Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

The clpP multigenic family in Streptomyces lividans : conditional expression of the clpP3 clpP4 operon is controlled by PopR, a novel transcriptional activator

The clpP multigenic family in Streptomyces lividans : conditional expression of the clpP3 clpP4... The clpP genes are widespread among living organisms and encode the proteolytic subunit of the Clp ATP‐dependent protease. These genes are present in a single copy in most eubacteria. However, five clpP genes were identified in Streptomyces coelicolor. The clpP1 clpP2 operon was studied: mutations affected the growth cycle in various Streptomyces. Here, we report studies of the expression of the clpP3 clpP4 operon in Streptomyces lividans. The clpP3 operon was induced in a clpP1 mutant strain, and the regulation of expression was investigated in detail. The product of the putative regulator gene, downstream from clpP4, was purified. Gel migration shift assays and DNase I footprinting showed that this protein binds to the clpP3 promoter and recognizes a tandem 6 bp palindromic repeat (TCTGCC‐3N‐GGCAGA). In vivo, this DNA‐binding protein, named PopR, acts as an activator of the clpP3 operon. Studies of popR expression indicate that the regulator is probably controlled at the post‐transcriptional level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Molecular Microbiology Wiley

The clpP multigenic family in Streptomyces lividans : conditional expression of the clpP3 clpP4 operon is controlled by PopR, a novel transcriptional activator

Loading next page...
 
/lp/wiley/the-clpp-multigenic-family-in-streptomyces-lividans-conditional-Ff4wHbUX8q

References (60)

Publisher
Wiley
Copyright
Blackwell Science Ltd
ISSN
0950-382X
eISSN
1365-2958
DOI
10.1046/j.1365-2958.2000.02155.x
Publisher site
See Article on Publisher Site

Abstract

The clpP genes are widespread among living organisms and encode the proteolytic subunit of the Clp ATP‐dependent protease. These genes are present in a single copy in most eubacteria. However, five clpP genes were identified in Streptomyces coelicolor. The clpP1 clpP2 operon was studied: mutations affected the growth cycle in various Streptomyces. Here, we report studies of the expression of the clpP3 clpP4 operon in Streptomyces lividans. The clpP3 operon was induced in a clpP1 mutant strain, and the regulation of expression was investigated in detail. The product of the putative regulator gene, downstream from clpP4, was purified. Gel migration shift assays and DNase I footprinting showed that this protein binds to the clpP3 promoter and recognizes a tandem 6 bp palindromic repeat (TCTGCC‐3N‐GGCAGA). In vivo, this DNA‐binding protein, named PopR, acts as an activator of the clpP3 operon. Studies of popR expression indicate that the regulator is probably controlled at the post‐transcriptional level.

Journal

Molecular MicrobiologyWiley

Published: Nov 1, 2000

There are no references for this article.