RP2 (gene)

Protein XRP2 is a protein that in humans is encoded by the RP2 gene.

RP2
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2BX6, 3BH6, 3BH7
Identifiers
Aliases	RP2, DELXp11.3, NM23-H10, NME10, TBCCD2, Xretinitis pigmentosa 2 (X-linked recessive), ARL3 GTPase activating protein, RP2 activator of ARL3 GTPase
External IDs	OMIM: 300757; MGI: 1277953; HomoloGene: 5042; GeneCards: RP2; OMA:RP2 - orthologs
Gene location (Human) Chr. X chromosome (human) Band Xp11.3 Start 46,837,043 bp End 46,882,358 bp
Gene location (Mouse) Chr. X chromosome (mouse) Band X|X A1.3 Start 20,230,720 bp End 20,271,892 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in monocyte jejunal mucosa bone marrow blood mucosa of sigmoid colon ventricular zone bone marrow cells lower lobe of lung appendix gallbladder Top expressed in olfactory epithelium Epithelium of choroid plexus granulocyte spermatid blood seminal vesicula mesenteric lymph nodes spleen medial ganglionic eminence left colon More reference expression data BioGPS More reference expression data
Gene ontology Molecular function nucleotide binding unfolded protein binding GTP binding protein binding GTPase activator activity magnesium ion binding Cellular component cytoplasm ciliary basal body Golgi apparatus cell projection membrane plasma membrane periciliary membrane compartment centriole extracellular exosome cytoplasmic vesicle nucleoplasm cilium nuclear body Biological process post-chaperonin tubulin folding pathway post-Golgi vesicle-mediated transport protein folding protein transport visual perception positive regulation of GTPase activity transport cell morphogenesis Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 6102 19889 Ensembl ENSG00000102218 ENSMUSG00000060090 UniProt O75695 Q9EPK2 RefSeq (mRNA) NM_006915 NM_001290643 NM_001290644 NM_133669 RefSeq (protein) NP_008846 NP_001277572 NP_001277573 NP_598430 Location (UCSC) Chr X: 46.84 – 46.88 Mb Chr X: 20.23 – 20.27 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Function

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. The RP2 protein is also involved in regulating the function and extension of the outer segment of cone photoreceptors in mice.

Further reading

• Clayton JF, Wright AF, Jay M, McKeown CM, Dempster M, Jay BS, Bird AC, Bhattacharya SS (1986). "Genetic linkage between X-linked retinitis pigmentosa and DNA probe DXS7 (L1.28): further linkage data, heterogeneity testing, and risk estimation". Hum. Genet. 74 (2): 168–71. doi:10.1007/BF00282083. PMID 2876947. S2CID 29305725.
• Thiselton DL, Hampson RM, Nayudu M, Van Maldergem L, Wolf ML, Saha BK, Bhattacharya SS, Hardcastle AJ (1997). "Mapping the RP2 locus for X-linked retinitis pigmentosa on proximal Xp: a genetically defined 5-cM critical region and exclusion of candidate genes by physical mapping". Genome Res. 6 (11): 1093–102. doi:10.1101/gr.6.11.1093. PMID 8938433.
• Mears AJ, Gieser L, Yan D, Chen C, Fahrner S, Hiriyanna S, Fujita R, Jacobson SG, Sieving PA, Swaroop A (1999). "Protein-truncation mutations in the RP2 gene in a North American cohort of families with X-linked retinitis pigmentosa". Am. J. Hum. Genet. 64 (3): 897–900. doi:10.1086/302298. PMC 1377809. PMID 10053026.
• Hardcastle AJ, Thiselton DL, Van Maldergem L, Saha BK, Jay M, Plant C, Taylor R, Bird AC, Bhattacharya S (2000). "Mutations in the RP2 gene cause disease in 10% of families with familial X-linked retinitis pigmentosa assessed in this study". Am. J. Hum. Genet. 64 (4): 1210–5. doi:10.1086/302325. PMC 1377846. PMID 10090907.
• Rosenberg T, Schwahn U, Feil S, Berger W (1999). "Genotype-phenotype correlation in X-linked retinitis pigmentosa 2 (RP2)". Ophthalmic Genet. 20 (3): 161–172. doi:10.1076/opge.20.3.161.2278. PMID 10520237.
• Wada Y, Nakazawa M, Abe T, Tamai M (2000). "A new Leu253Arg mutation in the RP2 gene in a Japanese family with X-linked retinitis pigmentosa". Invest. Ophthalmol. Vis. Sci. 41 (1): 290–3. PMID 10634633.
• Thiselton DL, Zito I, Plant C, Jay M, Hodgson SV, Bird AC, Bhattacharya SS, Hardcastle AJ (2000). "Novel frameshift mutations in the RP2 gene and polymorphic variants". Hum. Mutat. 15 (6): 580. doi:10.1002/1098-1004(200006)15:6<580::AID-HUMU15>3.0.CO;2-3. PMID 10862093.
• Sharon D, Bruns GA, McGee TL, Sandberg MA, Berson EL, Dryja TP (2000). "X-linked retinitis pigmentosa: mutation spectrum of the RPGR and RP2 genes and correlation with visual function". Invest. Ophthalmol. Vis. Sci. 41 (9): 2712–21. PMID 10937588.
• Chapple JP, Hardcastle AJ, Grayson C, Spackman LA, Willison KR, Cheetham ME (2000). "Mutations in the N-terminus of the X-linked retinitis pigmentosa protein RP2 interfere with the normal targeting of the protein to the plasma membrane". Hum. Mol. Genet. 9 (13): 1919–26. doi:10.1093/hmg/9.13.1919. PMID 10942419.
• Miano MG, Testa F, Filippini F, Trujillo M, Conte I, Lanzara C, Millán JM, De Bernardo C, Grammatico B, Mangino M, Torrente I, Carrozzo R, Simonelli F, Rinaldi E, Ventruto V, D'Urso M, Ayuso C, Ciccodicola A (2001). "Identification of novel RP2 mutations in a subset of X-linked retinitis pigmentosa families and prediction of new domains". Hum. Mutat. 18 (2): 109–19. doi:10.1002/humu.1160. PMID 11462235. S2CID 46654846.
• Liu L, Wei Y, Chen H (2002). "[Identification of a nonsense mutation causing X-linked RP2 in two Chinese families]". Zhonghua Yi Xue Za Zhi. 81 (2): 71–2. PMID 11798852.
• Bartolini F, Bhamidipati A, Thomas S, Schwahn U, Lewis SA, Cowan NJ (2002). "Functional overlap between retinitis pigmentosa 2 protein and the tubulin-specific chaperone cofactor C". J. Biol. Chem. 277 (17): 14629–34. doi:10.1074/jbc.M200128200. PMID 11847227.
• Breuer DK, Yashar BM, Filippova E, Hiriyanna S, Lyons RH, Mears AJ, Asaye B, Acar C, Vervoort R, Wright AF, Musarella MA, Wheeler P, MacDonald I, Iannaccone A, Birch D, Hoffman DR, Fishman GA, Heckenlively JR, Jacobson SG, Sieving PA, Swaroop A (2002). "A comprehensive mutation analysis of RP2 and RPGR in a North American cohort of families with X-linked retinitis pigmentosa". Am. J. Hum. Genet. 70 (6): 1545–54. doi:10.1086/340848. PMC 379141. PMID 11992260.
• Bader I, Brandau O, Achatz H, Apfelstedt-Sylla E, Hergersberg M, Lorenz B, Wissinger B, Wittwer B, Rudolph G, Meindl A, Meitinger T (2003). "X-linked retinitis pigmentosa: RPGR mutations in most families with definite X linkage and clustering of mutations in a short sequence stretch of exon ORF15". Invest. Ophthalmol. Vis. Sci. 44 (4): 1458–63. doi:10.1167/iovs.02-0605. PMID 12657579.
• Sharon D, Sandberg MA, Rabe VW, Stillberger M, Dryja TP, Berson EL (2004). "RP2 and RPGR mutations and clinical correlations in patients with X-linked retinitis pigmentosa". Am. J. Hum. Genet. 73 (5): 1131–46. doi:10.1086/379379. PMC 1180492. PMID 14564670.
• Andréasson S, Breuer DK, Eksandh L, Ponjavic V, Frennesson C, Hiriyanna S, Filippova E, Yashar BM, Swaroop A (2004). "Clinical studies of X-linked retinitis pigmentosa in three Swedish families with newly identified mutations in the RP2 and RPGR-ORF15 genes". Ophthalmic Genet. 24 (4): 215–23. doi:10.1076/opge.24.4.215.17228. PMID 14566651. S2CID 9032014.