Nucleic Acids Research, 1983, Vol. 11, No. 16 5763-5774
© 1983
MOLECULAR BIOLOGY |
Sequence analysis of a cluster of twenty-one tRNA genes in Bacillus subtilis
Biomedical Research Laboratory, SRI International, 333 Ravenswood Avenue Menlo Park, CA 94025, USA
Received April 25, 1983. Accepted July 25, 1983.
The DNA sequence of a cluster of twenty-one tRNA genes distal to a rRNA gene set in B. subtilis was determined. None of the tRNA genes are repeated in the sequence. The only classes of tRNAs that are not represented are those for cysteine, glutamlne, tryptophan, and tyrosine. Three of the tRNA genes in this cluster do not have the 3'-CCA sequence encoded in the gene. There is no RNA polynerase terminator sequence in the region between the 5S gene and the first tRNA gene or within the tRNA gene cluster. A terminator sequence was found directly after the last tRNA gene. This rRNA and tRNA gene cluster probably represents one transcriptional unit. However, there may be an RNA polymerase promoter site within this sequence, which raises some interesting questions concerning the regulation of transcription for these tRNA genes.