Origins of a cyanobacterial 6-phosphogluconate dehydrogenase in plastid-lacking eukaryotes.

ABSTRACT:

Background

Plastids have inherited their own genomes from a single cyanobacterial ancestor, but the majority of cyanobacterial genes, once retained in the ancestral plastid genome, have been lost or transferred into the eukaryotic host nuclear genome via endosymbiotic gene transfer. Although previous studies showed that cyanobacterial gnd genes, which encode 6-phosphogluconate dehydrogenase, are present in several plastid-lacking protists as well as primary and secondary plastid-containing phototrophic eukaryotes, the evolutionary paths of these genes remain elusive.

Results

Here we show an extended phylogenetic analysis including novel gnd gene sequences from Excavata and Glaucophyta. Our analysis demonstrated the patchy distribution of the excavate genes in the gnd gene ph

SUBMITTER: Maruyama S 

PROVIDER: S-EPMC2416651 | biostudies-literature | 2008 May

REPOSITORIES: biostudies-literature