UniProtKB/SwissProt variant VAR

Variant information

Variant position:

546

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 Threonine (T) to Methionine (M) at position 546 (T546M, p.Thr546Met).

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 polar (T) to medium size and hydrophobic (M)

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

BLOSUM score:

-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

Polymorphism:

Polymorphism in ABCC11 is associated with variation in apocrine gland secretion [MIM:117800]. This determines different ear wax phenotypes, presence or absence of axillary odor, and variation in colostrum secretion. Characteristic of earwax and strength of axillary odor are most likely interconnected. Human earwax is a Mendelian trait consisting of wet and dry types. The wet earwax is brownish and sticky, whereas the dry type lacks cerumen. The wet cerumen phenotype is completely dominant. The dry type is seen frequently (80-95%) among East Asians, but uncommon (0-3%) in populations of European and African origins. Intermediate frequencies (30-50%) of the dry type are seen in populations of Southern Asia, the Pacific Islands, Central Asia and Asia Minor, as well as among the Native North American and Inuit of Asian ancestry. The allele with Arg-180 is responsible for the dry earwax phenotype and lack of axillary odor.

Additional information on the polymorphism described.

Variant description:

Reduced transport activity; no effect on glycosylation; no effect on plasma membrane localization.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs17822471 [ dbSNP | Ensembl ]

Sequence information

Variant position:

546

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

Protein sequence length:

1382

The length of the canonical sequence.

Location on the sequence:

ELHKINLVVSKGMMLGVCGN T GSGKSSLLSAILEEMHLLEG

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.

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 – 1382	ATP-binding cassette sub-family C member 11
Topological domain	439 – 806	Cytoplasmic
Domain	508 – 732	ABC transporter 1
Nucleotide binding	544 – 551	ATP 1

Literature citations

Earwax, osmidrosis, and breast cancer: why does one SNP (538G>A) in the human ABC transporter ABCC11 gene determine earwax type?
Toyoda Y.; Sakurai A.; Mitani Y.; Nakashima M.; Yoshiura K.; Nakagawa H.; Sakai Y.; Ota I.; Lezhava A.; Hayashizaki Y.; Niikawa N.; Ishikawa T.;
FASEB J. 23:2001-2013(2009)
Cited for: VARIANT ARG-180; CHARACTERIZATION OF VARIANTS HIS-19; ARG-180; GLU-317; MET-546; TRP-630; ILE-648; ILE-687; ARG-735; VAL-970 AND ARG-1344; FUNCTION; SUBCELLULAR LOCATION; TISSUE SPECIFICITY; GLYCOSYLATION AT ASN-838 AND ASN-844; POLYMORPHISM; MUTAGENESIS OF GLY-180; ASN-838 AND ASN-844;

Functional characterization of common protein variants in the efflux transporter ABCC11 and identification of T546M as functionally damaging variant.
Arlanov R.; Lang T.; Jedlitschky G.; Schaeffeler E.; Ishikawa T.; Schwab M.; Nies A.T.;
Pharmacogenomics J. 16:193-201(2016)
Cited for: CHARACTERIZATION OF VARIANTS HIS-19; ARG-180; GLU-317; MET-546; ILE-648 AND ARG-1344; FUNCTION; SUBCELLULAR LOCATION;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q96J66: Variant p.Thr546Met