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Frontiers news briefs: July 4
Date:7/4/2013

enzymes that are necessary for the second step in the reduction of nitrate to ammonium. Three research groups from the USA predicted and then experimentally tested a new pathway for nitrate reduction to ammonium. The novel aspect of this pathway is that hydroxylamine, a potent mutagen, appears to be a free intermediate between nitrite and ammonium. The key module in the pathway is a quinone-reactive protein coupled to a hydroxylamine dehydrogenase enzyme that works in reverse. Hydroxylamine dehydrogenase shares ancestry with certain nitrite reductases and the nitrite-reducing type may represent an evolutionary precursor of the variants that oxidize hydroxylamine to nitrite. This enzyme complex is also found in other ε-proteobacteria, including some pathogenic Campylobacteria.

Researcher contact:

Prof. Barbara Campbell
Department of Biological Sciences
Clemson University, USA
E-mail: bcampb7@clemson.edu

URL: http://www.frontiersin.org/Evolutionary_and_Genomic_Microbiology/10.3389/fmicb.2013.00180/abstract


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Contact: Gozde Zorlu
gozde.zorlu@frontiersin.org
Frontiers
Source:Eurekalert

Page: 1 2 3 4 5 6

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