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UniProtKB/Swiss-Prot P36551: Variant p.Trp427Arg

Oxygen-dependent coproporphyrinogen-III oxidase, mitochondrial
Gene: CPOX
Variant information

Variant position:  427
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 Tryptophan (W) to Arginine (R) at position 427 (W427R, p.Trp427Arg).
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 (W) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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 HCP.
Any additional useful information about the variant.



Sequence information

Variant position:  427
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  454
The length of the canonical sequence.

Location on the sequence:   LFTPGSRIESILMSLPLTAR  W EYMHSPSENSKEAEILEVLR
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                         LFTPGSRIESILMSLPLTARWEYMHSPSENSKEAEILEVLR

Mouse                         LFTPGSRIESILMSLPLTARWEYMHSPPENSKEAEILEVLR

Rat                           LFTPGSRIESILMSLPLTARWEYMHSPPENSKEAEILEVLR

Drosophila                    LYTPGARYESILMSLPLHARWEYMHEPKSQSEEGKLMKVLK

Slime mold                    ILSEG-RTESILMSLPAVCKWKYNYKPEENTPEANLLTFLR

Baker's yeast                 LRTPGSRVESILMSLPEHASWLYNHHPAPGSREAKLLEVTT

Fission yeast                 LQAPEPRVESILMTLPLHASWRYKYEPKQERHKA-LLKVTH

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.

TypePositionsDescription
Chain 111 – 454 Oxygen-dependent coproporphyrinogen-III oxidase, mitochondrial
Region 392 – 428 Important for dimerization
Alternative sequence 288 – 454 Missing. In isoform 2.


Literature citations

Systematic analysis of coproporphyrinogen oxidase gene defects in hereditary coproporphyria and mutation update.
Rosipal R.; Lamoril J.; Puy H.; da Silva V.; Gouya L.; de Rooij F.W.M.; Te Velde K.; Nordmann Y.; Martasek P.; Deybach J.-C.;
Hum. Mutat. 13:44-53(1999)
Cited for: VARIANTS HCP TRP-197; GLY-390 DEL AND ARG-427;

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.