The effect of methane and methanol on the terrestrial ammonia-oxidizing archaeon ‘Candidatus Nitrosocosmicus franklandus C13’

Oudova-Rivera, Barbora, Wright, Chloe L., Crombie, Andrew T., Murrell, J. Colin and Lehtovirta-Morley, Laura E. (2023) The effect of methane and methanol on the terrestrial ammonia-oxidizing archaeon ‘Candidatus Nitrosocosmicus franklandus C13’. Environmental Microbiology, 25 (5). pp. 948-961. ISSN 1462-2912

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Abstract

The ammonia monooxygenase (AMO) is a key enzyme in ammonia-oxidizing archaea, which are abundant and ubiquitous in soil environments. The AMO belongs to the copper-containing membrane monooxygenase (CuMMO) enzyme superfamily, which also contains particulate methane monooxygenase (pMMO). Enzymes in the CuMMO superfamily are promiscuous, which results in co-oxidation of alternative substrates. The phylogenetic and structural similarity between the pMMO and the archaeal AMO is well-established, but there is surprisingly little information on the influence of methane and methanol on the archaeal AMO and terrestrial nitrification. The aim of this study was to examine the effects of methane and methanol on the soil ammonia-oxidizing archaeon ‘Candidatus Nitrosocosmicus franklandus C13’. We demonstrate that both methane and methanol are competitive inhibitors of the archaeal AMO. The inhibition constants (Ki) for methane and methanol were 2.2 and 20 μM, respectively, concentrations which are environmentally relevant and orders of magnitude lower than those previously reported for ammonia-oxidizing bacteria. Furthermore, we demonstrate that a specific suite of proteins is upregulated and downregulated in ‘Ca. Nitrosocosmicus franklandus C13’ in the presence of methane or methanol, which provides a foundation for future studies into metabolism of one-carbon (C1) compounds in ammonia-oxidizing archaea.

Item Type:	Article
Additional Information:	Data availability statement: The data that support the findings of this study are available in the supplementary material of this article. Funding information: Barbora Oudova-Rivera was supported by the Royal Society Research Grant awarded to Laura E. Lehtovirta-Morley (RGF\R1\180100). Chloe L. Wright was supported by a UEA-funded PhD studentship and ERC Starting Grant awarded to Laura E. Lehtovirta-Morley (UNITY 852993). Laura E. Lehtovirta-Morley was supported by a Royal Society Dorothy Hodgkin Research Fellowship (DH150187) and ERC Starting Grant (UNITY 852993). Andrew T. Crombie was supported by a Leverhulme Trust Early Career Fellowship (ECF-2016-626) and J. Colin Murrell was supported by funding from the Earth and Life Systems Alliance of the Norwich Research Park.
Faculty \ School:	Faculty of Science > School of Biological Sciences Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups:	Faculty of Science > Research Groups > Molecular Microbiology Faculty of Science > Research Groups > Environmental Biology
Depositing User:	LivePure Connector
Date Deposited:	30 Nov 2024 01:45
Last Modified:	11 Dec 2024 01:42
URI:	https://ueaeprints.uea.ac.uk/id/eprint/97837
DOI:	10.1111/1462-2920.16316

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