title: Cloning and nucleotide sequence of the leucyl-tRNA synthetase gene of Bacillus subtilis.
abstract: The leucyl-tRNA synthetase gene (leuS) of Bacillus subtilis was cloned and sequenced. A mutation in the gene, leuS1, increases the transcription and expression of the ilv-leu operion, permitting monitoring of leuS alleles. The leuS1 mutation was mapped to 270 degrees on the chromosome. Sequence analysis showed that the mutation is a single-base substitution, possibly in a monocistronic operon. The leader mRNA predicted by the sequence would contain a number of possible secondary structures and a T box, a sequence observed upstream of leader mRNA terminators of Bacillus tRNA synthetases and the B. subtilis ilv-leu operon. The DNA of the B. subtilis leuS open reading frame is 48% identical to the leuS gene of Escherichia coli and is predicted to encode a polypeptide with 46% identity to the leucyl-tRNA synthetase of E. coli.
authors.affiliation: Section of Genetics and Development, Cornell University, Ithaca, New York 14853.
authors.forename: P B
authors.initials: PB
authors.lastname: Vander Horn
authors.forename: S A
authors.initials: SA
authors.lastname: Zahler
mesh_terms: D000595:Amino Acid Sequence; D001412:Bacillus subtilis / Q000201:enzymology* / Q000235:genetics; D001435:Bacteriophages / Q000235:genetics; D001483:Base Sequence; D003001:Cloning, Molecular; D004251:DNA Transposable Elements / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D007935:Leucine-tRNA Ligase / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D010957:Plasmids / Q000235:genetics
chemical_list: D004251:DNA Transposable Elements; D007935:Leucine-tRNA Ligase