title: Evolutionary analysis of the plastid-encoded gene for the alpha subunit of the DNA-dependent RNA polymerase of Pyrenomonas salina (Cryptophyceae).
abstract: The nucleotide sequence of the gene coding for the plastid-encoded alpha subunit of DNA-dependent RNA polymerase from the cryptomonad alga Pyrenomonas salina was determined. The deduced amino-acid sequence, corresponding to a 35.2 kDa polypeptide, was compared to homologues from other organisms. Evolutionary relationships were analyzed in detail by the parsimony method together with bootstrap analysis. The deduced phylogenetic tree shows that the cryptomonad gene is the most ancient type of known plastid-encoded RNA polymerase.
authors: Institut für Biologie II, Lehrstuhl für Zellbiologie, Freiburg im Breisgau, Federal Republic of Germany.
authors: M
authors: M
authors: Maerz
authors: S
authors: S
authors: Rensing
authors: G L
authors: GL
authors: Igloi
authors: U G
authors: UG
authors: Maier
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D005075:Biological Evolution; D004247:DNA; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D056890:Eukaryota / Q000201:enzymology* / Q000235:genetics; D008969:Molecular Sequence Data; D015388:Organelles; D015183:Restriction Mapping; D017386:Sequence Homology, Amino Acid
chemical_list: D004247:DNA; D012321:DNA-Directed RNA Polymerases