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UniProtKB/Swiss-Prot Q99497: Variant p.Met26Ile

Parkinson disease protein 7
Gene: PARK7
Variant information

Variant position:  26
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 Methionine (M) to Isoleucine (I) at position 26 (M26I, p.Met26Ile).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
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 PARK7; does not affect protein stability and degradation; does not interfere with homodimerization; decreased detoxification acivity on methylglyocal-adducted CoA.
Any additional useful information about the variant.

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



Sequence information

Variant position:  26
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  189
The length of the canonical sequence.

Location on the sequence:   ALVILAKGAEEMETVIPVDV  M RRAGIKVTVAGLAGKDPVQC
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.

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
Lipidation 46 – 46 S-palmitoyl cysteine
Mutagenesis 10 – 10 L -> P. Abolishes detoxification acivity on methylglyocal-adducted CoA.
Mutagenesis 18 – 18 E -> A. Strongly decreases enzymatic activity. Almost abolishes detoxification acivity on methylglyocal-adducted CoA.
Mutagenesis 18 – 18 E -> D. Strongly decreases enzymatic activity.
Mutagenesis 18 – 18 E -> N. Strongly decreases enzymatic activity.
Mutagenesis 18 – 18 E -> Q. Strongly decreases enzymatic activity.
Mutagenesis 46 – 46 C -> A. Reduces protein stability. No effect on oxidation.
Mutagenesis 46 – 46 C -> A. Reduces protein stability. No effect on oxidation. Reduced localization in lipid rafts; when associated with A-106.
Mutagenesis 46 – 46 C -> S. No effect on mitochondrial translocation neither on deglycase activity.
Helix 16 – 28


Literature citations

A missense mutation (L166P) in DJ-1, linked to familial Parkinson's disease, confers reduced protein stability and impairs homo-oligomerization.
Moore D.J.; Zhang L.; Dawson T.M.; Dawson V.L.;
J. Neurochem. 87:1558-1567(2003)
Cited for: DEGRADATION BY THE PROTEASOME; CHARACTERIZATION OF VARIANTS PARK7 ILE-26 AND PRO-166;

Parkinson's disease-related DJ-1 functions in thiol quality control against aldehyde attack in vitro.
Matsuda N.; Kimura M.; Queliconi B.B.; Kojima W.; Mishima M.; Takagi K.; Koyano F.; Yamano K.; Mizushima T.; Ito Y.; Tanaka K.;
Sci. Rep. 7:12816-12816(2017)
Cited for: FUNCTION; MUTAGENESIS OF LEU-10; GLU-18; CYS-106 AND ALA-179; CHARACTERIZATION OF VARIANTS PARK7 ILE-26; ASP-64; THR-104; ALA-149 AND PRO-166; CHARACTERIZATION OF VARIANTS SER-39 AND LYS-163;

The role of pathogenic DJ-1 mutations in Parkinson's disease.
Abou-Sleiman P.M.; Healy D.G.; Quinn N.; Lees A.J.; Wood N.W.;
Ann. Neurol. 54:283-286(2003)
Cited for: VARIANTS PARK7 ILE-26 AND ALA-149; VARIANT GLN-98;

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.