6hif

Structural highlights

Function

[HDH_KUEST] Catalyzes the four-electron oxidation of hydrazine to N2 (PubMed:21964329). The electrons derived from hydrazine oxidation may be transferred to the quinone pool and exploited to promote the generation of proton-motive force (pmf) across the anammoxosome membrane (PubMed:21964329, PubMed:23210799). Is involved in anaerobic ammonium oxidation (anammox), a biological process in which nitrite is used as the electron acceptor in the conversion of ammonium to dinitrogen gas (N2) and water; this bacterial process has a major role in the Earth's nitrogen cycle and has been estimated to synthesize up to 50% of the dinitrogen gas emitted into our atmosphere from the oceans (PubMed:21964329). Cannot oxidize hydroxylamine to NO (PubMed:21964329).^{[1] [2]}

References

1. ↑ Kartal B, Maalcke WJ, de Almeida NM, Cirpus I, Gloerich J, Geerts W, Op den Camp HJ, Harhangi HR, Janssen-Megens EM, Francoijs KJ, Stunnenberg HG, Keltjens JT, Jetten MS, Strous M. Molecular mechanism of anaerobic ammonium oxidation. Nature. 2011 Oct 2;479(7371):127-30. doi: 10.1038/nature10453. PMID:21964329 doi:http://dx.doi.org/10.1038/nature10453
2. ↑ Kartal B, de Almeida NM, Maalcke WJ, Op den Camp HJ, Jetten MS, Keltjens JT. How to make a living from anaerobic ammonium oxidation. FEMS Microbiol Rev. 2013 May;37(3):428-61. doi: 10.1111/1574-6976.12014. Epub, 2013 Jan 21. PMID:23210799 doi:http://dx.doi.org/10.1111/1574-6976.12014