RAP1A

Function

Counteracts the mitogenic function of Ras, at least partly because it can interact with Ras GAPs and RAF in a competitive manner. Together with ITGB1BP1, regulates KRIT1 localization to microtubules and membranes (PubMed:17916086). Plays a role in nerve growth factor (NGF)-induced neurite outgrowth. Plays a role in the regulation of embryonic blood vessel formation. Involved in the establishment of basal endothelial barrier function. Facilitates the progressive accumulation of CDH1 at mature desmosome junctions via cAMP-dependent signaling and its interaction with PKP3 (PubMed:25208567). May be involved in the regulation of the vascular endothelial growth factor receptor KDR expression at endothelial cell-cell junctions.

Sequence Similarities

Belongs to the small GTPase superfamily. Ras family.

Cellular localization

• Cell membrane
• Lipid-anchor
• Cytoplasm
• Cytoplasm
• Perinuclear region
• Cell junction
• Early endosome
• Recruited from early endosome to late endosome compartment after nerve growth factor (NGF) stimulation. Localized with RAPGEF2 at cell-cell junctions (By similarity). Colocalized with RAPGEF2 in the perinuclear region.

Alternative names

KREV1, RAP1A, Ras-related protein Rap-1A, C21KG, G-22K, GTP-binding protein smg p21A, Ras-related protein Krev-1

Database links

swissprot:P62834 omim:179530 omim:179520 swissprot:P61224 omim:RAP1B entrezGene:5908 entrezGene:5906