Phycoerythrin evolution and diversification of spectral phenotype in marine Synechococcus and related picocyanobacteria

Molecular Phylogenetics and Evolution
R Craig Everroad, A Michelle Wood

Abstract

In marine Synechococcus there is evidence for the adaptive evolution of spectrally distinct forms of the major light harvesting pigment phycoerythrin (PE). Recent research has suggested that these spectral forms of PE have a different evolutionary history than the core genome. However, a lack of explicit statistical testing of alternative hypotheses or for selection on these genes has made it difficult to evaluate the evolutionary relationships between spectral forms of PE or the role horizontal gene transfer (HGT) may have had in the adaptive phenotypic evolution of the pigment system in marine Synechococcus. In this work, PE phylogenies of picocyanobacteria with known spectral phenotypes, including newly co-isolated strains of marine Synechococcus from the Gulf of Mexico, were constructed to explore the diversification of spectral phenotype and PE evolution in this group more completely. For the first time, statistical evaluation of competing evolutionary hypotheses and tests for positive selection on the PE locus in picocyanobacteria were performed. Genes for PEs associated with specific PE spectral phenotypes formed strongly supported monophyletic clades within the PE tree with positive directional selection driving evoluti...Continue Reading

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Citations

Dec 20, 2014·Environmental Microbiology·Sebastian SudekAlexandra Z Worden
Jul 3, 2013·Evolution; International Journal of Organic Evolution·Thorsten B H Reusch, Philip W Boyd
Mar 27, 2013·FEMS Microbiology Ecology·Cristiana CallieriRoberto Bertoni
Jul 28, 2016·The ISME Journal·Justine PitteraChristophe Six
Feb 12, 2017·Environmental Microbiology Reports·Alyse A Larkin, Adam C Martiny
Jul 22, 2017·Frontiers in Microbiology·Xiaomin XiaHongbin Liu
Mar 9, 2019·Proceedings of the National Academy of Sciences of the United States of America·Joseph E SanfilippoDavid M Kehoe
Feb 15, 2018·Proceedings of the National Academy of Sciences of the United States of America·Théophile GrébertLaurence Garczarek
Feb 26, 2021·Proceedings of the National Academy of Sciences of the United States of America·Théophile GrébertFrédéric Partensky
Feb 8, 2020·Analytical Chemistry·Lucas D SmithBrian T Cunningham

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