Dedicator of cytokinesis3 (DOCK3), also named as MOCA and PBP, is a ~180 kDa protein involved in signaling transduction. It is a potential guanine nucleotide exchange factor (GEF) which activate some small GTPases by exchanging bound GDP for free GTP. DOCK3 is associated in Alzheimer disease tangles and regulates the accumulation of amyloid precursor protein and beta-amyloid. Overexpression of Dock3 in neural cells promotes axonal outgrowth downstream of brain-derived neurotrophic factor (BDNF) signaling. DOCK3 binds to and inactivates glycogen synthase kinase-3beta (GSK-3beta) at the plasma membrane, thereby promoting axon branching and microtubule assembly. By stimulating actin polymerization and microtubule assembly, DOCK3 plays important roles downstream of BDNF signaling in the CNS.
Dedicator of cytokinesis protein 3; dok-3; Modifier of cell adhesion; PBP; Presenilin-binding protein
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