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Acts as guanine nucleotide exchange factor (GEF) for RHOA, RAC1 and CDC42 GTPases. Regulates cell migration and adhesion assembly and disassembly through a RAC1, PI3K, RHOA and AKT1-dependent mechanism. Increases both RAC1 and CDC42 activity, but decreases the amount of active RHOA. Required for MMP9 up-regulation via the JNK signaling pathway in colorectal tumor cells. Involved in tumor angiogenesis and may play a role in intestinal adenoma formation and tumor progression.
Gene References into Functions
Phosphorylation of S106 modulates Asef2 guanine nucleotide exchange factor activity and Asef2-mediated cell migration and adhesion turnover. PMID: 24874604
A new role for Rac activation, promoted by Asef2, in modulating actomyosin contractility. PMID: 24144700
Asef2 activates Rac1 to modulate adhesion and actin dynamics and thereby regulate cell migration. PMID: 19934221
These results suggest that similar to Asef, Asef2 plays an important role in cell migration, and that Asef2 activated by truncated mutant APC is required for aberrant migration of colorectal tumor cells. PMID: 17599059
Asef2, Neurabin2 and APC cooperatively regulate actin cytoskeletal organization and are required for HGF-induced cell migration. PMID: 19151759
Observational study of gene-disease association. (HuGE Navigator) PMID: 19910543
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Subcellular Location
Cytoplasm. Cell projection, filopodium. Cell projection, lamellipodium. Cell projection, ruffle membrane. Note=Accumulates in the lamellipodium and ruffle membrane in response to hepatocyte growth factor (HGF) treatment.
Tissue Specificity
Expressed at high levels in the placenta, spleen and kidney, at moderate levels in lung, small intestine, liver, brain and heart, and at low levels in skeletal muscle. Expression is aberrantly enhanced in most colorectal tumors.