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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P82279: Variant p.Arg764Cys

Protein crumbs homolog 1
Gene: CRB1
Variant information Variant position: help 764 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change: help From Arginine (R) to Cysteine (C) at position 764 (R764C, p.Arg764Cys). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Change from large size and basic (R) to medium size and polar (C) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description: help In RP12 and LCA8. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.

Sequence information Variant position: help 764 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1406 The length of the canonical sequence.
Location on the sequence: help RTLQPSGLLLALENSTYQYI R VWLERGRLAMLTPNSPKLVV The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation: help The multiple alignment of the region surrounding the variant against various orthologous sequences.


Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
Chain 26 – 1406 Protein crumbs homolog 1
Topological domain 26 – 1347 Extracellular
Domain 714 – 885 Laminin G-like 2
Glycosylation 757 – 757 N-linked (GlcNAc...) asparagine
Alternative sequence 710 – 1245 Missing. In isoform 5.

Literature citations
Mutations in a human homologue of Drosophila crumbs cause retinitis pigmentosa (RP12).
den Hollander A.I.; ten Brink J.B.; de Kok Y.J.M.; van Soest S.; van den Born L.I.; van Driel M.A.; van de Pol D.J.R.; Payne A.M.; Bhattacharya S.S.; Kellner U.; Hoyng C.B.; Westerveld A.; Brunner H.G.; Bleeker-Wagemakers E.M.; Deutman A.F.; Heckenlively J.R.; Cremers F.P.M.; Bergen A.A.B.;
Nat. Genet. 23:217-221(1999)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2); VARIANTS RP12 VAL-161; TRP-250; MET-745; CYS-764; TYR-948; THR-1041 AND PRO-1071; Leber congenital amaurosis and retinitis pigmentosa with Coats-like exudative vasculopathy are associated with mutations in the crumbs homologue 1 (CRB1) gene.
den Hollander A.I.; Heckenlively J.R.; van den Born L.I.; de Kok Y.J.M.; van der Velde-Visser S.D.; Kellner U.; Jurklies B.; van Schooneveld M.J.; Blankenagel A.; Rohrschneider K.; Wissinger B.; Cruysberg J.R.M.; Deutman A.F.; Brunner H.G.; Apfelstedt-Sylla E.; Hoyng C.B.; Cremers F.P.M.;
Am. J. Hum. Genet. 69:198-203(2001)
Cited for: VARIANTS LCA8 TYR-948 AND ARG-1100; VARIANTS RP12 CYS-433; CYS-764; HIS-837; TYR-948; ARG-1181 AND THR-1354; VARIANTS MET-289; MET-821; SER-894 AND HIS-1331; Mutations in the CRB1 gene cause Leber congenital amaurosis.
Lotery A.J.; Jacobson S.G.; Fishman G.A.; Weleber R.G.; Fulton A.B.; Namperumalsamy P.; Heon E.; Levin A.V.; Grover S.; Rosenow J.R.; Kopp K.K.; Sheffield V.C.; Stone E.M.;
Arch. Ophthalmol. 119:415-420(2001)
Cited for: VARIANTS LCA8 VAL-144; TYR-383; GLY-480; ARG-480; TYR-681; CYS-764; TYR-948; ARG-1205 AND HIS-1317; VARIANTS MET-289; GLN-769 AND HIS-1331; Crumbs homolog 1 (CRB1) mutations result in a thick human retina with abnormal lamination.
Jacobson S.G.; Cideciyan A.V.; Aleman T.S.; Pianta M.J.; Sumaroka A.; Schwartz S.B.; Smilko E.E.; Milam A.H.; Sheffield V.C.; Stone E.M.;
Hum. Mol. Genet. 12:1073-1078(2003)
Cited for: VARIANTS LCA8 SER-749 DEL; CYS-764; TYR-948 AND PHE-1218; Leber congenital amaurosis: comprehensive survey of the genetic heterogeneity, refinement of the clinical definition, and genotype-phenotype correlations as a strategy for molecular diagnosis.
Hanein S.; Perrault I.; Gerber S.; Tanguy G.; Barbet F.; Ducroq D.; Calvas P.; Dollfus H.; Hamel C.; Lopponen T.; Munier F.; Santos L.; Shalev S.; Zafeiriou D.; Dufier J.-L.; Munnich A.; Rozet J.-M.; Kaplan J.;
Hum. Mutat. 23:306-317(2004)
Cited for: VARIANTS LCA8 TYR-584; GLN-710; THR-741; MET-745; CYS-764; THR-852; TYR-948; ILE-1025; ARG-1103; ARG-1107; PRO-1107 AND SER-1321; CRB1 mutation spectrum in inherited retinal dystrophies.
den Hollander A.I.; Davis J.; van der Velde-Visser S.D.; Zonneveld M.N.; Pierrottet C.O.; Koenekoop R.K.; Kellner U.; van den Born L.I.; Heckenlively J.R.; Hoyng C.B.; Handford P.A.; Roepman R.; Cremers F.P.M.;
Hum. Mutat. 24:355-369(2004)
Cited for: VARIANTS RP12 PHE-195; GLU-578; TYR-587; MET-745; CYS-764; THR-836; SER-850; TYR-948; SER-959; ILE-986; THR-1100 AND HIS-1383; VARIANT LCA8 THR-205; VARIANT GLN-905; Clinical phenotypes in carriers of Leber congenital amaurosis mutations.
Galvin J.A.; Fishman G.A.; Stone E.M.; Koenekoop R.K.;
Ophthalmology 112:349-356(2005)
Cited for: VARIANTS LCA8 PRO-753; CYS-764 AND TYR-948; Evaluation of genotype-phenotype associations in Leber congenital amaurosis.
Galvin J.A.; Fishman G.A.; Stone E.M.; Koenekoop R.K.;
Retina 25:919-929(2005)
Cited for: VARIANTS LCA8 ARG-480; TYR-681; PRO-753; CYS-764 AND TYR-948; VARIANT SER-488; Genetic screening of LCA in Belgium: predominance of CEP290 and identification of potential modifier alleles in AHI1 of CEP290-related phenotypes.
Coppieters F.; Casteels I.; Meire F.; De Jaegere S.; Hooghe S.; van Regemorter N.; Van Esch H.; Matuleviciene A.; Nunes L.; Meersschaut V.; Walraedt S.; Standaert L.; Coucke P.; Hoeben H.; Kroes H.Y.; Vande Walle J.; de Ravel T.; Leroy B.P.; De Baere E.;
Hum. Mutat. 31:E1709-E1766(2010)
Cited for: INVOLVEMENT IN RETINAL DYSTROPHIES; VARIANTS EARLY-ONSET RETINAL DYSTROPHY TYR-310; CYS-764 AND TYR-948; VARIANT VAL-491; Phenotypic variability in patients with retinal dystrophies due to mutations in CRB1.
Henderson R.H.; Mackay D.S.; Li Z.; Moradi P.; Sergouniotis P.; Russell-Eggitt I.; Thompson D.A.; Robson A.G.; Holder G.E.; Webster A.R.; Moore A.T.;
Br. J. Ophthalmol. 95:811-817(2011)
Cited for: VARIANTS RP12 SER-157; TRP-250; LYS-312; CYS-675; VAL-710; MET-745; CYS-764; THR-836; ARG-846; TYR-948; SER-1012; ASN-1025 AND GLY-1174; VARIANTS LCA8 THR-205; SER-850; THR-1003; ARG-1103; PRO-1107; GLY-1174 AND LEU-1381; VARIANTS EARLY-ONSET RETINAL DYSTROPHY THR-741 AND ASP-1365;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.