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HMDB Protein ID HMDBP00121
Secondary Accession Numbers
  • 5353
  • HMDBP09358
  • HMDBP09359
Name Succinate dehydrogenase cytochrome b560 subunit, mitochondrial
  1. CYBL
  2. Integral membrane protein CII-3
  3. QPs-1
  4. QPs1
  5. Succinate dehydrogenase complex subunit C
  6. Succinate-ubiquinone oxidoreductase cytochrome B large subunit
  7. SubName: cDNA FLJ57876, highly similar to Homo sapiens succinate dehydrogenase complex, subunit C, transcript variant 2, mRNA
  8. SubName: Succinate dehydrogenase complex, subunit C delta3 alternative splicing variant
  9. SubName: Succinate dehydrogenase complex, subunit C, integral membrane protein, 15kDa, isoform CRA_g
Gene Name SDHC
Protein Type Unknown
Biological Properties
General Function Involved in succinate dehydrogenase activity
Specific Function Membrane-anchoring subunit of succinate dehydrogenase (SDH) that is involved in complex II of the mitochondrial electron transport chain and is responsible for transferring electrons from succinate to ubiquinone (coenzyme Q).
  • 2-ketoglutarate dehydrogenase complex deficiency
  • Alzheimer disease
  • Citrate cycle (TCA cycle)
  • Citric Acid Cycle
  • Congenital lactic acidosis
  • Fumarase deficiency
  • Glutaminolysis and Cancer
  • Huntington disease
  • Mitochondrial complex II deficiency
  • Oxidative phosphorylation
  • Oxidative phosphorylation
  • Parkinson disease
  • Pyruvate dehydrogenase deficiency (E2)
  • Pyruvate dehydrogenase deficiency (E3)
  • The oncogenic action of 2-hydroxyglutarate
  • The oncogenic action of D-2-hydroxyglutarate in Hydroxygluaricaciduria
  • The Oncogenic Action of Fumarate
  • The oncogenic action of L-2-hydroxyglutarate in Hydroxygluaricaciduria
  • The Oncogenic Action of Succinate
  • tricarboxylic acid cycle
  • Warburg Effect
Ubiquinone-2 + Succinic acid → QH2 + Fumaric acid details
GO Classification
Biological Process
small molecule metabolic process
tricarboxylic acid cycle
respiratory electron transport chain
Cellular Component
mitochondrial respiratory chain complex II
integral to membrane
cell part
membrane part
plasma membrane part
plasma membrane succinate dehydrogenase complex
oxidoreductase activity, acting on the ch-ch group of donors
catalytic activity
electron carrier activity
succinate dehydrogenase activity
oxidoreductase activity
Molecular Function
electron carrier activity
metal ion binding
heme binding
succinate dehydrogenase activity
metabolic process
cellular metabolic process
cofactor metabolic process
coenzyme metabolic process
acetyl-coa metabolic process
acetyl-coa catabolic process
tricarboxylic acid cycle
Cellular Location
  1. Mitochondrion inner membrane
  2. Multi-pass membrane protein
Gene Properties
Chromosome Location 1
Locus 1q23.3
Gene Sequence
>510 bp
Protein Properties
Number of Residues 169
Molecular Weight 16650.185
Theoretical pI 9.307
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Succinate dehydrogenase cytochrome b560 subunit, mitochondrial
GenBank ID Protein 78096641
UniProtKB/Swiss-Prot ID Q99643
UniProtKB/Swiss-Prot Entry Name C560_HUMAN
PDB IDs Not Available
GenBank Gene ID U57877
GeneCard ID SDHC
GenAtlas ID SDHC
General References
  1. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [PubMed:15489334 ]
  2. Gregory SG, Barlow KF, McLay KE, Kaul R, Swarbreck D, Dunham A, Scott CE, Howe KL, Woodfine K, Spencer CC, Jones MC, Gillson C, Searle S, Zhou Y, Kokocinski F, McDonald L, Evans R, Phillips K, Atkinson A, Cooper R, Jones C, Hall RE, Andrews TD, Lloyd C, Ainscough R, Almeida JP, Ambrose KD, Anderson F, Andrew RW, Ashwell RI, Aubin K, Babbage AK, Bagguley CL, Bailey J, Beasley H, Bethel G, Bird CP, Bray-Allen S, Brown JY, Brown AJ, Buckley D, Burton J, Bye J, Carder C, Chapman JC, Clark SY, Clarke G, Clee C, Cobley V, Collier RE, Corby N, Coville GJ, Davies J, Deadman R, Dunn M, Earthrowl M, Ellington AG, Errington H, Frankish A, Frankland J, French L, Garner P, Garnett J, Gay L, Ghori MR, Gibson R, Gilby LM, Gillett W, Glithero RJ, Grafham DV, Griffiths C, Griffiths-Jones S, Grocock R, Hammond S, Harrison ES, Hart E, Haugen E, Heath PD, Holmes S, Holt K, Howden PJ, Hunt AR, Hunt SE, Hunter G, Isherwood J, James R, Johnson C, Johnson D, Joy A, Kay M, Kershaw JK, Kibukawa M, Kimberley AM, King A, Knights AJ, Lad H, Laird G, Lawlor S, Leongamornlert DA, Lloyd DM, Loveland J, Lovell J, Lush MJ, Lyne R, Martin S, Mashreghi-Mohammadi M, Matthews L, Matthews NS, McLaren S, Milne S, Mistry S, Moore MJ, Nickerson T, O'Dell CN, Oliver K, Palmeiri A, Palmer SA, Parker A, Patel D, Pearce AV, Peck AI, Pelan S, Phelps K, Phillimore BJ, Plumb R, Rajan J, Raymond C, Rouse G, Saenphimmachak C, Sehra HK, Sheridan E, Shownkeen R, Sims S, Skuce CD, Smith M, Steward C, Subramanian S, Sycamore N, Tracey A, Tromans A, Van Helmond Z, Wall M, Wallis JM, White S, Whitehead SL, Wilkinson JE, Willey DL, Williams H, Wilming L, Wray PW, Wu Z, Coulson A, Vaudin M, Sulston JE, Durbin R, Hubbard T, Wooster R, Dunham I, Carter NP, McVean G, Ross MT, Harrow J, Olson MV, Beck S, Rogers J, Bentley DR, Banerjee R, Bryant SP, Burford DC, Burrill WD, Clegg SM, Dhami P, Dovey O, Faulkner LM, Gribble SM, Langford CF, Pandian RD, Porter KM, Prigmore E: The DNA sequence and biological annotation of human chromosome 1. Nature. 2006 May 18;441(7091):315-21. [PubMed:16710414 ]
  3. Hirawake H, Taniwaki M, Tamura A, Kojima S, Kita K: Cytochrome b in human complex II (succinate-ubiquinone oxidoreductase): cDNA cloning of the components in liver mitochondria and chromosome assignment of the genes for the large (SDHC) and small (SDHD) subunits to 1q21 and 11q23. Cytogenet Cell Genet. 1997;79(1-2):132-8. [PubMed:9533030 ]
  4. Elbehti-Green A, Au HC, Mascarello JT, Ream-Robinson D, Scheffler IE: Characterization of the human SDHC gene encoding of the integral membrane proteins of succinate-quinone oxidoreductase in mitochondria. Gene. 1998 Jun 15;213(1-2):133-40. [PubMed:9714607 ]
  5. Niemann S, Muller U: Mutations in SDHC cause autosomal dominant paraganglioma, type 3. Nat Genet. 2000 Nov;26(3):268-70. [PubMed:11062460 ]
  6. McWhinney SR, Pasini B, Stratakis CA: Familial gastrointestinal stromal tumors and germ-line mutations. N Engl J Med. 2007 Sep 6;357(10):1054-6. [PubMed:17804857 ]