Reactome: A Curated Pathway Database
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Phosphorylation of ITAM motifs in CD3 complexes

Stable Identifier
R-HSA-202165
Type
Reaction
Species
Homo sapiens
Compartment
Locations in the PathwayBrowser
Summation

The autophosphorylated, active Lck is now proximally positioned to phosphorylate specific tyrosine residues within ITAMs (immunoreceptor tyrosine-based activation motifs) located within the CD3 and the TCR zeta signaling chains of the TCR. ITAMs consist of evolutionarily conserved amino-acid sequence motifs of D/ExYxxLx(6-8)YxxL. Both the tyrosine residues in the motif are phosphorylated by Lck and the TCR complex include 10 ITAMs with one ITAM in each of the CD3 chains including the three tandem ITAMs in each zeta chains.

Literature References
PubMed ID Title Journal Year
Participants
Participant Of
This entity is regulated by:
Title Physical Entity Activity
protein tyrosine kinase activity of Antigen-bearing MHC Class II :TCR complex:CD4: Lck phosphorylated at Tyr394 [plasma membrane] Antigen-bearing MHC Class II :TCR complex:CD4: Lck phosphorylated at Tyr394 [plasma membrane] protein tyrosine kinase activity (0004713)
Orthologous Events