Summary

Name ITGA4
Full Name Integrin alpha-4
Synonyms CD49 antigen-like family member D, Integrin alpha-IV, VLA-4 subunit alpha | CD49D
Primary ID P13612
Links - -
Type protein
Relations 3
Function Integrins alpha-4/beta-1 (VLA-4) and alpha-4/beta-7 are receptors for fibronectin. They recognize one or more domains within the alternatively spliced CS-1 and CS-5 regions of fibronectin. They are also receptors for VCAM1. Integrin alpha-4/beta-1 recognizes the sequence Q-I-D-S in VCAM1. Integrin alpha-4/beta-7 is also a receptor for MADCAM1. It recognizes the sequence L-D-T in MADCAM1. On activated endothelial cells integrin VLA-4 triggers homotypic aggregation for most VLA-4-positive leukocyte cell lines. It may also participate in cytolytic T-cell interactions with target cells. ITGA4:ITGB1 binds to fractalkine (CX3CL1) and may act as its coreceptor in CX3CR1-dependent fractalkine signaling (PubMed:23125415). ITGA4:ITGB1 binds to PLA2G2A via a site (site 2) which is distinct from the classical ligand-binding site (site 1) and this induces integrin conformational changes and enhanced ligand binding to site 1 (PubMed:18635536, PubMed:25398877).

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Modifications Tables

Relations

Regulator Mechanism target score
+ up-regulates activity img/direct-activation.png phosphorylation ITGA4 0.47
Publications: 1 Organism: Homo Sapiens
+ form complex img/form-complex.png binding A4/b7 integrin 0.852
Publications: 1
+ form complex img/form-complex.png binding A4/b1 integrin 0.803
Publications: 1