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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q14028: Variant p.Gly993Val

Cyclic nucleotide-gated cation channel beta-1
Gene: CNGB1
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Variant information Variant position: help 993 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 Glycine (G) to Valine (V) at position 993 (G993V, p.Gly993Val). 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 glycine (G) to medium size and hydrophobic (V) 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 RP45. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 993 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1251 The length of the canonical sequence.
Location on the sequence: help DMLKRLRSVVYLPNDYVCKK G EIGREMYIIQAGQVQVLGGP 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                         DMLKRLRSVVYLPNDYVCKKGEIGREMYIIQAGQVQVLGGP

Bovine                        DMLKRLRSVVYLPNDYVCKKGEIGREMYIIQAGQVQVLGGP
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 1 – 1251 Cyclic nucleotide-gated cation channel beta-1
Topological domain 983 – 1251 Cytoplasmic
Binding site 970 – 1109
Alternative sequence 300 – 1251 Missing. In isoform GARP2.
Beta strand 992 – 995



Literature citations
Segregation of a mutation in CNGB1 encoding the beta-subunit of the rod cGMP-gated channel in a family with autosomal recessive retinitis pigmentosa.
Bareil C.; Hamel C.P.; Delague V.; Arnaud B.; Demaille J.; Claustres M.;
Hum. Genet. 108:328-334(2001)
Cited for: VARIANT RP45 VAL-993;
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.