A nitrite-oxidising bacterium constitutively consumes atmospheric hydrogen
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00560709" target="_blank" >RIV/60077344:_____/22:00560709 - isvavai.cz</a>
Result on the web
<a href="https://www.nature.com/articles/s41396-022-01265-0.pdf" target="_blank" >https://www.nature.com/articles/s41396-022-01265-0.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41396-022-01265-0" target="_blank" >10.1038/s41396-022-01265-0</a>
Alternative languages
Result language
angličtina
Original language name
A nitrite-oxidising bacterium constitutively consumes atmospheric hydrogen
Original language description
Chemolithoautotrophic nitrite-oxidising bacteria (NOB) of the genus Nitrospira contribute to nitrification in diverse natural environments and engineered systems. Nitrospira are thought to be well-adapted to substrate limitation owing to their high affinity for nitrite and capacity to use alternative energy sources. Here, we demonstrate that the canonical nitrite oxidiser Nitrospira moscoviensis oxidises hydrogen (H2) below atmospheric levels using a high-affinity group 2a nickel-iron hydrogenase [Km(app) = 32 nM]. Atmospheric H2 oxidation occurred under both nitrite-replete and nitrite-deplete conditions, suggesting low-potential electrons derived from H2 oxidation promote nitrite-dependent growth and enable survival during nitrite limitation. Proteomic analyses confirmed the hydrogenase was abundant under both conditions and indicated extensive metabolic changes occur to reduce energy expenditure and growth under nitrite-deplete conditions. Thermodynamic modelling revealed that H2 oxidation theoretically generates higher power yield than nitrite oxidation at low substrate concentrations and significantly contributes to growth at elevated nitrite concentrations. Collectively, this study suggests atmospheric H2 oxidation enhances the growth and survival of NOB amid variability of nitrite supply, extends the phenomenon of atmospheric H2 oxidation to an eighth phylum (Nitrospirota), and reveals unexpected new links between the global hydrogen and nitrogen cycles. Long classified as obligate nitrite oxidisers, our findings suggest H2 may primarily support growth and survival of certain NOB in natural environments.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10606 - Microbiology
Result continuities
Project
<a href="/en/project/GM21-17322M" target="_blank" >GM21-17322M: Illuminating the interactions between nitrification and methane oxidation and the ensuing ecological impacts</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The ISME Journal
ISSN
1751-7362
e-ISSN
1751-7370
Volume of the periodical
16
Issue of the periodical within the volume
9
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
2213-2219
UT code for WoS article
000815569000001
EID of the result in the Scopus database
2-s2.0-85132807367