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Journal of Bacteriology, December 1999, p. 7621-7625, Vol. 181, No. 24
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

RNase E Enzymes from Rhodobacter capsulatus and Escherichia coli Differ in Context- and Sequence-Dependent In Vivo Cleavage within the Polycistronic puf mRNA

Claudia Heck, Elena Evguenieva-Hackenberg, Angelika Balzer, and Gabriele Klug*

Institut für Mikrobiologie und Molekularbiologie, D-35392 Gießen, Germany

Received 30 March 1999/Accepted 30 September 1999

The 5' pufQ mRNA segment and the pufLMX mRNA segment of Rhodobacter capsulatus exhibit different stabilities. Degradation of both mRNA segments is initiated by RNase E-mediated endonucleolytic cleavage. While Rhodobacter RNase E does not discriminate between the different sequences present around the cleavage sites within pufQ and pufL, Escherichia coli RNase E shows preference for the sequence harboring more A and U residues.

* Corresponding author. Mailing address: Institut für Mikrobiologie und Molekularbiologie, Frankfurter Str. 107, D-35392 Gießen, Germany. Phone: 49 641 99 35542. Fax: 49 641 99 35549. E-mail: Gabriele.Klug{at}mikro.bio.uni-giessen.de.

Journal of Bacteriology, December 1999, p. 7621-7625, Vol. 181, No. 24
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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