UniProtKB/SwissProt variant VAR

Variant information

Variant position:

326

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 Isoleucine (I) at position 326 (V326I, p.Val326Ile).

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:

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:

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

Polymorphism:

Polymorphism at position 11 acts synergistically with different mutations in AGXT producing specific enzymic phenotypes in HP1 patients. The combined presence of Leu-11 and Met-340 polymorphisms defines the minor AGXT allele, whereas their absence defines the major allele. The minor allele has frequencies of 20% in normal European and North American populations, and 50% in HP1 patients.

Additional information on the polymorphism described.

Other resources:

Links to websites of interest for the variant.

Variant rs115057148 [ dbSNP | Ensembl ]

Sequence information

Variant position:

326

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

Protein sequence length:

392

The length of the canonical sequence.

Location on the sequence:

GLQLFVKDPALRLPTVTTVA V PAGYDWRDIVSYVIDHFDIE

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                         GLQLFVKDPAL--------RLPTVTTVAVPAGYDWRDIVSYVIDHFDIE

Mouse                         GLKFFVKDPEI--------RLPTITTVTVPAGYNWRDIVSY

Rat                           GLKFFVKDPEI--------RLPTITTVTVPAGYNWRDIVSY

Rabbit                        GLQLFVKDPAL--------RLPTVTTVIVPASYRWRDIVSY

Cat                           GLQLFVKDPAL--------RLPTVTTVAVPAGYDWRDIVNY

Slime mold                    GLKPFV--PQLNEAPEKGGRLFSLTTVNIPDGVDGKMVMKY

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 – 392	Serine--pyruvate aminotransferase
Modified residue	312 – 312	N6-acetyllysine

Literature citations

The AGT gene in Africa: a distinctive minor allele haplotype, a polymorphism (V326I), and a novel PH1 mutation (A112D) in Black Africans.
Coulter-Mackie M.B.; Tung A.; Henderson H.E.; Toone J.R.; Applegarth D.A.;
Mol. Genet. Metab. 78:44-50(2003)
Cited for: VARIANT HP1 ASP-112; VARIANT ILE-326;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P21549: Variant p.Val326Ile