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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P36551: Variant p.Gly280Arg

Oxygen-dependent coproporphyrinogen-III oxidase, mitochondrial
Gene: CPOX
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Variant information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Glycine (G) to Arginine (R) at position 280 (G280R, p.Gly280Arg). 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 glycine (G) to large size and basic (R) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -2 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 HCP. Any additional useful information about the variant.


Sequence information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 454 The length of the canonical sequence.
Location on the sequence: help NYRYFEVEEADGNKQWWFGG G CDLTPTYLNQEDAVHFHRTL 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                         NYRYFEVEEADGNKQ-WWFGGGCDLTPTYLNQEDAVHFHRTL

Mouse                         NYRYFEVEEADGNTH-WWFGGGCDLTPTYLNQEDAVHFHRT

Rat                           NYRYFEVEEADGKMH-WWFGGGCDLTPTYLNREDAVHFHRT

Drosophila                    NYRYFEVETAKGEKQ-WWFGGGTDLTPYYLCEKDASHFHQT

Slime mold                    NVRYFEAGDV------WWFGGGVDLTPVYPKLDQVVEFHST

Baker's yeast                 NYRYFETWNQDGTPQTWWFGGGADLTPSYLYEEDGQLFHQL

Fission yeast                 NYRYFELVNSDGKKI-WWFGGGADLTPSILFEEDGKHFHKL
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 111 – 454 Oxygen-dependent coproporphyrinogen-III oxidase, mitochondrial
Alternative sequence 272 – 287 NKQWWFGGGCDLTPTY -> KGLRSYGKYCRAKCAF. In isoform 2.
Beta strand 273 – 284



Literature citations
A novel missense mutation in exon 4 of the human coproporphyrinogen oxidase gene in two patients with hereditary coproporphyria.
Daimon M.; Gojyou E.; Sugawara M.; Yamatani K.; Tominaga M.; Sasaki H.;
Hum. Genet. 99:199-201(1997)
Cited for: VARIANT HCP ARG-280;
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.