title: A Spiroplasma tRNA gene cluster.
abstract: Using molecular cloning techniques, a clone containing a 7-kb insert of Spiroplasma species BC3 DNA that hybridized strongly to total labeled Spiroplasma tRNA was identified. Sequence analysis of a portion of this recombinant plasmid identified a cluster of tRNA genes. The gene order was as follows: tRNACys-tRNAArg-tRNAPro-tRNAAla-tRNAMet-tRNAIle and a portion of tRNASer All the genes encode the 3'-terminal CCA and have very high A + T and relatively long intergenic regions. An RNA polymerase promoter site was found upstream of the tRNACys gene. The tRNA gene cluster found in Spiroplasma can be compared with a similar Bacillus subtilis gene cluster, which raises interesting questions concerning gene organization and transcription.
mesh_terms: D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial / Q000235:genetics; D005798:Genes, Bacterial; D008040:Genetic Linkage; D006860:Hydrogen Bonding; D012343:RNA, Transfer / Q000235:genetics*; D013149:Spiroplasma / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D012343:RNA, Transfer; D004262:DNA Restriction Enzymes