Home  |  Contact

UniProtKB/Swiss-Prot P31040: Variant p.Arg554Trp

Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial
Gene: SDHA
Variant information

Variant position:  554
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 Tryptophan (W) at position 554 (R554W, p.Arg554Trp).
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 large size and aromatic (W)
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 LS.
Any additional useful information about the variant.

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



Sequence information

Variant position:  554
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  664
The length of the canonical sequence.

Location on the sequence:   EGCGKISKLYGDLKHLKTFD  R GMVWNTDLVETLELQNLMLC
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                         EGCGKISKLYGDL-KHLKTFDRGMVWNTDLVETLELQNLMLC

Mouse                         EGCEKISQLYGDL-KHLKTFDRGMVWNTDLVETLELQNLML

Rat                           EGCEKVSQLYGDL-QHLKTFDRGMVWNTDLVETLELQNLML

Pig                           EGCEKILRLYGDL-QHLKTFDRGMVWNTDLVETLELQNLML

Bovine                        EGCEKISSLYGDL-RHLKTFDRGMVWNTDLVETLELQNLML

Chicken                       EGCEKLSQIYCDL-AHLKTFDRGIVWNTDLVETLELQNLML

Xenopus tropicalis            EGCEKLSAINSTM-DDIKTFDRGIVWNTDLVETLELQNLML

Zebrafish                     EGCVKMESVYKSM-DDIKTFDRGIVWNTDLVETLELQNLML

Caenorhabditis elegans        EGVKVLSKLYKDQ-AHLNVADKGLVWNSDLIETLELQNLLI

Drosophila                    DGVNKMKEIYKQF-KDIKVVDRSLIWNSDLVETLELQNLLA

Slime mold                    EGVELIDKCARSLINDLKTTDRTMIWNTDLIESLELQNLMT

Baker's yeast                 EGVRNITAVEKTF-DDVKTTDRSMIWNSDLVETLELQNLLT

Fission yeast                 EGVKNIARVDGTY-KDIGIRDRGLIWNTDLVEALELRNLLT

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 43 – 664 Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial
Modified residue 538 – 538 N6-acetyllysine; alternate
Modified residue 538 – 538 N6-succinyllysine; alternate
Modified residue 541 – 541 N6-acetyllysine
Modified residue 547 – 547 N6-acetyllysine; alternate
Modified residue 547 – 547 N6-succinyllysine; alternate
Modified residue 550 – 550 N6-acetyllysine


Literature citations

Mutation of a nuclear succinate dehydrogenase gene results in mitochondrial respiratory chain deficiency.
Bourgeron T.; Rustin P.; Chretien D.; Birch-MacHin M.A.; Bourgeois M.; Viegas-Pequignot E.; Munnich A.; Roetig A.;
Nat. Genet. 11:144-149(1995)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 546-562; VARIANT LS TRP-554;

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.