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Escherichia coli K-12 substr. MG1655 Reaction: [no EC number assigned]


Superclasses: Reactions Classified By Conversion TypeSimple ReactionsRedox Half-Reactions

Enzymes and Genes:
regulator of KefC-mediated potassium transport and quinone oxidoreductase: kefF
NAD(P)H:quinone oxidoreductase: wrbA
chromate reductase: yieF
NADPH quinone reductase: mdaB
malate:quinone oxidoreductase: mqo
D-amino acid dehydrogenase: dadA

Component of ETR: a D-amino acid + an electron-transfer quinone[inner membrane] + H2O → ammonium + a 2-oxo carboxylate + an electron-transfer quinol[inner membrane], D-alanine + an electron-transfer quinone[inner membrane] + H2O → ammonium + pyruvate + an electron-transfer quinol[inner membrane], (S)-dihydroorotate + an electron-transfer quinone[inner membrane] → orotate + an electron-transfer quinol[inner membrane], (S)-malate + an electron-transfer quinone[inner membrane] → oxaloacetate + an electron-transfer quinol[inner membrane], NADPH + an electron-transfer quinone[inner membrane] + H+ → NADP+ + an electron-transfer quinol[inner membrane], an electron-transfer quinone[inner membrane] + NAD(P)H + H+ → an electron-transfer quinol[inner membrane] + NAD(P)+

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.

Most BioCyc compounds have been protonated to a reference pH value of 7.3. Please see the PGDB Concepts Guide for more information.

Mass balance status: The right side is missing: charge: +2

Instance reactions:
ubiquinone-8[membrane] + 2 H+[in] + 2 e-[membrane] → ubiquinol-8[membrane] (no EC#)

a menaquinone[membrane] + 2 H+[in] + 2 e-[membrane] → a menaquinol[membrane] (no EC#)

a menaquinone[membrane] + 2 H+[out] + 2 e-[membrane] → a menaquinol[membrane] (no EC#)

a ubiquinone[membrane] + 2 H+[out] + 2 e-[membrane] → an ubiquinol[membrane] (no EC#)

a ubiquinone[membrane] + 2 H+[in] + 2 e-[membrane] → an ubiquinol[membrane] (no EC#)

Standard Reduction Potential (V): 0.11 V

Summary:
This half reaction stands for the case where the actual quinone species is still not known. And so, the standard reduction potential was arbitrarily set to zero, which is not going to be the correct value.


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of EcoCyc: Nucleic Acids Research 41:D605-12 2013
Page generated by Pathway Tools version 19.5 (software by SRI International) on Sun Feb 7, 2016, biocyc11.