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Not All That Glitters Is Gold: The Paradox of CO-dependent Hydrogenogenesis in Parageobacillus thermoglucosidasius

Aliyu, Habibu 1; Maayer, Pieter de; Neumann, Anke 1
1 Karlsruher Institut für Technologie (KIT)


The thermophilic bacterium Parageobacillus thermoglucosidasius has recently gained interest due to its ability to catalyze the water gas shift reaction, where the oxidation of carbon monoxide (CO) is linked to the evolution of hydrogen (H$_{2}$) gas. This phenotype is largely predictable based on the presence of a genomic region coding for a carbon monoxide dehydrogenase (CODH—Coo) and hydrogen evolving hydrogenase (Phc). In this work, seven previously uncharacterized strains were cultivated under 50% CO and 50% air atmosphere. Despite the presence of the coo—phc genes in all seven strains, only one strain, Kp1013, oxidizes CO and yields H$_{2}$. The genomes of the H$_{2}$ producing strains contain unique genomic regions that code for proteins involved in nickel transport and the detoxification of catechol, a by-product of a siderophore-mediated iron acquisition system. Combined, the presence of these genomic regions could potentially drive biological water gas shift (WGS) reaction in P. thermoglucosidasius.

Verlagsausgabe §
DOI: 10.5445/IR/1000141719
Veröffentlicht am 10.01.2022
DOI: 10.3389/fmicb.2021.784652
Zitationen: 2
Web of Science
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1664-302X
KITopen-ID: 1000141719
Erschienen in Frontiers in Microbiology
Verlag Frontiers Media SA
Band 12
Seiten 784652
Nachgewiesen in Scopus
Web of Science
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