MeSH Browser

MeSH Heading: Electron Transport Complex III
Tree Number(s): D05.500.562.750.500; D08.811.600.250.875.500; D08.811.682.830.500; D12.776.157.427.374.375.954; D12.776.157.530.450.250.875.303; D12.776.543.277.875.500; D12.776.543.585.450.250.875.468; D12.776.556.579.374.375.142
Unique ID: D014450
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D014450
Scope Note: 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.
Entry Term(s): Coenzyme Q-Cytochrome-c Reductase; Coenzyme QH2-Cytochrome-c Reductase; Complex III; Core I Protein, UCCreductase; Core I Protein, Ubiquinol-Cytochrome c Reductase; Core II Protein, UCCreductase; Core II Protein, Ubiquinol-Cytochrome c Reductase; Cytochrome b-c2 Oxidoreductase; Cytochrome bc1; Cytochrome bc1 Complex; 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
Registry Numbers: EC 7.1.1.8; 139047-33-9; 139047-31-7; EC 1.10.2.2
Related Numbers: 139047-31-7; 139047-33-9; 9027-03-6; EC 1.10.2.2
CAS Type 1 Name: Ubiquinol-ferricytochrome-c oxidoreductase
Previous Indexing: Cytochrome Reductases (1974-1979); Multienzyme Complexes (1973-1986); Oxidoreductases (1966-1973); Quinone Reductases (1975-1986)
Public MeSH Note: 2004; see UBIQUINOL-CYTOCHROME-C REDUCTASE 1994-2003, see UBIQUINOL-CYTOCHROME C REDUCTASE 1987-1993; CORE I PROTEIN, UBIQUINOL-CYTOCHROME C REDUCTASE & CORE II PROTEIN, UBIQUINOL-CYTOCHROME C REDUCTASE were indexed under NUCLEAR PROTEINS 1991-2003
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
Date Established: 1987/01/01
Date of Entry: 1986/06/12
Revision Date: 2019/07/05

Allowable Qualifiers: administration & dosage (AD)

adverse effects (AE)

analysis (AN)

antagonists & inhibitors (AI)

biosynthesis (BI)

blood (BL)

cerebrospinal fluid (CF)

chemical synthesis (CS)

chemistry (CH)

classification (CL)

deficiency (DF)

drug effects (DE)

economics (EC)

genetics (GE)

history (HI)

immunology (IM)

isolation & purification (IP)

metabolism (ME)

pharmacokinetics (PK)

pharmacology (PD)

physiology (PH)

poisoning (PO)

radiation effects (RE)

standards (ST)

supply & distribution (SD)

therapeutic use (TU)

toxicity (TO)

ultrastructure (UL)

urine (UR)

Macromolecular Substances [D05]
- Multiprotein Complexes [D05.500]
  - Multienzyme Complexes [D05.500.562]
    - Succinate Cytochrome c Oxidoreductase [D05.500.562.750]
      - Electron Transport Complex II [D05.500.562.750.249]
      - Electron Transport Complex III [D05.500.562.750.500]

Enzymes and Coenzymes [D08]
- Enzymes [D08.811]
  - Multienzyme Complexes [D08.811.600]
    - Electron Transport Chain Complex Proteins [D08.811.600.250]
      - Succinate Cytochrome c Oxidoreductase [D08.811.600.250.875]
        
        Electron Transport Complex II [D08.811.600.250.875.249]
        
        Electron Transport Complex III [D08.811.600.250.875.500]

Enzymes and Coenzymes [D08]
- Enzymes [D08.811]
  - Oxidoreductases [D08.811.682]
    - Succinate Cytochrome c Oxidoreductase [D08.811.682.830]
      - Electron Transport Complex II [D08.811.682.830.249]
      - Electron Transport Complex III [D08.811.682.830.500]

Amino Acids, Peptides, and Proteins [D12]
- Proteins [D12.776]
  - Carrier Proteins [D12.776.157]
    - Iron-Binding Proteins [D12.776.157.427]
      - Nonheme Iron Proteins [D12.776.157.427.374]
        
        Iron-Sulfur Proteins [D12.776.157.427.374.375]
        
        Adrenodoxin [D12.776.157.427.374.375.025]
        
        Ferredoxin-Nitrite Reductase [D12.776.157.427.374.375.150]
        
        Ferredoxins [D12.776.157.427.374.375.275]
        
        Electron Transport Complex I [D12.776.157.427.374.375.863]
        
        Electron Transport Complex II [D12.776.157.427.374.375.909]
        
        Electron Transport Complex III [D12.776.157.427.374.375.954]
        
        Ferrochelatase [D12.776.157.427.374.375.957]
        
        Frataxin [D12.776.157.427.374.375.959]
        
        Iron Regulatory Protein 1 [D12.776.157.427.374.375.960]
        
        Iron Regulatory Protein 2 [D12.776.157.427.374.375.961]
        
        Nitrate Reductase (NAD(P)H) [D12.776.157.427.374.375.977]
        
        Nitrate Reductase (NADPH) [D12.776.157.427.374.375.988]

Amino Acids, Peptides, and Proteins [D12]
- Proteins [D12.776]
  - Carrier Proteins [D12.776.157]
    - Membrane Transport Proteins [D12.776.157.530]
      - Ion Pumps [D12.776.157.530.450]
        
        Cation Transport Proteins [D12.776.157.530.450.250]
        
        Proton Pumps [D12.776.157.530.450.250.875]
        
        Bacteriorhodopsins [D12.776.157.530.450.250.875.249]
        
        Electron Transport Complex I [D12.776.157.530.450.250.875.300]
        
        Electron Transport Complex III [D12.776.157.530.450.250.875.303]
        
        Electron Transport Complex IV [D12.776.157.530.450.250.875.304]
        
        Inorganic Pyrophosphatase [D12.776.157.530.450.250.875.487]
        
        Photosystem I Protein Complex [D12.776.157.530.450.250.875.492]
        
        Proton-Translocating ATPases [D12.776.157.530.450.250.875.500]

Amino Acids, Peptides, and Proteins [D12]
- Proteins [D12.776]
  - Membrane Proteins [D12.776.543]
    - Electron Transport Chain Complex Proteins [D12.776.543.277]
      - Succinate Cytochrome c Oxidoreductase [D12.776.543.277.875]
        
        Electron Transport Complex II [D12.776.543.277.875.249]
        
        Electron Transport Complex III [D12.776.543.277.875.500]

Amino Acids, Peptides, and Proteins [D12]
- Proteins [D12.776]
  - Membrane Proteins [D12.776.543]
    - Membrane Transport Proteins [D12.776.543.585]
      - Ion Pumps [D12.776.543.585.450]
        
        Cation Transport Proteins [D12.776.543.585.450.250]
        
        Proton Pumps [D12.776.543.585.450.250.875]
        
        Bacteriorhodopsins [D12.776.543.585.450.250.875.249]
        
        Cytochrome b6f Complex [D12.776.543.585.450.250.875.311]
        
        Electron Transport Complex I [D12.776.543.585.450.250.875.437]
        
        Electron Transport Complex III [D12.776.543.585.450.250.875.468]
        
        Electron Transport Complex IV [D12.776.543.585.450.250.875.484]
        
        Inorganic Pyrophosphatase [D12.776.543.585.450.250.875.487]
        
        Photosystem I Protein Complex [D12.776.543.585.450.250.875.492]
        
        Proton-Translocating ATPases [D12.776.543.585.450.250.875.500]

Amino Acids, Peptides, and Proteins [D12]
- Proteins [D12.776]
  - Metalloproteins [D12.776.556]
    - Iron-Binding Proteins [D12.776.556.579]
      - Nonheme Iron Proteins [D12.776.556.579.374]
        
        Iron-Sulfur Proteins [D12.776.556.579.374.375]
        
        Adrenodoxin [D12.776.556.579.374.375.025]
        
        Electron Transport Complex I [D12.776.556.579.374.375.140]
        
        Electron Transport Complex II [D12.776.556.579.374.375.141]
        
        Electron Transport Complex III [D12.776.556.579.374.375.142]
        
        Ferredoxin-Nitrite Reductase [D12.776.556.579.374.375.150]
        
        Ferredoxins [D12.776.556.579.374.375.275]
        
        Ferrochelatase [D12.776.556.579.374.375.617]
        
        Frataxin [D12.776.556.579.374.375.789]
        
        Iron Regulatory Protein 1 [D12.776.556.579.374.375.960]
        
        Iron Regulatory Protein 2 [D12.776.556.579.374.375.962]
        
        Nitrate Reductase (NAD(P)H) [D12.776.556.579.374.375.977]
        
        Nitrate Reductase (NADPH) [D12.776.556.579.374.375.988]

Electron Transport Complex III Preferred

Core I Protein, Ubiquinol-Cytochrome c Reductase Narrower

Core II Protein, Ubiquinol-Cytochrome c Reductase Narrower

Cytochrome bc1 Narrower

Electron Transport Complex III MeSH Descriptor Data 2025