Chemicals and Drugs

Electron Transport Complex III

A multisubunit enzyme complex that contains CYTOCHROME B GROUP; CYTOCHROME C1; and iron-sulfur centers. It catalyzes the oxidation of ubiquinol to UBIQUINONE, and transfers the electrons to CYTOCHROME C. In MITOCHONDRIA the redox reaction is coupled to the transport of PROTONS across the inner mitochondrial membrane.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A multisubunit enzyme complex that contains CYTOCHROME B GROUP; CYTOCHROME C1; and iron-sulfur centers. It catalyzes the oxidation of ubiquinol to UBIQUINONE, and transfers the electrons to CYTOCHROME C. In MITOCHONDRIA the redox reaction is coupled to the transport of PROTONS across the inner mitochondrial membrane.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

27 entry terms
  • Coenzyme Q-Cytochrome-c Reductase
  • Coenzyme QH2-Cytochrome-c Reductase
  • Complex III
  • Cytochrome b-c2 Oxidoreductase
  • Dihydroubiquinone-Cytochrome-c Reductase
  • QH(2)-Cytochrome-c Reductase
  • QH(2)-Ferricytochrome-c Oxidoreductase
  • Ubihydroquinone-Cytochrome-c Reductase
  • Ubiquinol-Cytochrome c Reductase
  • Ubiquinol-Cytochrome-c Reductase
  • Ubiquinone-Cytochrome b-c2 Oxidoreductase
  • Coenzyme Q Cytochrome c Reductase
  • Coenzyme QH2 Cytochrome c Reductase
  • Cytochrome b c2 Oxidoreductase
  • Dihydroubiquinone Cytochrome c Reductase
  • Reductase, Ubiquinol-Cytochrome c
  • Ubihydroquinone Cytochrome c Reductase
  • Ubiquinol Cytochrome c Reductase
  • Ubiquinone Cytochrome b c2 Oxidoreductase
  • Core I Protein, UCCreductase
  • Core I Protein, Ubiquinol-Cytochrome c Reductase
  • Core II Protein, UCCreductase
  • Core II Protein, Ubiquinol-Cytochrome c Reductase
  • Cytochrome bc1
  • Cytochrome bc1 Complex
  • Core I Protein, Ubiquinol Cytochrome c Reductase
  • Core II Protein, Ubiquinol Cytochrome c Reductase

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2004(1994); for CORE I PROTEIN, UBIQUINOL-CYTOCHROME C REDUCTASE & CORE II PROTEIN, UBIQUINOL-CYTOCHROME C REDUCTASE use ELECTRON TRANSPORT COMPLEX III (NM) 1991-2004

MeSH Record

Previous Indexing

  • Cytochrome Reductases (1974-1979)
  • Multienzyme Complexes (1973-1986)
  • Oxidoreductases (1966-1973)
  • Quinone Reductases (1975-1986)

MeSH Hierarchy

Tree Numbers

  1. D05.500w.562w.750.500
  2. D08.811w.600w.250.875.500
  3. D08.811w.682w.830.500
  4. D12.776w.157w.427w.374w.375w.954
  5. D12.776w.157w.530w.450w.250.875w.303
  6. D12.776w.543w.277.875.500
  7. D12.776w.543w.585w.450w.250.875w.468
  8. D12.776w.556w.579w.374w.375w.142

AMA Style

References

  1. National Library of Medicine. Electron Transport Complex III. Medical Subject Headings (MeSH). 2026. Unique ID D014450. http://id.nlm.nih.gov/mesh/2026/D014450
  2. Electron Transport Complex III. In: Wikidata. https://www.wikidata.org/wiki/Q21416976