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UniProtKB/Swiss-Prot P06132: Variant p.Arg142Gln

Uroporphyrinogen decarboxylase
Gene: UROD
Variant information

Variant position:  142
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  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:  From Arginine (R) to Glutamine (Q) at position 142 (R142Q, p.Arg142Gln).
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 basic (R) to medium size and polar (Q)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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:  In FPCT.
Any additional useful information about the variant.

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



Sequence information

Variant position:  142
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  367
The length of the canonical sequence.

Location on the sequence:   RDPEVVASELGYVFQAITLT  R QRLAGRVPLIGFAGAPWTLM
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                         RDPEVVASELGYVFQAITLTRQRLAGRVPLIGFAGAPWTLM

Mouse                         RDPAAAASELGYVFQAITLTRQRLAGRVPLIGFAGAPWTLM

Sheep                         RDPATVASELGYVFQAITLTRQQLAGRVPLIGFAGAPWTLM

Zebrafish                     KTQVDVYSELDYVFKAITLTRHKIEGKVPLIGFTGAPWTLM

Drosophila                    -TPDGALSRLSYVGDAITMMRHKLEGRVPLIGFTGAPWTLM

Slime mold                    QFPVDVNKELGYVFDALTLTRKRLEGRVPLIGFTGAPWTLM

Baker's yeast                 DYKVDVLKELDWAFKAITMTRIKLDGEVPLFGFCGGPWTLM

Fission yeast                 EKTPNISAKLGYVMDAISLTREKLDGQVPLMGFSGAPWTIM

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 1 – 367 Uroporphyrinogen decarboxylase
Helix 132 – 145


Literature citations

Seven novel point mutations in the uroporphyrinogen decarboxylase (UROD) gene in patients with familial porphyria cutanea tarda (f-PCT).
Cappellini M.D.; Martinez Di Montemuros F.; Tavazzi D.; Fargion S.; Pizzuti A.; Comino A.; Cainelli T.; Fiorelli G.;
Hum. Mutat. 17:350-350(2001)
Cited for: VARIANTS FPCT GLN-142; GLN-161; PHE-219 AND SER-235;

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.