title: Partial sequence of ribulose-1,5-bisphosphate carboxylase/oxygenase and the phylogeny of Prochloron and Prochlorococcus (Prochlorales).
abstract: The prochlorophytes, oxygenic photosynthetic prokaryotes having no phycobiliprotein but possessing chlorophylls a and b, have been proposed to have a common ancestry with green chloroplasts, yet this is still controversal. We report here that partial sequence comparisons of the large subunit of ribulose-1,5'-bisphosphate carboxylase/oxygenase, including sequence data from two prochlorophytes, Prochlorococcus and Prochloron, indicate that Prochlorococcus is more closely related to a photosynthetic bacterium, Chromatium vinosum (gamma-purple bacteria), than to cyanobacteria, while Prochloron is closely related to the prochlorophyte Prochlorothrix and to cyanobacteria. The molecular phylogenetic tree indicates that a common ancestor of Prochlorococcus and gamma-purple bacteria branched off from the land plant lineage earlier than Prochloron, Prochlorothrix, and cyanobacteria.
authors.affiliation: Marine Biotechnology Institute (MBI), Shimizu Laboratories, Shizuoka, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Shimada
authors.forename: S
authors.initials: S
authors.lastname: Kanai
authors.forename: T
authors.initials: T
authors.lastname: Maruyama
mesh_terms: D000595:Amino Acid Sequence; D002844:Chromatium / Q000235:genetics; D000458:Cyanobacteria / Q000201:enzymology / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010944:Plants / Q000235:genetics; D012273:Ribulose-Bisphosphate Carboxylase / Q000235:genetics*; D016415:Sequence Alignment
chemical_list: D012273:Ribulose-Bisphosphate Carboxylase