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UniProtKB/Swiss-Prot O95342: Variant p.Asp676Tyr

Bile salt export pump
Gene: ABCB11
Chromosomal location: 2q24
Variant information

Variant position:  676
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Unclassified
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Aspartate (D) to Tyrosine (Y) at position 676 (D676Y, p.Asp676Tyr).
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:  Change from medium size and acidic (D) to large size and aromatic (Y)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In fluvastatin-induced cholestasis; does not affect transport capacity for taurocholate.
Any additional useful information about the variant.



Sequence information

Variant position:  676
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1321
The length of the canonical sequence.

Location on the sequence:   LQSQGNQALNEEDIKDATED  D MLARTFSRGSYQDSLRASIR
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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         LQSQGNQALNEEDI--KDATEDDMLARTFSRGSYQDSLRASIR

Mouse                         LQSQEDNTHKETGIKGKDTTEGDTPERTFSRGSYQDSLRAS

Rat                           LQSQGDNAHKETSIMGKDATEGGTLERTFSRGSYRDSLRAS

Rabbit                        LQSQRNQGDQEENE--KDATEDDIPEKTFSRGNYQDSLRAS

Sequence annotation in neighborhood:  
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 – 1321 Bile salt export pump
Topological domain 375 – 755 Cytoplasmic
Modified residue 690 – 690 Phosphoserine


Literature citations

Mutations and polymorphisms in the bile salt export pump and the multidrug resistance protein 3 associated with drug-induced liver injury.
Lang C.; Meier Y.; Stieger B.; Beuers U.; Lang T.; Kerb R.; Kullak-Ublick G.A.; Meier P.J.; Pauli-Magnus C.;
Pharmacogenet. Genomics 17:47-60(2007)
Cited for: VARIANTS ALA-284; ALA-444; TYR-676; VAL-677; HIS-698 AND ARG-855; BIOPHYSICOCHEMICAL PROPERTIES; CHARACTERIZATION OF VARIANTS ALA-444; TYR-676; VAL-677 AND ARG-855;

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.