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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q16518: Variant p.Ala132Thr

Retinoid isomerohydrolase
Gene: RPE65
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Variant information Variant position: help 132 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help US 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 Alanine (A) to Threonine (T) at position 132 (A132T, p.Ala132Thr). 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 small size and hydrophobic (A) to medium size and polar (T) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 RP20; uncertain significance. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 132 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 533 The length of the canonical sequence.
Location on the sequence: help CKNIFSRFFSYFRGVEVTDN A LVNVYPVGEDYYACTETNFI 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                         CKNIFSRFFSYFRGVEVTDNALVNVYPVGEDYYACTETNFI

                              CKNIFSRFFSYFRGVEVTDNALVNVYPVGEDYYACTETNFI

Mouse                         CKNIFSRFFSYFKGVEVTDNALVNIYPVGEDYYACTETNFI

Rat                           CKNIFSRFFSYFRGVEITDNALVNIYPVGEDYYACTETNFI

Bovine                        CKNIFSRFFSYFRGVEVTDNALVNIYPVGEDYYACTETNFI

Chicken                       CKNIFSRFFSYFKGVEVTDNALVNVYPVGEDYYACTETNFI

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 2 – 533 Retinoid isomerohydrolase
Modified residue 113 – 113 N6-acetyllysine
Modified residue 117 – 117 Phosphoserine
Lipidation 112 – 112 S-palmitoyl cysteine; in membrane form
Mutagenesis 112 – 112 C -> A. Loss of enzymatic activity. No palmitoylation. Loss of membrane association.



Literature citations
Mutations in the RPE65 gene in patients with autosomal recessive retinitis pigmentosa or Leber congenital amaurosis.
Morimura H.; Fishman G.A.; Grover S.A.; Fulton A.B.; Berson E.L.; Dryja T.P.;
Proc. Natl. Acad. Sci. U.S.A. 95:3088-3093(1998)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS RP20 TRP-91; LYS-102; THR-132; SER-341; GLY-452 AND ASP-473; Genetics and phenotypes of RPE65 mutations in inherited retinal degeneration.
Thompson D.A.; Gyuerues P.; Fleischer L.L.; Bingham E.L.; McHenry C.L.; Apfelstedt-Sylla E.; Zrenner E.; Lorenz B.; Richards J.E.; Jacobson S.G.; Sieving P.A.; Gal A.;
Invest. Ophthalmol. Vis. Sci. 41:4293-4299(2000)
Cited for: VARIANTS RP20 HIS-79; HIS-85; TRP-91; GLN-95; THR-132; TYR-167; THR-294; VAL-436 AND VAL-528;
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.