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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P06132: Variant p.Met165Arg

Uroporphyrinogen decarboxylase
Gene: UROD
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Variant information Variant position: help 165 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 Methionine (M) to Arginine (R) at position 165 (M165R, p.Met165Arg). 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 hydrophobic (M) to large size and basic (R) 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

Variant description: help In FPCT; activity < 2%. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 165 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 367 The length of the canonical sequence.
Location on the sequence: help LAGRVPLIGFAGAPWTLMTY M VEGGGSSTMAQAKRWLYQRP 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                         LAGRVPLIGFAGAPWTLMTYMVEGGGSSTMAQAKRWLYQRP

Mouse                         LAGRVPLIGFAGAPWTLMTYMVEGGSSSTMAQAKRWLYQRP

Sheep                         LAGRVPLIGFAGAPWTLMTYMVEGGGSSTMSQAKRWLYQRP

Zebrafish                     IEGKVPLIGFTGAPWTLMSYMIEGGGSATHSKAKRWLYRYP

Drosophila                    LEGRVPLIGFTGAPWTLMGYMIEGGGSKTMSKAKAWLNEHP

Slime mold                    LEGRVPLIGFTGAPWTLMTYCIEGSGGTTMSNSKSWLYKHP

Baker's yeast                 LDGEVPLFGFCGGPWTLMVYMTEGGGSRLFRFAKQWINMYP

Fission yeast                 LDGQVPLMGFSGAPWTIMAYMIEGGGSKTFAKAKSWLFRYP

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 – 367 Uroporphyrinogen decarboxylase
Binding site 164 – 164
Mutagenesis 164 – 164 Y -> F. 25-30% of wild-type activity.
Helix 158 – 167



Literature citations
Functional consequences of naturally occurring mutations in human uroporphyrinogen decarboxylase.
Phillips J.D.; Parker T.L.; Schubert H.L.; Whitby F.G.; Hill C.P.; Kushner J.P.;
Blood 98:3179-3185(2001)
Cited for: X-RAY CRYSTALLOGRAPHY (2.1 ANGSTROMS) OF VARIANTS FPCT ASP-156; LEU-232 AND THR-260; FUNCTION; CATALYTIC ACTIVITY; PATHWAY; VARIANTS FPCT GLU-25; SER-80; GLN-134; ASP-156; ARG-165; LYS-167; PRO-193; LEU-232; GLN-253 AND THR-260; CHARACTERIZATION OF VARIANTS FPCT GLU-25; SER-80; GLN-134; ASP-156; ARG-165; LYS-167; PRO-193; LEU-232; GLN-253 AND THR-260; Familial porphyria cutanea tarda: characterization of seven novel uroporphyrinogen decarboxylase mutations and frequency of common hemochromatosis alleles.
Mendez M.; Sorkin L.; Rossetti M.V.; Astrin K.H.; Batlle A.M.C.; Parera V.E.; Aizencang G.I.; Desnick R.J.;
Am. J. Hum. Genet. 63:1363-1375(1998)
Cited for: VARIANTS FPCT ARG-165; PHE-195; LYS-304 AND HIS-332;
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.