UniProtKB/SwissProt variant VAR

Variant information

Variant position:

143

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

Type of variant:

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:

From Glutamate (E) to Lysine (K) at position 143 (E143K, p.Glu143Lys).

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 (E) to large size and basic (K)

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

Variant description:

In HYCHL; severe decrease of activity in the presence of physiological NaCl concentrations; mutant enzyme is highly inhibited by acetazolamide and shows higher sensitivity to inhibition by anions compared to wild-type; the mutation affects the chloride-mediated negative feedback regulation of the enzyme leading to excessive chloride secretion in sweat; no effect on localization to cell membrane.

Any additional useful information about the variant.

Other resources:

Links to websites of interest for the variant.

Variant rs267606694 [ dbSNP | Ensembl ]

Sequence information

Variant position:

143

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

Protein sequence length:

354

The length of the canonical sequence.

Location on the sequence:

GNPNDPHGSEHTVSGQHFAA E LHIVHYNSDLYPDASTASNK

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                         GNPNDPHGSEHTVSGQHFAAELHIVHYNSDLYPDASTASNK

Mouse                         GNRNDPHGSEHTVSGKHFAAELHIVHYNSDLYPDFSTASDK

Rabbit                        GNRNDPYGSEHTVGGKQFAAELHIVHYNSDSYPDISTASNK

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	25 – 354	Carbonic anhydrase 12
Topological domain	25 – 301	Extracellular
Domain	30 – 289	Alpha-carbonic anhydrase
Metal binding	145 – 145	Zinc; catalytic
Glycosylation	162 – 162	N-linked (GlcNAc...) asparagine
Disulfide bond	50 – 230
Beta strand	141 – 150

Literature citations

Loss of carbonic anhydrase XII function in individuals with elevated sweat chloride concentration and pulmonary airway disease.
Lee M.; Vecchio-Pagan B.; Sharma N.; Waheed A.; Li X.; Raraigh K.S.; Robbins S.; Han S.T.; Franca A.L.; Pellicore M.J.; Evans T.A.; Arcara K.M.; Nguyen H.; Luan S.; Belchis D.; Hertecant J.; Zabner J.; Sly W.S.; Cutting G.R.;
Hum. Mol. Genet. 25:1923-1933(2016)
Cited for: FUNCTION; CATALYTIC ACTIVITY; TISSUE SPECIFICITY; SUBCELLULAR LOCATION; VARIANT HYCHL GLN-121; CHARACTERIZATION OF VARIANTS HYCHL GLN-121 AND LYS-143;

Hyperchlorhidrosis caused by homozygous mutation in CA12, encoding carbonic anhydrase XII.
Feldshtein M.; Elkrinawi S.; Yerushalmi B.; Marcus B.; Vullo D.; Romi H.; Ofir R.; Landau D.; Sivan S.; Supuran C.T.; Birk O.S.;
Am. J. Hum. Genet. 87:713-720(2010)
Cited for: VARIANT HYCHL LYS-143; INVOLVEMENT IN HYCHL; BIOPHYSICOCHEMICAL PROPERTIES;

Autosomal recessive hyponatremia due to isolated salt wasting in sweat associated with a mutation in the active site of carbonic cnhydrase 12.
Muhammad E.; Leventhal N.; Parvari G.; Hanukoglu A.; Hanukoglu I.; Chalifa-Caspi V.; Feinstein Y.; Weinbrand J.; Jacoby H.; Manor E.; Nagar T.; Beck J.C.; Sheffield V.C.; Hershkovitz E.; Parvari R.;
Hum. Genet. 129:397-405(2011)
Cited for: VARIANT HYCHL LYS-143;

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O43570: Variant p.Glu143Lys