Protein Information

Name electron transfer flavoprotein ubiquinone oxidoreductase
Synonyms ETF dehydrogenase; MADD; ETF QO; ETF ubiquinone oxidoreductase; ETFDH; ETFQO; Electron transfer flavoprotein; Electron transfer flavoprotein dehydrogenase…

Compound Information

Name rotenone
CAS

Reference List

PubMed Abstract RScore(About this table)
3620453 Frerman FE: Reaction of electron-transfer flavoprotein ubiquinone oxidoreductase with the mitochondrial respiratory chain. Biochim Biophys Acta. 1987 Sep 10;893(2):161-9.

Submitochondrial particles catalyze the reduction of electron-transfer flavoprotein (ETF) by NADH and succinate under anaerobic conditions in reactions that are totally inhibited by rotenone and thenoyl trifluoroacetone, respectively.
32(0,1,1,2) Details
8376393 Ma YC, Funk M, Dunham WR, Komuniecki R: Purification and characterization of electron-transfer flavoprotein: rhodoquinone oxidoreductase from anaerobic mitochondria of the adult parasitic nematode, Ascaris suum. J Biol Chem. 1993 Sep 25;268(27):20360-5.

Incubations of A. suum submitochondrial particles with NADH, 2-methylcrotonyl-CoA, purified A. suum electron-transfer flavoprotein and 2-methyl branched-chain enoyl-CoA reductase resulted in significant 2-methylbutyryl-CoA formation, which was inhibited by both rotenone and antisera to the purified ETF-RO.
32(0,1,1,2) Details
6704106 Komuniecki R, Fekete S, Thissen J: 2-Methylbutyryl CoA dehydrogenase from mitochondria of Ascaris suum and its relationship to NADH-dependent 2-methylcrotonyl CoA reduction. Biochem Biophys Res Commun. 1984 Feb 14;118(3):783-8.

In fact, incubations of A. suum mitochondrial membranes with electron-transfer flavoprotein, 2-methylbutyryl CoA dehydrogenase, 2-methylcrotonyl CoA and NADH resulted in a substantial, rotenone-sensitive, 2-methylbutyrate synthesis.
32(0,1,1,2) Details
3988734 Komuniecki R, Fekete S, Thissen-Parra J: Purification and characterization of the 2-methyl branched-chain Acyl-CoA dehydrogenase, an enzyme involved in NADH-dependent enoyl-CoA reduction in anaerobic mitochondria of the nematode, Ascaris suum. J Biol Chem. 1985 Apr 25;260(8):4770-7.

Incubations of A. suum submitochondrial particles, NADH, tiglyl-CoA, purified A. suum electron-transfer flavoprotein, and the 2-methyl branched-chain acyl-CoA dehydrogenase resulted in the rotenone-sensitive, dehydrogenase-dependent formation of 2-methylbutyryl-CoA.
6(0,0,1,1) Details
19366681 Hoffman DL, Brookes PS: Oxygen sensitivity of mitochondrial reactive oxygen species generation depends on metabolic conditions. J Biol Chem. 2009 Jun 12;284(24):16236-45. Epub 2009 Apr 14.


From such data, the apparent Km for O2 of putative ROS-generating sites within mitochondria was estimated as follows: 0.2, 0.9, 2.0, and 5.0 microM O2 for the complex I flavin site, complex I electron backflow, complex III QO site, and electron transfer flavoprotein quinone oxidoreductase of beta-oxidation, respectively.
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3337800 Kunz WS: Evaluation of electron-transfer flavoprotein and alpha-lipoamide dehydrogenase redox states by two-channel fluorimetry and its application to the investigation of beta-oxidation. Biochim Biophys Acta. 1988 Jan 20;932(1):8-16.

It was found that in the presence of rotenone, malonate and a redox buffer for the mitochondrial NAD-system, the beta-oxidation flux was sensitive to variations in redox state of respiratory chain electron carriers at low states of NAD reduction.
2(0,0,0,2) Details
1668635 Kunz WS: Application of the theory of steady-state flux control to mitochondrial beta-oxidation. Biomed Biochim Acta. 1991;50(12):1143-57.

The theory of steady-state flux control was applied to characterize the regulation of beta-oxidation flux in uncoupled rat liver mitochondria oxidizing palmitoylcarnitine in the presence of rotenone, malonate and the beta-hydroxybutyrate/acetoacetate redox buffer.
The flux control coefficients of carnitine palmitoyltransferase II, ETF:CoQ oxidoreductase and beta-hydroxybutyrate dehydrogenase were determined from elasticity coefficients obtained by measuring the flux dependencies of acyl-CoA and acetyl-CoA+CoASH concentrations, the electron transfer flavoprotein redox state, the CoQ redox state and the NAD redox state.
1(0,0,0,1) Details
12237311 St-Pierre J, Buckingham JA, Roebuck SJ, Brand MD: Topology of superoxide production from different sites in the mitochondrial electron transport chain. J Biol Chem. 2002 Nov 22;277(47):44784-90. Epub 2002 Sep 16.

However, when complex I was fully reduced using rotenone, rat mitochondria released significantly more hydrogen peroxide than pigeon mitochondria.
Complex I (and perhaps the fatty acid oxidation electron transfer flavoprotein and its oxidoreductase) released superoxide on the matrix side of the inner membrane, whereas center o of complex III released superoxide on the cytoplasmic side.
1(0,0,0,1) Details