Oxygen-regulated protein 1 also known as retinitis pigmentosa 1 protein (RP1) is a protein that in humans is encoded by the RP1gene.[5][6]
Function
This gene encodes a member of the doublecortin family. The protein encoded by this gene contains two doublecortin domains that bind to microtubules and regulate microtubule polymerization. The encoded protein is a protein associated with the photoreceptor cell microtubules in the retina and is necessary for the correct stacking of outer segment disc. This protein and another retinal-specific protein, RP1L1, play essential and synergistic roles in affecting photosensitivity and outer segment morphogenesis of rod photoreceptor cells.[6]
History
Initially named "ORP1" for its response to in vivoretinal oxygen levels (designated ORP1 for 'oxygen-regulated protein-1'), this gene was subsequently linked to autosomal dominant retinitis pigmentosa and was renamed RP1 for 'retinitis pigmentosa 1'.
Clinical significance
Mutations in this gene cause autosomal dominant or autosomal recessive retinitis pigmentosa.[7][8][9][10][11] Transcript variants produced by alternative promoters and alternative splicing have been discovered that overlap with the current reference sequence and have multiple exons upstream and downstream of the current reference sequence. However, as of 2010, it is currently impossible to determine the biological effectiveness and full-length nature of certain variants.[6]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Blanton SH, Heckenlively JR, Cottingham AW, Friedman J, Sadler LA, Wagner M, et al. (Mar 1992). "Linkage mapping of autosomal dominant retinitis pigmentosa (RP1) to the pericentric region of human chromosome 8". Genomics. 11 (4): 857–69. doi:10.1016/0888-7543(91)90008-3. PMID1783394.
^Daiger SP, Sullivan LS, Bowne SJ, Kennan A, Humphries P, Birch DG, et al. (2003). "Identification of the RP1 and RP10 (IMPDH1) Genes Causing Autosomal Dominant RP". Retinal Degenerations. Advances in Experimental Medicine and Biology. Vol. 533. pp. 1–11. doi:10.1007/978-1-4615-0067-4_1. ISBN978-1-4613-4909-9. PMC2583078. PMID15180241.
^Daiger SP, Shankar SP, Schindler AB, Sullivan LS, Bowne SJ, King TM, et al. (2006). "Genetic factors modifying clinical expression of autosomal dominant RP". Retinal Degenerative Diseases. Advances in Experimental Medicine and Biology. Vol. 572. pp. 3–8. doi:10.1007/0-387-32442-9_1. ISBN978-0-387-28464-4. PMC2581449. PMID17249547.
^Wang DY, Chan WM, Tam PO, Baum L, Lam DS, Chong KK, et al. (January 2005). "Gene mutations in retinitis pigmentosa and their clinical implications". Clinica Chimica Acta; International Journal of Clinical Chemistry. 351 (1–2): 5–16. doi:10.1016/j.cccn.2004.08.004. PMID15563868.
Pierce EA, Quinn T, Meehan T, McGee TL, Berson EL, Dryja TP (1999). "Mutations in a gene encoding a new oxygen-regulated photoreceptor protein cause dominant retinitis pigmentosa". Nat. Genet. 22 (3): 248–54. doi:10.1038/10305. PMID10391211. S2CID26312606.
Fujita Y, Ezura Y, Emi M, Ono S, Takada D, Takahashi K, et al. (2004). "Hypertriglyceridemia associated with amino acid variation Asn985Tyr of the RP1 gene". J. Hum. Genet. 48 (6): 305–8. doi:10.1007/s10038-003-0029-z. PMID12764676. S2CID25963579.
Schwartz SB, Aleman TS, Cideciyan AV, Swaroop A, Jacobson SG, Stone EM (2003). "De novo mutation in the RP1 gene (Arg677ter) associated with retinitis pigmentosa". Invest. Ophthalmol. Vis. Sci. 44 (8): 3593–7. doi:10.1167/iovs.03-0155. PMID12882812.
Kawamura M, Wada Y, Noda Y, Itabashi T, Ogawa SI, Sato H, et al. (2004). "Novel 2336-2337delCT mutation in RP1 gene in a Japanese family with autosomal dominant retinitis pigmentosa". Am. J. Ophthalmol. 137 (6): 1137–9. doi:10.1016/j.ajo.2003.12.037. PMID15183808.
Roberts L, Bartmann L, Ramesar R, Greenberg J (2006). "Novel variants in the hotspot region of RP1 in South African patients with retinitis pigmentosa". Mol. Vis. 12: 177–83. PMID16568030.