title: A tobacco chloroplast DNA sequence possibly coding for a polypeptide similar to E. coli RNA polymerase beta-subunit.
abstract: DNA sequencing has revealed a long open reading frame (ORF) in the large single-copy region of tobacco chloroplast DNA. This ORF consists of 1070 codons and its deduced amino acid sequence shows about 39% homology to that of the beta-subunit of E. coli RNA polymerase. This finding raises a possibility that some of the chloroplast RNA polymerase subunits are coded for by the chloroplast genome.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002736:Chloroplasts / Q000378:metabolism*; D003001:Cloning, Molecular; D004247:DNA / Q000302:isolation & purification; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D046911:Macromolecular Substances; D010455:Peptides / Q000235:genetics*; D010940:Plant Proteins / Q000235:genetics*; D010944:Plants / Q000378:metabolism; D010947:Plants, Toxic; D012689:Sequence Homology, Nucleic Acid; D014026:Nicotiana / Q000378:metabolism
chemical_list: D046911:Macromolecular Substances; D010455:Peptides; D010940:Plant Proteins; D004247:DNA; D012321:DNA-Directed RNA Polymerases