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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q15020: Variant p.Val591Met

Squamous cell carcinoma antigen recognized by T-cells 3
Gene: SART3
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Variant information Variant position: help 591 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 Valine (V) to Methionine (M) at position 591 (V591M, p.Val591Met). 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 Similar physico-chemical property. Both residues are medium size and hydrophobic. 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 Found in a patient with disseminated superficial actinic porokeratosis; 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 591 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 963 The length of the canonical sequence.
Location on the sequence: help TRLARVNEQRMKAAEKEAAL V QQEEEKAEQRKRARAEKKAL 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                         TRLA-RVNEQRMKAAEKEAALVQQEEEKAEQRKRARAEKKAL

Mouse                         TRLA-RVNEQRMKAAEKEAALVQQEEEKAEQRKKVRAEKKA

Zebrafish                     TKLN-RVCEQRARVAEKEALHARQEEEKAEQRRKVKADKKA

Caenorhabditis elegans        SQVAHRAIRPQKKVSEKPAPAPKSKQDHIQKRT--------

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 – 963 Squamous cell carcinoma antigen recognized by T-cells 3
Region 537 – 953 Necessary and sufficient for U6 snRNA binding
Region 590 – 694 Disordered
Coiled coil 559 – 619
Compositional bias 590 – 605 Basic and acidic residues
Alternative sequence 130 – 963 Missing. In isoform 3.
Alternative sequence 365 – 963 Missing. In isoform 2.
Helix 559 – 603



Literature citations
A mutation in SART3 gene in a Chinese pedigree with disseminated superficial actinic porokeratosis.
Zhang Z.H.; Niu Z.M.; Yuan W.T.; Zhao J.J.; Jiang F.X.; Zhang J.; Chai B.; Cui F.; Chen W.; Lian C.H.; Xiang L.H.; Xu S.J.; Liu W.D.; Zheng Z.Z.; Huang W.;
Br. J. Dermatol. 152:658-663(2005)
Cited for: VARIANT MET-591;
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.