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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P00156: Variant p.Phe276Leu

Cytochrome b
Gene: MT-CYB
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Variant information Variant position: help 276 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help US 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 Phenylalanine (F) to Leucine (L) at position 276 (F276L, p.Phe276Leu). 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 large size and aromatic (F) to medium size and hydrophobic (L) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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

Variant description: help In colorectal cancer. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 276 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 YTLANPLNTPPHIKPEWYFL F AYTILRSVPNKLGGVLALLL 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                         YTLANPLNTPPHIKPEWYFLFAYTILRSVPNKLGGVLALLL

Gorilla                       YTLANPLSTPPHIKPEWYFLFAYAILRSVPNKLGGVLALLL

                              YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVF

Rhesus macaque                YIPADPLNTPPHIKPEWYFLFAYTILRSIPNKLGGVLALFL

Chimpanzee                    YTLANPLNTPPHIKPEWYFLFAYTILRSIPNKLGGVLALLL

Mouse                         YMPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALIL

Rat                           YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVVALIL

Pig                           YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVA

Bovine                        YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALAF

Rabbit                        YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVL

Goat                          YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVL

Sheep                         YTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVL

Cat                           YIPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVL

Horse                         YTPANPLSTPPHIKPEWYFLFAYAILRSIPNKLGGVLALIL

Chicken                       FTPANPLVTPPHIKPEWYFLFAYAILRSIPNKLGGVLALAA

Xenopus laevis                FTPANPLITPPHIKPEWYFLFAYAILRSIPNKLGGVLALVL

Zebrafish                     FTPANPLVTPPHIKPEWYFLFAYAILRSIPNKLGGVLALLF

Caenorhabditis elegans        FIEADPMMSPVHIVPEWYFLFAYAILRAIPNKVLGVIALLM

Drosophila                    FIPANPLVTPAHIQPEWYFLFAYAILRSIPNKLGGVIALVL

Slime mold                    YLMADSNVTPAHIVPEWYLLPFYAMLRSIPNKVLGVLALVL

Baker's yeast                 YIPGNPLVTPASIVPEWYLLPFYAILRSIPDKLLGVITMFA

Fission yeast                 ALPADPLKTPMSIVPEWYLLPFYAILRAIPNFQLGVIAMLL

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 272 – 283



Literature citations
Somatic mutations of the mitochondrial genome in human colorectal tumours.
Polyak K.; Li Y.; Zhu H.; Lengauer C.; Willson J.K.V.; Markowitz S.D.; Trush M.A.; Kinzler K.W.; Vogelstein B.;
Nat. Genet. 20:291-293(1998)
Cited for: VARIANTS COLORECTAL CANCER HIS-80 AND LEU-276;
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.