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Subunit: Interacts with the PH domain of APS. Interacts (via SH2 domains) with the phosphorylated form of EPHA2. Interacts with ROS1; constitutive interaction that mediates VAV3 phosphorylation Sequence caution: Sequence=AAD03799.1; Type=Erroneous initiation; Note=Translation N-terminally shortened; 1 PDB 3D structure from [IMAGE] and Proteopedia [IMAGE] for VAV3: 2D86 (3D) [IMAGE]
Tissue specificity: Isoform 1 and isoform 3 are widely expressed; both are expressed at very low levels in skeletal muscle. In keratinocytes, isoform 1 is less abundant than isoform 3. Isoform 3 is detected at very low levels, if any, in adrenal gland, bone marrow, spleen, f
Function: UniProtKB/Swiss-Prot Summary: VAV3_HUMAN, Q9UKW4 Function: Exchange factor for GTP-binding proteins RhoA, RhoG and, to a lesser extent, Rac1. Binds physically to the nucleotide-free states of those GTPases. Plays an important role in angiogenesis. Its recruitment by phosphorylated EPHA2 is critical for EFNA1-induced RAC1 GTPase activation and vascular endothelial cell migration and assembly (By similarity). May be important for integrin-mediated signaling, at least in some cell types. In osteoclasts, along with SYK tyrosine kinase, required for signaling through integrin alpha-v/beta-1 (ITAGV-ITGB1), a crucial event for osteoclast proper cytoskeleton organization and function. This signaling pathway involves RAC1, but not RHO, activation. Necessary for proper wound healing. In the course of wound healing, required for the phagocytotic cup formation preceding macrophage phagocytosis of apoptotic neutrophils. Responsible for integrin beta-2 (ITGB2)-mediated macrophage adhesion and, to a lesser extent, contributes to beta-3 (ITGB3)-mediated adhesion. Does not affect integrin beta-1 (ITGB1)-mediated adhesion (By similarity)
Similarity: Contains 1 CH (calponin-homology) domain Contains 1 DH (DBL-homology) domain Contains 1 PH domain Contains 1 phorbol-ester/DAG-type zinc finger Contains 1 SH2 domain Contains 2 SH3 domains [IMAGE]
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