Analysis of multiple haloarchaeal genomes suggests that the quinone-dependent respiratory nitric oxide reductase is an important source of nitrous oxide in hypersaline environments

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Title: Analysis of multiple haloarchaeal genomes suggests that the quinone-dependent respiratory nitric oxide reductase is an important source of nitrous oxide in hypersaline environments
Authors: Torregrosa-Crespo, Javier | González-Torres, Pedro | Bautista, Vanesa | Esclapez Espliego, Julia María | Pire, Carmen | Camacho, Mónica | Bonete, María-José | Richardson, David J. | Watmough, Nicholas J. | Martínez-Espinosa, Rosa María
Research Group/s: Bioquímica Aplicada/Applied Biochemistry (AppBiochem) | Biotecnología de Extremófilos (BIOTECEXTREM)
Center, Department or Service: Universidad de Alicante. Departamento de Agroquímica y Bioquímica
Keywords: Bioinformatics | Denitrification | Haloarchaea | Hypersaline environments | Nitric Oxide | Nitrous Oxide | Nitric Oxide Reductase
Knowledge Area: Bioquímica y Biología Molecular
Issue Date: 19-Sep-2017
Publisher: Wiley
Citation: Environmental Microbiology Reports. 2017, 9(6): 788-796. doi:10.1111/1758-2229.12596
Abstract: Microorganisms, including Bacteria and Archaea, play a key role in denitrification, which is the major mechanism by which fixed nitrogen returns to the atmosphere from soil and water. Whilst the enzymology of denitrification is well understood in Bacteria, the details of the last two reactions in this pathway, which catalyse the reduction of nitric oxide (NO) via nitrous oxide (N2O) to nitrogen (N2), are little studied in Archaea, and hardly at all in haloarchaea. This work describes an extensive interspecies analysis of both complete and draft haloarchaeal genomes aimed at identifying the genes that encode respiratory nitric oxide reductases (Nors). The study revealed that the only nor gene found in haloarchaea is one that encodes a single subunit quinone dependent Nor homologous to the qNor found in bacteria. This surprising discovery is considered in terms of our emerging understanding of haloarchaeal bioenergetics and NO management.
Sponsor: This work was funded by research grant from the MINECO Spain (CTM2013-43147-R) and Generalitat Valenciana (ACIF 2016/077).
URI: http://hdl.handle.net/10045/69875
ISSN: 1758-2229
DOI: 10.1111/1758-2229.12596
Language: eng
Type: info:eu-repo/semantics/article
Rights: © John Wiley & Sons, Inc.
Peer Review: si
Publisher version: http://dx.doi.org/10.1111/1758-2229.12596
Appears in Collections:INV - AppBiochem - Artículos de Revistas
INV - BIOTECEXTREM - Artículos de Revistas

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