Abstract
Genes rplJ, coding for ribosomal protein L10 of Salmonella typhimurium and Klebsiella pneumoniae, have been cloned on pUC plasmid. The resultant multicopy recombinant plasmids were detrimental for the growth of normal JM101 E. coli host cells and harmless for the mutant JF3029 host. This negative effect is the evidence for the ability of heterologous L10 proteins to regulate expression of rplJL genes in E. coli. Nucleotide sequence was determined completely for S. typhimurium rplJL ‘DNA portion and partially for rplJL’ genes of K. pneumoniae. According to the nucleotide sequence data obtained three amino acid substitutions differ L10 proteins of S. typhimurium and E. coli and the long range, providing for the coupled translations of L10 and L7/L12 cistrons in E. coli mRNA is also valid for S. typhimurium and K. pneumoniae.
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