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A phylogenetically novel cyanobacterium most closely related to Gloeobacter
Grettenberger, Christen L Sumner, Dawn Y Wall, Kate Brown, C Titus Eisen, Jonathan A Mackey, Tyler J Hawes, Ian Jospin, Guillaume
Grettenberger, Christen L
Sumner, Dawn Y
Wall, Kate
Brown, C Titus
Eisen, Jonathan A
Mackey, Tyler J
Hawes, Ian
Jospin, Guillaume
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2020-05-18
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2019-10-17
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Abstract: Clues to the evolutionary steps producing innovations in oxygenic photosynthesis may be preserved in the genomes of organisms phylogenetically placed between non-photosynthetic Vampirovibrionia (formerly Melainabacteria) and the thylakoid-containing Cyanobacteria. However, only two species with published genomes are known to occupy this phylogenetic space, both within the genus Gloeobacter. Here, we describe nearly complete, metagenome-assembled genomes (MAGs) of an uncultured organism phylogenetically placed near Gloeobacter, for which we propose the name Candidatus Aurora vandensis {Au’ro.ra. L. fem. n. aurora, the goddess of the dawn in Roman mythology; van.de’nsis. N.L. fem. adj. vandensis of Lake Vanda, Antarctica}. The MAG of A. vandensis contains homologs of most genes necessary for oxygenic photosynthesis including key reaction center proteins. Many accessory subunits associated with the photosystems in other species either are missing from the MAG or are poorly conserved. The MAG also lacks homologs of genes associated with the pigments phycocyanoerethrin, phycoeretherin and several structural parts of the phycobilisome. Additional characterization of this organism is expected to inform models of the evolution of oxygenic photosynthesis.
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Christen L Grettenberger, Dawn Y Sumner, Kate Wall, C Titus Brown, Jonathan A Eisen, Tyler J Mackey, Ian Hawes, Guillaume Jospin, Anne D Jungblut, A phylogenetically novel cyanobacterium most closely related to Gloeobacter, The ISME Journal, Volume 14, Issue 8, August 2020, Pages 2142–2152, https://doi.org/10.1038/s41396-020-0668-5
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Copyright © The Author(s) 2020. This article is published with open access. The attached file is the published version of the article.
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1751-7362
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1751-7370
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openAccess