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UniProtKB/Swiss-Prot P08559: Variant p.Arg263Gly

Pyruvate dehydrogenase E1 component subunit alpha, somatic form, mitochondrial
Gene: PDHA1
Variant information

Variant position:  263
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 Arginine (R) to Glycine (G) at position 263 (R263G, p.Arg263Gly).
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 glycine (G)
The physico-chemical property of the reference and variant residues and the change implicated.

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

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

Sequence information

Variant position:  263
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  390
The length of the canonical sequence.

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.










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.

Chain 30 – 390 Pyruvate dehydrogenase E1 component subunit alpha, somatic form, mitochondrial
Modified residue 244 – 244 N6-acetyllysine; alternate
Modified residue 244 – 244 N6-succinyllysine; alternate
Modified residue 277 – 277 N6-succinyllysine
Helix 259 – 274

Literature citations

Mutations in the X-linked E1 alpha subunit of pyruvate dehydrogenase leading to deficiency of the pyruvate dehydrogenase complex.
Chun K.; McKay N.; Petrova-Benedict R.; Robinson B.H.;
Hum. Mol. Genet. 2:449-454(1993)
Cited for: VARIANTS PDHAD MET-167; THR-199; ALA-231; GLY-263 AND LEU-292;

Mutations in the X-linked E1 alpha subunit of pyruvate dehydrogenase: exon skipping, insertion of duplicate sequence, and missense mutations leading to the deficiency of the pyruvate dehydrogenase complex.
Chun K.; MacKay N.; Petrova-Benedict R.; Federico A.; Fois A.; Cole D.E.C.; Robertson E.; Robinson B.H.;
Am. J. Hum. Genet. 56:558-569(1995)
Cited for: VARIANTS PDHAD CYS-72; LEU-205; GLY-263; ARG-311 DEL AND HIS-378;

Mutation analysis of the pyruvate dehydrogenase E1 alpha gene in eight patients with a pyruvate dehydrogenase complex deficiency.
Lissens W.; de Meirleir L.; Seneca S.; Benelli C.; Marsac C.; Poll-The B.T.; Briones P.; Ruitenbeek W.; van Diggelen O.; Chaigne D.; Ramaekers V.; Liebaers I.;
Hum. Mutat. 7:46-51(1996)
Cited for: VARIANTS PDHAD CYS-72; ASP-113; ARG-162; GLY-263; HIS-288 AND CYS-302;

Biochemical and molecular analysis of an X-linked case of Leigh syndrome associated with thiamin-responsive pyruvate dehydrogenase deficiency.
Naito E.; Ito M.; Yokota I.; Saijo T.; Matsuda J.; Osaka H.; Kimura S.; Kuroda Y.;
J. Inherit. Metab. Dis. 20:539-548(1997)
Cited for: VARIANT PDHAD GLY-263;

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.