UniProtKB/SwissProt variant VAR

Variant information

Variant position:

284

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

Type of variant:

Polymorphism

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 Valine (V) to Alanine (A) at position 284 (V284A, p.Val284Ala).

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 hydrophobic (V) to small size and hydrophobic (A)

The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:

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

Other resources:

Links to websites of interest for the variant.

Variant rs200739891 [ dbSNP | Ensembl ]

Sequence information

Variant position:

284

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:

SKFTDYELKAYAKAGVVADE V ISSMRTVAAFGGEKREVERY

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                         SKFTDYELKAYAKAGVVADEVISSMRTVAAFGGEKREVERY

Mouse                         AKFTELELKAYAKAGSIADEVLSSIRTVAAFGGENKEVERY

Rat                           AKFTELELKAYAKAGSIADEVLSSIRTVAAFGGENKEVERY

Rabbit                        SKFTDYELKAYAKAGSVADEVISSMRTVAAFGGEKKEVERY

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.

Type	Positions	Description
Chain	1 – 1321	Bile salt export pump
Topological domain	262 – 319	Cytoplasmic
Domain	62 – 385	ABC transmembrane type-1 1

Literature citations

Genetic variability, haplotype structures, and ethnic diversity of hepatic transporters MDR3 (ABCB4) and bile salt export pump (ABCB11).
Lang T.; Haberl M.; Jung D.; Drescher A.; Schlagenhaufer R.; Keil A.; Mornhinweg E.; Stieger B.; Kullak-Ublick G.A.; Kerb R.;
Drug Metab. Dispos. 34:1582-1599(2006)
Cited for: VARIANTS VAL-206; ALA-284; LYS-299; ALA-444; GLY-616; ALA-619; VAL-677; HIS-698; VAL-865 AND GLN-958;

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;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O95342: Variant p.Val284Ala