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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P00156: Variant p.Thr368Ile

Cytochrome b
Gene: MT-CYB
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Variant information Variant position: help 368 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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: help From Threonine (T) to Isoleucine (I) at position 368 (T368I, p.Thr368Ile). 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: help Change from medium size and polar (T) to medium size and hydrophobic (I) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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

Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 368 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 380 The length of the canonical sequence.
Location on the sequence: help TIIGQVASVLYFTTILILMP T ISLIENKMLKWA 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         TIIGQVASVLYFTTILILMPTISLIENKMLKWA--------

Gorilla                       ITIGQVASVLYFTTILFLMPITSLIENKMLKWT

                              IIIGQVASILYFTILLILMPTVSVIENNLLKW-

Rhesus macaque                TTIGQVASMMYFITILILMPLASLIENNLLKWT

Chimpanzee                    ITIGQMASVLYFTTILILMPIASLIENKMLEWT

Mouse                         IIIGQLASISYFSIILILMPISGIIEDKMLKLY

Rat                           IIIGQLASISYFSIILILMPISGIVEDKMLKWN

Pig                           IIIGQLASILYFLIILVLMPITSIIENNLLKW-

Bovine                        ITIGQLASVLYFLLILVLMPTAGTIENKLLKW-

Rabbit                        ITIGQVASVLYFTTILILMPLASLIENKILKW-

Goat                          IIIGQLASIMYFLIILVMMPVASTIENNLLKW-

Sheep                         IIIGQLASIMYFLIILVMMPVASIIENNLLKW-

Cat                           ITIGQLASILYFSTLLILMPISGIIENRLLKW-

Horse                         VIIGQLASILYFSLILIFMPLASTIENNLLKW-

Chicken                       IIIGQMASLSYFTILLILFPTIGTLENKMLNY-

Xenopus laevis                TMIGQLASVIYFSIFIIMFPLMGWVENKLLNW-

Zebrafish                     IIIGQMASILYFSLFLVLFPITGILENKALQWS

Caenorhabditis elegans        TILSPLFSFIYFGLAYLMLFI--FMSSKLLFK-

Drosophila                    VLIGQILTVVYFLYYLV-NPLITKWWDNLLN--

Slime mold                    LICGLYSTIAYFIYILVLFPCIYIVEKMIIKTI

Baker's yeast                 VLMGQIATFIYFAYFLIIVPVISTIENVLFYIG

Fission yeast                 ITIGAIATIFYFSYFFILIPVYTILGNTLIDLN

Sequence annotation in neighborhood: help 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.
TypePositionsDescription
Chain 1 – 380 Cytochrome b
Helix 365 – 376



Literature citations
Mitochondrial genome variation and the origin of modern humans.
Ingman M.; Kaessmann H.; Paeaebo S.; Gyllensten U.;
Nature 408:708-713(2000)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-378; VARIANTS ILE-7; SER-8; LEU-18; VAL-39; THR-78; THR-122; ALA-123; THR-153; ALA-194; THR-229; ILE-236; THR-306; THR-329; VAL-334; MET-353; MET-356 AND ILE-368; Major genomic mitochondrial lineages delineate early human expansions.
Maca-Meyer N.; Gonzalez A.M.; Larruga J.M.; Flores C.; Cabrera V.M.;
BMC Genet. 2:13-13(2001)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-378; VARIANTS ILE-7; SER-8; LEU-18; THR-122; VAL-164; 189-ILE-ALA-190 DELINS VAL-THR; ALA-194; THR-229; ILE-236; THR-330; ALA-360 AND ILE-368;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.