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Journal of Bacteriology, July 1999, p. 4114-4117, Vol. 181, No. 13
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

ScoC Regulates Peptide Transport and Sporulation Initiation in Bacillus subtilisdagger

Akiko Koide, Marta Perego, and James A. Hoch*

Division of Cellular Biology, Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037

Received 8 February 1999/Accepted 20 April 1999

Oligopeptides are transported into Bacillus subtilis by two ABC transport systems, App and Opp. Transcription of the operon encoding the Opp system was found to occur during exponential growth, whereas the app operon was induced at the onset of stationary phase. Transcription of both operons was completely curtailed by overproduction of the ScoC regulator from a multicopy plasmid and was enhanced in strains with the scoC locus deleted. ScoC, a member of the MarR family of transcription regulators, is known from previous studies to be a negative regulator of sporulation and of protease production that acts by binding directly to the promoters of the genes it regulates. Since peptide transport is essential for inactivation of the negative regulation of sporulation by Rap phosphatases, the control of ScoC transcription repression activity plays a crucial role in the initiation of sporulation.

* Corresponding author. Mailing address: Department of Molecular and Experimental Medicine, NX-1, The Scripps Research Institute, 10550 North Torrey Pines Rd., La Jolla, CA 92037. Phone: (858) 784-7905. Fax: (858) 784-7966. E-mail: hoch{at}scripps.edu.

dagger Publication 12189-MEM from the Department of Molecular and Experimental Medicine at The Scripps Research Institute.

Journal of Bacteriology, July 1999, p. 4114-4117, Vol. 181, No. 13
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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