Cyanobacterial genes transmitted to the nucleus before divergence of red algae in the Chromista

Journal of Molecular Evolution
Hisayoshi NozakiTsuneyoshi Kuroiwa

Abstract

The plastids of red algae, green plants, and glaucophytes may have originated directly from a cyanobacterium-like prokaryote via primary endosymbiosis. In contrast, the plastids of other lineages of eukaryotic phototrophs appear to be the result of secondary or tertiary endosymbiotic events involving a phototrophic eukaryote and a eukaryotic host cell. Although phylogenetic analyses of multiple plastid genes from a wide range of eukaryotic lineages have been carried out, the phylogenetic positions of the secondary plastids of the Chromista (Heterokontophyta, Haptophyta and Cryptophyta) are ambiguous in a range of different analyses. This ambiguity may be the result of unusual substitutions or bias in the plastid genes established by the secondary endosymbiosis. In this study, we carried out phylogenetic analyses of five nuclear genes of cyanobacterial origin (6-phosphogluconate dehydrogenase [gnd], oxygen-evolving-enhancer [psbO], phosphoglycerate kinase [pgk], delta-aminolevulinic acid dehydratase [aladh], and ATP synthase gamma [atpC] genes), using the genome sequence data from the primitive red alga Cyanidioschyzon merolae 10D. The sequence data robustly resolved the origin of the cyanobacterial genes in the nuclei of the Ch...Continue Reading

Citations

Feb 16, 2005·Plant Physiology·Arthur R Grossman
Jun 15, 2006·BMC Evolutionary Biology·Nicola J PatronPatrick J Keeling
May 20, 2008·BMC Evolutionary Biology·Shinichiro MaruyamaHisayoshi Nozaki
Aug 12, 2009·BMC Evolutionary Biology·Shinichiro MaruyamaHisayoshi Nozaki
Apr 24, 2007·Molecular Phylogenetics and Evolution·M Virginia Sanchez-PuertaCharles F Delwiche
May 22, 2007·Molecular Biology and Evolution·Jason C SlotDavid S Hibbett

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