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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O14521: Variant p.Tyr114Cys

Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
Gene: SDHD
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Variant information Variant position: help 114 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 Tyrosine (Y) to Cysteine (C) at position 114 (Y114C, p.Tyr114Cys). 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 large size and aromatic (Y) to medium size and polar (C) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In PPGL1. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 114 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 159 The length of the canonical sequence.
Location on the sequence: help SLAAALTLHGHWGLGQVVTD Y VHGDALQKAAKAGLLALSAL 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                         SLAAALTLHGHWGLGQVVTDYVH----GDALQKAAKAGLLAL---SAL

Mouse                         SLAAALTLHSHWGLGQVVTDYVH----GDTLPKAARAGLLA

Rat                           SLAAALTLHSHWGIGQVVTDYVH----GDALQKATKAGLLA

Pig                           SLAAALTLHGHWGIGQVVTDYVR----GDALQKVAKAGLLA

Bovine                        SLAATLTLHSHWGIGQVVTDYVH----GDAVQKAAKTGLLV

Sheep                         SLAATLTLHSHWGIGQVVTDYVH----GDAVQKAAKTGLLV

Chicken                       SLAAALTLHGHWGLGQVITDYVH----GDTPIKVANTGLYV

Xenopus tropicalis            SLAAALTLHGHWGLGQVVTDYVH----GDAKIKMANTSLFA

Caenorhabditis elegans        VLTVALTLHIHWGIHGVVYDYARPYVIGEAAAKAAHVGVYL

Drosophila                    LMAISVVIHTHWGVEAMVVDYMRPSVVGNVLPKVAHIALII

Baker's yeast                 FFSVMLLGYCYMEFNSCITDYIS----ERVYGVWHKYAMYM

Fission yeast                 ALACTLITHAHLGFESCVIDYFP----ARRFKKLSPLMHWI
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 57 – 159 Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
Topological domain 112 – 122 Mitochondrial matrix
Binding site 102 – 102 axial binding residue
Binding site 114 – 114
Alternative sequence 56 – 158 HSGSKAASLHWTSERVVSVLLLGLLPAAYLNPCSAMDYSLAAALTLHGHWGLGQVVTDYVHGDALQKAAKAGLLALSALTFAGLCYFNYHDVGICKAVAMLWK -> HWALDKLLLTMFMGMPCRKLPRQGFWHFQ. In isoform 3.
Alternative sequence 106 – 143 GLGQVVTDYVHGDALQKAAKAGLLALSALTFAGLCYFN -> LECNGAILARHDLGSARSQLTATSAFRVQAILLPQPPK. In isoform 4.
Helix 89 – 114



Literature citations
Novel mutations and the emergence of a common mutation in the SDHD gene causing familial paraganglioma.
Milunsky J.M.; Maher T.A.; Michels V.V.; Milunsky A.;
Am. J. Med. Genet. 100:311-314(2001)
Cited for: VARIANT PPGL1 CYS-114; Distinct clinical features of paraganglioma syndromes associated with SDHB and SDHD gene mutations.
Neumann H.P.H.; Pawlu C.; Peczkowska M.; Bausch B.; McWhinney S.R.; Muresan M.; Buchta M.; Franke G.; Klisch J.; Bley T.A.; Hoegerle S.; Boedeker C.C.; Opocher G.; Schipper J.; Januszewicz A.; Eng C.;
JAMA 292:943-951(2004)
Cited for: VARIANTS PPGL1 LEU-81; TYR-92; CYS-114 AND VAL-148;
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.