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J Bacteriol. Aug 1991; 173(15): 4595–4602.
PMCID: PMC208134

The rpsD gene, encoding ribosomal protein S4, is autogenously regulated in Bacillus subtilis.


Although the mechanisms for regulation of ribosomal protein gene expression have been established for gram-negative bacteria such as Escherichia coli, the regulation of these genes in gram-positive bacteria such as Bacillus subtilis has not yet been characterized. In this study, the B. subtilis rpsD gene, encoding ribosomal protein S4, was found to be subject to autogenous control. In E. coli, rpsD is located in the alpha operon, and S4 acts as the translational regulator for alpha operon expression, binding to a target site in the alpha operon mRNA. The target site for repression of B. subtilis rpsD by protein S4 was localized by deletion and oligonucleotide-directed mutagenesis to the leader region of the monocistronic rpsD gene. The B. subtilis rpsD leader exhibits little sequence homology to the E. coli alpha operon leader but may be able to form a pseudoknotlike structure similar to that found in E. coli.

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Selected References

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