If an enzyme name is shown in bold, there is experimental evidence for this enzymatic activity.
Locations of Mapped Genes:
Synonyms: NADH to nitrate electron transfer
|Superclasses:||Degradation/Utilization/Assimilation → Inorganic Nutrients Metabolism → Nitrogen Compounds Metabolism → Nitrate Reduction|
|Generation of Precursor Metabolites and Energy → Electron Transfer|
|Generation of Precursor Metabolites and Energy → Respiration → Anaerobic Respiration|
In the anaerobic respiratory chain formed by NADH dehydrogenase and nitrate reductase the transfer of electrons from NADH to nitrate is coupled to the generation of a proton-motive force (H+/e- = 3) across the cytoplasmic membrane ([Cole68, Garland75, Haddock75] and see [Unden97]).
E. coli K-12 contains two NADH dehydrogenases - energy conserving NDH-I (shown in this pathway) and NDH-II which does not contribute to the proton gradient; both enzymes appear to be involved in anaerobic nitrate respiration [Bongaerts95, Tran97]. By analogy to the related enzyme from mitochondria, NDH-I is thought to function as a proton pump translocating 4H+ per NADH oxidised (2e-) [H+/e- = 2] however a lower ratio of 3H+/2e- has also been proposed [Bogachev96, Wikstrom12]. Nitrate induces the expression of the nuo operon (encoding NDH-I) in a NarL dependent manner [Bongaerts95]
E. coli K-12 also contains two energy conserving (H+/e- = 1) nitrate reductases. Expression of nitrate reductase A (NRA) occurs in response to high levels of nitrate in the environment whereas expression of nitrate reductase Z (NRZ) is not dependent on nitrate levels or anaerobiosis ([Wang99a] and see [Bonnefoy94]).
Quinones are the obligate redox carriers during anaerobic nitrate respiration; the concentration of menaquinone increases in cells grown anaerobically with nitrate while the concentration of ubiquinone decreases (as compared with cells grown aerobically) [Wallace77a]. Nitrate reductase A can use both menaquinol (shown in this pathway) and ubiquinol as electron donors [Wissenbach90, Wissenbach92]. In anaerobic growth with nitrate the major quinone is demethylmenaquinone (DMK) [Unden88]; an E. coli strain containing only demethylmenaquinone is unable to grow with nitrate as terminal reductase [Wissenbach92].
Variants: nitrate reduction III (dissimilatory)
Bogachev96: Bogachev AV, Murtazina RA, Skulachev VP (1996). "H+/e- stoichiometry for NADH dehydrogenase I and dimethyl sulfoxide reductase in anaerobically grown Escherichia coli cells." J Bacteriol 178(21);6233-7. PMID: 8892824
Bongaerts95: Bongaerts J, Zoske S, Weidner U, Unden G (1995). "Transcriptional regulation of the proton translocating NADH dehydrogenase genes (nuoA-N) of Escherichia coli by electron acceptors, electron donors and gene regulators." Mol Microbiol 16(3);521-34. PMID: 7565112
Haddock75: Haddock BA, Kendall-Tobias MW (1975). "Functional anaerobic electron transport linked to the reduction of nitrate and fumarate in membranes from Escherichia coli as demonstrated by quenching of atebrin fluorescence." Biochem J 152(3);655-9. PMID: 776172
Tran97: Tran QH, Bongaerts J, Vlad D, Unden G (1997). "Requirement for the proton-pumping NADH dehydrogenase I of Escherichia coli in respiration of NADH to fumarate and its bioenergetic implications." Eur J Biochem 244(1);155-60. PMID: 9063459
Unden88: Unden G (1988). "Differential roles for menaquinone and demethylmenaquinone in anaerobic electron transport of E. coli and their fnr-independent expression." Arch Microbiol 150(5);499-503. PMID: 2849923
Unden97: Unden G, Bongaerts J (1997). "Alternative respiratory pathways of Escherichia coli: energetics and transcriptional regulation in response to electron acceptors." Biochim Biophys Acta 1320(3);217-34. PMID: 9230919
Wallace77a: Wallace BJ, Young IG (1977). "Role of quinones in electron transport to oxygen and nitrate in Escherichia coli. Studies with a ubiA- menA- double quinone mutant." Biochim Biophys Acta 461(1);84-100. PMID: 195602
Wang99a: Wang H, Tseng CP, Gunsalus RP (1999). "The napF and narG nitrate reductase operons in Escherichia coli are differentially expressed in response to submicromolar concentrations of nitrate but not nitrite." J Bacteriol 181(17);5303-8. PMID: 10464201
Wissenbach90: Wissenbach U, Kroger A, Unden G (1990). "The specific functions of menaquinone and demethylmenaquinone in anaerobic respiration with fumarate, dimethylsulfoxide, trimethylamine N-oxide and nitrate by Escherichia coli." Arch Microbiol 154(1);60-6. PMID: 2204318
Wissenbach92: Wissenbach U, Ternes D, Unden G (1992). "An Escherichia coli mutant containing only demethylmenaquinone, but no menaquinone: effects on fumarate, dimethylsulfoxide, trimethylamine N-oxide and nitrate respiration." Arch Microbiol 1992;158(1);68-73. PMID: 1444716
Al12: Al Mamun AA, Lombardo MJ, Shee C, Lisewski AM, Gonzalez C, Lin D, Nehring RB, Saint-Ruf C, Gibson JL, Frisch RL, Lichtarge O, Hastings PJ, Rosenberg SM (2012). "Identity and function of a large gene network underlying mutagenic repair of DNA breaks." Science 338(6112);1344-8. PMID: 23224554
Amarneh03: Amarneh B, Vik SB (2003). "Mutagenesis of subunit N of the Escherichia coli complex I. Identification of the initiation codon and the sensitivity of mutants to decylubiquinone." Biochemistry 42(17);4800-8. PMID: 12718520
AriasCartin10: Arias-Cartin R, Lyubenova S, Ceccaldi P, Prisner T, Magalon A, Guigliarelli B, Grimaldi S (2010). "HYSCORE evidence that endogenous mena- and ubisemiquinone bind at the same Q site (Q(D)) of Escherichia coli nitrate reductase A." J Am Chem Soc 132(17);5942-3. PMID: 20387886
Arifuzzaman06: Arifuzzaman M, Maeda M, Itoh A, Nishikata K, Takita C, Saito R, Ara T, Nakahigashi K, Huang HC, Hirai A, Tsuzuki K, Nakamura S, Altaf-Ul-Amin M, Oshima T, Baba T, Yamamoto N, Kawamura T, Ioka-Nakamichi T, Kitagawa M, Tomita M, Kanaya S, Wada C, Mori H (2006). "Large-scale identification of protein-protein interaction of Escherichia coli K-12." Genome Res 16(5);686-91. PMID: 16606699
Augier93: Augier V, Asso M, Guigliarelli B, More C, Bertrand P, Santini CL, Blasco F, Chippaux M, Giordano G (1993). "Removal of the high-potential [4Fe-4S] center of the beta-subunit from Escherichia coli nitrate reductase. Physiological, biochemical, and EPR characterization of site-directed mutated enzymes." Biochemistry 32(19);5099-108. PMID: 8388253
Augier93a: Augier V, Guigliarelli B, Asso M, Bertrand P, Frixon C, Giordano G, Chippaux M, Blasco F (1993). "Site-directed mutagenesis of conserved cysteine residues within the beta subunit of Escherichia coli nitrate reductase. Physiological, biochemical, and EPR characterization of the mutated enzymes." Biochemistry 32(8);2013-23. PMID: 8383531
Auriol11: Auriol C, Bestel-Corre G, Claude JB, Soucaille P, Meynial-Salles I (2011). "Stress-induced evolution of Escherichia coli points to original concepts in respiratory cofactor selectivity." Proc Natl Acad Sci U S A 108(4);1278-83. PMID: 21205901
Avazeri97: Avazeri C, Turner RJ, Pommier J, Weiner JH, Giordano G, Vermeglio A (1997). "Tellurite reductase activity of nitrate reductase is responsible for the basal resistance of Escherichia coli to tellurite." Microbiology 143 ( Pt 4);1181-9. PMID: 9141681
Banci05: Banci L, Bertini I, Ciofi-Baffoni S, Chasapis CT, Hadjiliadis N, Rosato A (2005). "An NMR study of the interaction between the human copper(I) chaperone and the second and fifth metal-binding domains of the Menkes protein." FEBS J 272(3);865-71. PMID: 15670166
Baranova07: Baranova EA, Morgan DJ, Sazanov LA (2007). "Single particle analysis confirms distal location of subunits NuoL and NuoM in Escherichia coli complex I." J Struct Biol 159(2);238-42. PMID: 17360196
Baranova07a: Baranova EA, Holt PJ, Sazanov LA (2007). "Projection structure of the membrane domain of Escherichia coli respiratory complex I at 8 A resolution." J Mol Biol 366(1);140-54. PMID: 17157874
Belevich07: Belevich G, Euro L, Wikstrom M, Verkhovskaya M (2007). "Role of the conserved arginine 274 and histidine 224 and 228 residues in the NuoCD subunit of complex I from Escherichia coli." Biochemistry 46(2);526-33. PMID: 17209562
Belevich11: Belevich G, Knuuti J, Verkhovsky MI, Wikstrom M, Verkhovskaya M (2011). "Probing the mechanistic role of the long α-helix in subunit L of respiratory Complex I from Escherichia coli by site-directed mutagenesis." Mol Microbiol 82(5);1086-95. PMID: 22060017
Berks95: Berks BC, Ferguson SJ, Moir JW, Richardson DJ (1995). "Enzymes and associated electron transport systems that catalyse the respiratory reduction of nitrogen oxides and oxyanions." Biochim Biophys Acta 1232(3);97-173. PMID: 8534676
Berks95a: Berks BC, Page MD, Richardson DJ, Reilly A, Cavill A, Outen F, Ferguson SJ (1995). "Sequence analysis of subunits of the membrane-bound nitrate reductase from a denitrifying bacterium: the integral membrane subunit provides a prototype for the dihaem electron-carrying arm of a redox loop." Mol Microbiol 15(2);319-31. PMID: 7746153
Berrisford08: Berrisford JM, Thompson CJ, Sazanov LA (2008). "Chemical and NADH-induced, ROS-dependent, cross-linking between subunits of complex I from Escherichia coli and Thermus thermophilus." Biochemistry 47(39);10262-70. PMID: 18771280
Bertero03: Bertero MG, Rothery RA, Palak M, Hou C, Lim D, Blasco F, Weiner JH, Strynadka NC (2003). "Insights into the respiratory electron transfer pathway from the structure of nitrate reductase A." Nat Struct Biol 10(9);681-7. PMID: 12910261
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