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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P25445: Variant p.Thr28Ala

Tumor necrosis factor receptor superfamily member 6
Gene: FAS
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Variant information Variant position: help 28 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 Threonine (T) to Alanine (A) at position 28 (T28A, p.Thr28Ala). 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 (T) to small size and hydrophobic (A) 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 ALPS1A; associated with autoimmune hepatitis type 2. Any additional useful information about the variant.


Sequence information Variant position: help 28 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 335 The length of the canonical sequence.
Location on the sequence: help LPLVLTSVARLSSKSVNAQV T DINSKGLELRKTVTTVETQN 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                         LPLVLTSVARLSSKSVNAQVTDINSKGLELRKTVTTVETQN

Rhesus macaque                LPLVLTSVVRLLSKCVNAQVTDISSKGFELRKIVTTIETQN

Mouse                         LPLVL---AGSQLR-VHTQGTNSISESLKLRRRVRETDKNC

Rat                           LPLVL---AGPELN-VRMQGTDSIFEGLELKRSVRETDNNC

Pig                           LSLVFTCIAGPLSKGDDAQVTDPDSEMVKLN--ITKRESEC

Bovine                        LSLIFISVSGPLSKGENAHMAGINSEGLKLN--ITEANS-C
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 – 335 Tumor necrosis factor receptor superfamily member 6
Topological domain 26 – 173 Extracellular
Glycosylation 28 – 28 O-linked (GalNAc...) threonine



Literature citations
Fas/Apo1 mutations and autoimmune lymphoproliferative syndrome in a patient with type 2 autoimmune hepatitis.
Pensati L.; Costanzo A.; Ianni A.; Accapezzato D.; Iorio R.; Natoli G.; Nisini R.; Almerighi C.; Balsano C.; Vajro P.; Vegnente A.; Levrero M.;
Gastroenterology 113:1384-1389(1997)
Cited for: VARIANT ALPS1A ALA-28;
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.