Project description:A thermophilic and hydrogenogenic carboxydotroph, Carboxydothermus pertinax, performs hydrogenogenic CO metabolism in which CODH-II couples with distally encoded ECH. To enhance our knowledge of its hydrogenogenic CO metabolism, we performed whole transcriptome analysis of C. pertinax grown under 100% CO or 100% N2 using RNA sequencing. Of the 2577 genes, 36 and 64 genes were differentially expressed genes (DEGs) with false discovery rate adjusted P value < 0.05 when grown under 100% CO or 100% N2, respectively. Most of the DEGs were components of 23 gene clusters, suggesting switch between metabolisms via intensive expression changes in a relatively low number of gene clusters. Of the 9 significantly expressed gene clusters under 100% CO, CODH-II and ECH gene clusters were found. Only the ECH gene cluster was regulated by the CO-responsive transcriptional factor CooA, suggesting that others were separately regulated in the same transcriptional cascade as the ECH gene cluster. Of the 14 significantly expressed gene clusters under 100% N2, ferrous iron transport gene cluster involved in anaerobic respiration and prophage region were found. Considering that the expression of the temperate phage was strictly repressed under 100% CO, hydrogenogenic CO metabolism might be stable for C. pertinax.

| S-EPMC6557876 | biostudies-literature

Draft Genome Sequences of Carboxydothermus pertinax and C. islandicus, Hydrogenogenic Carboxydotrophic Bacteria.

Project description:Carboxydothermus spp. are some of the most studied carbon monoxide-oxidizing anaerobic thermophiles. For further investigation into the carbon monoxide metabolism of Carboxydothermus spp., we report here the draft genome sequences of the hydrogenogenic carboxydotrophs Carboxydothermus pertinax (2.47 Mb; G+C content, 40.7%) and C. islandicus (2.39 Mb; G+C content, 42.0%).

| S-EPMC5323621 | biostudies-literature

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