptible to phosphorylation are represented in red circles and their positions are numbered. Phosphorylation is represented by red arrows and dephosphorylation by yellow. Ig, Immunoglobulin domain; Fn, Fibronectin domain; Fyn, Proto-oncogene tyrosine-protein kinase Fyn; FAK, focal adhesion kinase; RPTPalpha, Receptor-type tyrosine-protein phosphatase; Grb2, Growth factor receptor-bound protein 2; SOS, Son of sevenless homolog; Raf, RAF proto-oncogene serine/threonine-protein kinase; MEK, MAPK and ERK kinase; ERK, Extracellular signal-regulated kinase; MSK1, Mitogen and stress activated protein kinase 1; CREB, Cyclic AMP-responsive element-binding protein; CRE, cAMP response elements.
NCAM1 mediated intracellular signal transduction is represented in the figure below. The Ig domains in NCAM1 are represented in orange ovals and Fn domains in green squares. The tyrosine residues susceptible to phosphorylation are represented in red circles and their positions are numbered. Phosphorylation is represented by red arrows and dephosphorylation by yellow. Ig, Immunoglobulin domain; Fn, Fibronectin domain; Fyn, Proto-oncogene tyrosine-protein kinase Fyn; FAK, focal adhesion kinase; RPTPalpha, Receptor-type tyrosine-protein phosphatase; Grb2, Growth factor receptor-bound protein 2; SOS, Son of sevenless homolog; Raf, RAF proto-oncogene serine/threonine-protein kinase; MEK, MAPK and ERK kinase; ERK, Extracellular signal-regulated kinase; MSK1, Mitogen and stress activated protein kinase 1; CREB, Cyclic AMP-responsive element-binding protein; CRE, cAMP response elements.
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Bibliography
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History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
ADP | Metabolite | 16761 (ChEBI) | |
ATP | Metabolite | 15422 (ChEBI) | |
Agrin | Protein | O00468 (UniProt) | |
Axonin-1 | Protein | Q02246 (UniProt) | |
CREB | Protein | P16220 (UniProt) | |
Collagens | Complex | REACT_18161 (Reactome) | |
FADK1 | Protein | Q05397 (UniProt) | |
FGFR1c homodimer | Complex | REACT_9800 (Reactome) | |
FYN | Protein | P06241 (UniProt) | |
Fyn:NCAM1:RPTP-
alpha | Complex | REACT_18571 (Reactome) | |
GDNF family ligands
(GFLs) | Protein | REACT_20000 (Reactome) | |
GDP | Metabolite | 17552 (ChEBI) | |
GFRalpha | Protein | REACT_19467 (Reactome) | |
GRB2 | Protein | P62993-1 (UniProt) | |
GTP | Metabolite | 15996 (ChEBI) | |
Glycosylated NCAM1 | Protein | P13591 (UniProt) | |
Grb2:Sos:pFAK
bound to NCAM1: pFyn | Complex | REACT_18839 (Reactome) | |
Grb2:pFAK bound to
NCAM1:pFyn | Complex | REACT_18783 (Reactome) | |
MAP kinase
cascade | Pathway | REACT_634 (Reactome) | 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. |
MSK1 | Protein | O75582 (UniProt) | |
Major prion protein | Protein | P04156 (UniProt) | |
Multiple
phosphorylated FAK bound to NCAM:pFyn | Complex | REACT_18768 (Reactome) | |
NCAM-1:ATP | Complex | REACT_18582 (Reactome) | |
NCAM-1:Agrin | Complex | REACT_19071 (Reactome) | |
NCAM-1:Collagen
complex | Complex | REACT_18833 (Reactome) | |
NCAM-1:Major prion
protein | Complex | REACT_18842 (Reactome) | |
NCAM-1:Neurocan | Complex | REACT_18891 (Reactome) | |
NCAM1 | Protein | P13591 (UniProt) | |
NCAM1 cis-
homodimer | Complex | REACT_19070 (Reactome) | |
NCAM1 complexed
with Fyn | Complex | REACT_18556 (Reactome) | |
NCAM1 complexed
with pFyn-Y420 | Complex | REACT_18470 (Reactome) | |
NCAM1-Contactin-2 | Complex | REACT_19032 (Reactome) | |
NCAM1:FGFR-1 | Complex | REACT_18900 (Reactome) | |
NCAM1:GFRalpha-1 | Complex | REACT_18445 (Reactome) | |
NCAM1:GFRalpha-1:
GDNF | Complex | REACT_18598 (Reactome) | |
NCAM1:NCAM1
trans-homotetramer | Complex | REACT_18931 (Reactome) | |
NCAM1:T- and L-
type VDCC | Complex | REACT_21777 (Reactome) | |
Neurocan | Protein | O14594 (UniProt) | |
Orthophosphate | Metabolite | 18367 (ChEBI) | |
Phospho-ERK dimer | Unknown | REACT_12827 (Reactome) | |
Phospho-MSK1 | Protein | O75582 (UniProt) | |
Polysialic acid | Unknown | REACT_18892 (Reactome) | |
Polysialylated NCAM | Complex | REACT_18914 (Reactome) | |
RAF activation | Pathway | REACT_2077 (Reactome) | Phosphorylated RAF is activated by Ras binding and stabilised in its active form by transient disassociation and reassociation of 14-3-3, as well as further phosphorylation. |
Receptor-type
tyrosine-protein phosphatase alpha | Protein | P18433 (UniProt) | |
SRC | Protein | P12931-1 (UniProt) | |
Son of sevenless
protein homolog 1 | Protein | Q07889 (UniProt) | |
Spectrin heterodimer | Complex | REACT_19000 (Reactome) | Spectrin is a protein found at the intracellular surface of the plasma membrane in many cell types. In association with other proteins particularly protein 4.1 and ankyrin it forms hexagonal or pentagonal structures that act as a plasma membrane scaffold for other membrane structures and as an attachment point for cytoskeletal proteins such as actin. The erythrocyte forms of spectrin are the best studied (and not exclusievely expressed in erthrocytes). |
T- and L-type VDCC | Protein | REACT_21538 (Reactome) | |
alpha 2-8
polysialyltransferases | Unknown | REACT_18945 (Reactome) | |
p21 RAS:GDP | Complex | REACT_2657 (Reactome) | |
p21 RAS:GTP | Complex | REACT_4782 (Reactome) | |
pFAK (391) bound to
NCAM1:pFyn | Complex | REACT_18498 (Reactome) | |
pFyn-Y531 | Protein | P06241 (UniProt) | |
phospho-CREB | Protein | P16220 (UniProt) |
Annotated Interactions
No annotated interactions