RP2 Antibody – Mouse Monoclonal

The RP2 locus has been implicated as one cause of X-linked retinitis pigmentosa. The predicted gene product shows homology with human cofactor C, a protein involved in the ultimate step of beta-tubulin folding. Progressive retinal degeneration may therefore be due to the accumulation of incorrectly-folded photoreceptor or neuron-specific tubulin isoforms followed by progressive cell death [provided by RefSeq, Jul 2008]

RP2: Acts as a GTPase-activating protein (GAP) involved in trafficking between the Golgi and the ciliary membrane. Involved in localization of proteins, such as NPHP3, to the cilium membrane by inducing hydrolysis of GTP ARL3, leading to the release of UNC119 (or UNC119B). Acts as a GTPase-activating protein (GAP) for tubulin in concert with tubulin-specific chaperone C, but does not enhance tubulin heterodimerization. Acts as guanine nucleotide dissociation inhibitor towards ADP-ribosylation factor-like proteins. Defects in RP2 are the cause of retinitis pigmentosa type 2 (RP2); also known as X-linked retinitis pigmentosa 2 (XLRP-2). RP leads to degeneration of retinal photoreceptor cells. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. Belongs to the TBCC family.

Protein type: Chaperone

Chromosomal Location of Human Ortholog: Xp11.3

Cellular Component: centriole; Golgi apparatus; cytoplasm; plasma membrane; cytoplasmic vesicle

Molecular Function: protein binding; GTP binding; unfolded protein binding; nucleoside diphosphate kinase activity; actin binding; GTPase activator activity; ATP binding

Biological Process: GTP biosynthetic process; CTP biosynthetic process; protein transport; protein folding; visual perception; organelle organization and biogenesis; UTP biosynthetic process; cell morphogenesis; nucleoside diphosphate phosphorylation; cytoskeleton organization and biogenesis; post-Golgi vesicle-mediated transport; post-chaperonin tubulin folding pathway; positive regulation of GTPase activity

Disease: Retinitis Pigmentosa 2