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Phylogeny and Evolutionary History of Respiratory Complex I Proteins in Melainabacteria
Grettenberger, Christen Sumner, Dawn Y Eisen, Jonathan A Mackey, Tyler J
Grettenberger, Christen
Sumner, Dawn Y
Eisen, Jonathan A
Mackey, Tyler J
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2021-06-18
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2020-11-12
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aerobic respiration
phylogenomics
Melainabacteria
Sericytochromatia
Cyanobacteria
evolution
phylogenomics
Melainabacteria
Sericytochromatia
Cyanobacteria
evolution
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The evolution of oxygenic photosynthesis was one of the most transformative evolutionary events in Earth’s history, leading eventually to the oxygenation of Earth’s atmosphere and, consequently, the evolution of aerobic respiration. Previous work has shown that the terminal electron acceptors (complex IV) of aerobic respiration likely evolved after the evolution of oxygenic photosynthesis. However, complex I of the respiratory complex chain can be involved in anaerobic processes and, therefore, may have pre-dated the evolution of oxygenic photosynthesis. If so, aerobic respiration may have built upon respiratory chains that pre-date the rise of oxygen in Earth’s atmosphere. The Melainabacteria provide a unique opportunity to examine this hypothesis because they contain genes for aerobic respiration but likely diverged from the Cyanobacteria before the evolution of oxygenic photosynthesis. Here, we examine the phylogenies of translated complex I sequences from 44 recently published Melainabacteria metagenome assembled genomes and genomes from other Melainabacteria, Cyanobacteria, and other bacterial groups to examine the evolutionary history of complex I. We find that complex I appears to have been present in the common ancestor of Melainabacteria and Cyanobacteria, supporting the idea that aerobic respiration built upon respiratory chains that pre-date the evolution of oxygenic photosynthesis and the rise of oxygen.
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Grettenberger, C.; Sumner, D.Y.; Eisen, J.A.; Jungblut, A.D.; Mackey, T.J. Phylogeny and Evolutionary History of Respiratory Complex I Proteins in Melainabacteria. Genes 2021, 12, 929. https://doi.org/10.3390/ genes12060929
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Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The attached file is the published version of the article.
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2073-4425
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2073-4425
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openAccess