UniProtKB/SwissProt variant VAR

Variant information

Variant position:

368

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

Type of variant:

Disease [Disclaimer]

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 Phenylalanine (F) to Isoleucine (I) at position 368 (F368I, p.Phe368Ile).

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 large size and aromatic (F) to medium size and hydrophobic (I)

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

Involvement in disease:

Mitochondrial complex III deficiency, nuclear 1 (MC3DN1) [MIM:124000]: A disorder of the mitochondrial respiratory chain resulting in a highly variable phenotype depending on which tissues are affected. Clinical features include mitochondrial encephalopathy, psychomotor retardation, ataxia, severe failure to thrive, liver dysfunction, renal tubulopathy, muscle weakness and exercise intolerance. {ECO:0000269|PubMed:11528392, ECO:0000269|PubMed:12910490, ECO:0000269|PubMed:17314340, ECO:0000269|PubMed:17403714, ECO:0000269|PubMed:18628306, ECO:0000269|PubMed:19162478, ECO:0000269|PubMed:22991165}. Note=The disease is caused by mutations affecting the gene represented in this entry.

The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:

In MC3DN1.

Any additional useful information about the variant.

Sequence information

Variant position:

368

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

Protein sequence length:

419

The length of the canonical sequence.

Location on the sequence:

DLKEYVGYCSHWQLTQMFQR F YPGQAPSLAENFAEHVLRAT

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                         DLKEYVGYCSHWQLTQMFQRFYPGQAPSLAENFAEHVLRAT

Mouse                         DLKEYVGYCSHWQLTQMFQRFYPGQAPSLAENFAEHVLKAT

Bovine                        DMKEYVGHCSRWQLTQMFQRFYPGQATSLAENFADRVLQAT

Xenopus laevis                DVKQYVGHCTNWQLSQMFLRFYPDQTAGQSEAFASAALSSS

Zebrafish                     DLKQYVGHCSHWQLTQMFRRFYPQESAAEADHFSEQALAAH

Baker's yeast                 DYKVFVGNATPYQVEKMFMKFYPGET-DICKKFVNSVKELD

Fission yeast                 DVKAYLGNATPEQVREMFTRFY-GHSPEMADDLSDIVCPKN

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	2 – 419	Mitochondrial chaperone BCS1
Topological domain	33 – 419	Mitochondrial matrix

Literature citations

Impaired complex III assembly associated with BCS1L gene mutations in isolated mitochondrial encephalopathy.
Fernandez-Vizarra E.; Bugiani M.; Goffrini P.; Carrara F.; Farina L.; Procopio E.; Donati A.; Uziel G.; Ferrero I.; Zeviani M.;
Hum. Mol. Genet. 16:1241-1252(2007)
Cited for: VARIANTS MC3DN1 CYS-73; CYS-183; CYS-184 AND ILE-368;

UniProtKB/Swiss-Prot Q9Y276: Variant p.Phe368Ile