Assessment of the Carbon Monoxide Metabolism of the Hyperthermophilic Sulfate-Reducing Archaeon Archaeoglobus fulgidus VC-16 by Comparative Transcriptome Analyses

Figure 4

Presentation of putative mechanisms of energy conservation in A. fulgidus during carboxydotrophic growth. Acetate generation is probably a result of substrate level phosphorylation (right). Energy conservation is also coupled to electron transport phosphorylation (left) when electron acceptors sulfate () or thiosulfate is present (). Dotted lines indicate pathways of electron flow. Probable or putative paths of electron transport from to the terminal electron acceptor are shown in green or light green, respectively. Names of gene products are highlighted accordingly: in bold: expressed at or upregulated to high signal intensity (>3); underlined: constitutively expressed. The colors indicate the condition corresponding to upregulation (as in Figure 1(b)): blue: S-CO; orange: T-CO; magenta: Ø-CO. Downregulated genes during Ø-CO: purple (for data, see Table S2 in Supplementary Material). Cofactors of the methyl-branch: methanophenazine (MF), 5,6,7,8-tetrahydromethanopterin (H₄MPT).