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Standard Name


Gene Synonym(s)

ECK2196, b2204, JW2192, yejZ[1], yejZ

Product Desc.

ferredoxin-type protein[2][3];

Component of NapGH, alternative quinol dehydrogenase[3]; periplasmic nitrate reductase[2][3]

Quinol dehydrogenase, membrane protein; polyferredoxin; mediates electron transfer from ubiquinol/naphthoquinone to NapAB, via NapC; non-haem, iron-sulphur protein[4]

Product Synonyms(s)

ferredoxin-type protein essential for electron transfer from ubiquinol to periplasmic nitrate reductase (NapAB)[1], B2204[2][1], YejZ[2][1], NapH[2][1] , ECK2196, JW2192, yejZ, b2204

Function from GO

<GO_nr />

Knock-Out Phenotype

transcription unit(s): napFDAGHBC[2], napFDAGHBC-ccmABCDEFGH[2], aeg-46.5

Quick Links

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NapH is a four TM helix membrane protein, N- and C-in, with cytoplasmic C-terminal iron-sulfur cluster domain, using fusions and Westerns blots (Brondijk, 2002). NapH not required for menaquinol transfer (Brondijk, 2002). napH and yccM are paralogs.[4]


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  1. 1.0 1.1 1.2 1.3 1.4 Riley, M. et al. (2006) Nucleic Acids Res 34:1-6 (corrected supplemental data from B. Wanner)
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 EcoCyc (release 10.6; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  3. 3.0 3.1 3.2 EcoCyc (release 11.1; 2007) Keseler, IM et al. (2005) Nucleic Acids Res. 33(Database issue):D334-7
  4. 4.0 4.1 EcoGene: Rudd, KE (2000) EcoGene: a genome sequence database for Escherichia coli K-12. Nucleic Acids Res 28:60-4.