title: A secY homologue is found in the plastid genome of Cryptomonas phi.
abstract: An open reading frame with significant similarity to the secY gene of Escherichia coli has been found within a ribosomal protein operon on the plastid genome of the chlorophyll c-containing alga Cryptomonas phi. The gene encodes a protein of 420 amino acids (molecular weight 46,906 daltons) and contains ten potential membrane-spanning domains, as in the E. coli homologue. This report of a secY homologue in a plastid genome provides preliminary evidence that a prokaryotic-like protein export system may be operating in plastids.
authors.affiliation: Institute for Marine Biosciences, National Research Council, Halifax, Nova Scotia, Canada.
authors.forename: S E
authors.initials: SE
authors.lastname: Douglas
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification; D001483:Base Sequence; D002736:Chloroplasts / Q000737:chemistry*; D029968:Escherichia coli Proteins; D056890:Eukaryota / Q000737:chemistry / Q000235:genetics*; D005798:Genes, Bacterial; D016678:Genome; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic; D000069816:SEC Translocation Channels; D016415:Sequence Alignment; D012689:Sequence Homology, Nucleic Acid
chemical_list: D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D000069816:SEC Translocation Channels; C057841:SecY protein, E coli