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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O42043: Variant p.Cys97Tyr

Endogenous retrovirus group K member 18 Env polyprotein
Gene: ERVK-18
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Variant information Variant position: help 97 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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 Tyrosine (Y) at position 97 (C97Y, p.Cys97Tyr). 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 large size and aromatic (Y) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -2 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

Polymorphism: help This envelope gene is polymorphic with at least three different alleles (called HERV-K18.1, HERV-K18.2 and HERV-K18.3). A polymorphism introducing a premature stop codon in position 154 is present in allele HERV-K18.1 resulting in a truncated SU protein. The sequence shown is that of HERV-K18.2.Some positive evidence of genetic association found between allele HERV-K18.3 and type 1 diabetes. - Additional information on the polymorphism described.
Variant description: help In allele HERV-K18.1 and allele HERV-K18.3. Any additional useful information about the variant.


Sequence information Variant position: help 97 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 560 The length of the canonical sequence.
Location on the sequence: help PNSRFTYHMVSGMSLRPRVN C LQDFSYQRSLKFRPKGKTCP 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.
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 – 560 Endogenous retrovirus group K member 18 Env polyprotein
Chain 1 – 354 Surface protein



Literature citations
No reference for the current variant in UniProtKB/Swiss-Prot.
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.