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Table 5 Comparison of components of the respiratory chains deduced from the genomes of L. hongkongensis, N. meningitidis, N. gonorrhoeae, C. violaceum, E. coli and C. jejuni

From: General metabolism of Laribacter hongkongensis: a genome-wide analysis

Pathway/enzymes L. hongkongensis HLHK9 C. violaceum ATCC 12472 N. gonorrhoeae FA 1090 N. meningitidis MC58 E. coli K12 MG1655 C. jejuni NCTC 11168
Electron donors       
   NADH dehydrogenasea I I and II I and II I and II I and II Ib
   Succinate dehydrogenase + + + + + +
   Rnf-type electron transport complex + - - - + -
   Formate dehydrogenase + + - - + +
   Proline dehydrogenase + + + + + +
   Electron-transferring flavoprotein dehydrogenase + + + + + -
   D-amino acid dehydrogenase + + + + + -
Electron acceptors for aerobic respiration       
   Cytochrome oxidase (aa 3 type) + + - - + -
   Cytochrome oxidase (cbb 3 type) + + + + - +
   Cytochrome oxidase (bd type) + + - - + +
Electron acceptors for anaerobic respiration       
   Periplasmic nitrate reductase Nap type + napA onlyc - - + +
   Nitrate reductase Nar type - + - - + -
   Fumarate reductase + + + + + +
   DMSO reductase + - - - + -
   Tetrathionate reductase + - - - - -
F1F0ATP synthase + + + + + +
  1. aTwo types of NADH dehydrogenases (NDH) can function in the respiratory complex I in bacteria. Type I NDH is a proton pumping NADH:ubiquinone oxidoreductase that transfer electron from NADH to ubiquinone for generation of electrochemical proton gradient [75]. Type II NDH is a monomeric enzyme in which NADH oxidation is not coupled to proton pumping [76].
  2. bThe gene cluster that encodes NADH dehydrogenase I in most bacteria are consisted of 14 different genes. C. jejuni contains 12 of the 14 genes in which nuoE and nuoF are absent [15].
  3. cThe basic gene components for periplasmic Nap type nitrate reductase to be regarded as functional are napABCD [68]. C. violaceum contains only napA.