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J Bacteriol, April 1998, p. 2248-2252, Vol. 180, No. 8
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Specific Binding of Escherichia coli Ribosomal Protein S1 to boxA Transcriptional Antiterminator RNA

Jeremy Mogridge and Jack Greenblatt*

Banting and Best Department of Medical Research and Department of Molecular and Medical Genetics, University of Toronto, Toronto, Canada M5G 1L6

Received 20 October 1997/Accepted 16 February 1998

We show that ribosomal protein S1 specifically binds the boxA transcriptional antiterminator RNAs of bacteriophage lambda  and the Escherichia coli ribosomal RNA operons. Although S1 competes with the NusB-S10 antitermination complex for binding to boxA, it does not affect antitermination by the lambda  N protein in vitro, and its role, if any, in rRNA synthesis is still unknown.

* Corresponding author. Mailing address: Banting and Best Department of Medical Research and Department of Molecular and Medical Genetics, University of Toronto, 112 College St., Toronto, Canada M5G 1L6. Phone: (416) 978-4141. Fax: (416) 978-8528. E-mail: jack.greenblatt{at}utoronto.ca.




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