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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P82279: Variant p.Cys1321Ser

Protein crumbs homolog 1
Gene: CRB1
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Variant information Variant position: help 1321 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 Cysteine (C) to Serine (S) at position 1321 (C1321S, p.Cys1321Ser). 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 medium size and polar (C) to small size and polar (S) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -1 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 LCA8; also early onset RP without preservation of the paraarteriolar retinal pigment epithelium. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 1321 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 CASDPCVNGGLCQDLLNKFQ C LCDVAFAGERCEVDLADDLI 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. 
Human                         CASDPCVNGGLCQDLLNKFQCLCDVAFAGERCEVDLADDLI

Mouse                         CASDPCINGGLCRDLVNRFLCICDVAFAGERCELDLADDRL
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.
TypePositionsDescription
Chain 26 – 1406 Protein crumbs homolog 1
Topological domain 26 – 1347 Extracellular
Domain 1297 – 1333 EGF-like 19; calcium-binding
Disulfide bond 1306 – 1321
Alternative sequence 1294 – 1406 Missing. In isoform 4.



Literature citations
CRB1 mutations may result in retinitis pigmentosa without para-arteriolar RPE preservation.
Lotery A.J.; Malik A.; Shami S.A.; Sindhi M.; Chohan B.; Maqbool C.; Moore P.A.; Denton M.J.; Stone E.M.;
Ophthalmic Genet. 22:163-169(2001)
Cited for: VARIANT RP12 SER-1321; 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;
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.