Proteome Response of a Metabolically Flexible Anoxygenic Phototroph to Fe(II) Oxidation.

ABSTRACT: The oxidation of Fe(II) by anoxygenic photosynthetic bacteria was likely a key contributor to Earth's biosphere prior to the evolution of oxygenic photosynthesis and is still found in a diverse range of modern environments. All known phototrophic Fe(II) oxidizers can utilize a wide range of substrates, thus making them very metabolically flexible. However, the underlying adaptations required to oxidize Fe(II), a potential stressor, are not completely understood. We used a combination of quantitative proteomics and cryogenic transmission electron microscopy (cryo-TEM) to compare cells of Rhodopseudomonas palustris TIE-1 grown photoautotrophically with Fe(II) or H₂ and photoheterotrophically with acetate. We observed unique proteome profiles for each condition, with differe

SUBMITTER: Bryce C 

PROVIDER: S-EPMC6070761 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature