RRC ID 21667
Author Takishita K, Yamaguchi H, Maruyama T, Inagaki Y.
Title A hypothesis for the evolution of nuclear-encoded, plastid-targeted glyceraldehyde-3-phosphate dehydrogenase genes in "chromalveolate" members.
Journal PLoS ONE
Abstract Eukaryotes bearing red alga-derived plastids--photosynthetic alveolates (dinoflagellates plus the apicomplexan Toxoplasma gondii plus the chromerid Chromera velia), photosynthetic stramenopiles, haptophytes, and cryptophytes--possess unique plastid-targeted glyceraldehyde-3-phosphate dehydrogenases (henceforth designated as "GapC1"). Pioneering phylogenetic studies have indicated a single origin of the GapC1 enzymes in eukaryotic evolution, but there are two potential idiosyncrasies in the GapC1 phylogeny: Firstly, the GapC1 tree topology is apparently inconsistent with the organismal relationship among the "GapC1-containing" groups. Secondly, four stramenopile GapC1 homologues are consistently paraphyletic in previously published studies, although these organisms have been widely accepted as monophyletic. For a closer examination of the above issues, in this study GapC1 gene sampling was improved by determining/identifying nine stramenopile and two cryptophyte genes. Phylogenetic analyses of our GapC1 dataset, which is particularly rich in the stramenopile homologues, prompt us to propose a new scenario that assumes multiple, lateral GapC1 gene transfer events to explain the incongruity between the GapC1 phylogeny and the organismal relationships amongst the "GapC1-containing" groups. Under our new scenario, GapC1 genes uniquely found in photosynthetic alveolates, photosynthetic stramenopiles, haptophytes, and cryptopyhytes are not necessarily a character vertically inherited from a common ancestor.
Volume 4(3)
Pages e4737
Published 2009
DOI 10.1371/journal.pone.0004737
PMID 19270733
PMC PMC2649427
MeSH Cell Nucleus / genetics* Eukaryota / classification Eukaryota / enzymology Eukaryota / genetics* Evolution, Molecular* Glyceraldehyde-3-Phosphate Dehydrogenases / genetics* Glyceraldehyde-3-Phosphate Dehydrogenases / metabolism Phylogeny Plastids / enzymology Plastids / genetics*
IF 2.766
Times Cited 17
Algae NIES-275 NIES-706 NIES-716 NIES-15