Characterization of the 5' subtilisin (aprE) regulatory region from Bacillus subtilis

Janet Jan, Fernando Valle, Francisco Bolivar, Enrique Merino

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19 Scopus citations

Abstract

The aprE gene of Bacillus subtilis encodes the major serine alkaline protease known as subtilisin. It is expressed during the transition state and transcribed by the σ(A) form of the RNA polymerase (RNAP). In this work, we characterized the regulatory region of the aprE gene (rraprE) from B. subtilis. By computer analysis and site-directed mutagenesis, we localized the aprE promoter sequence 7 bp upstream from its transcription initiation site (TIS). We also characterized the static curvature properties of the rraprE DNA and found two different areas of DNA bending, within the first 400 bp upstream of its TIS. We postulate that these particular curved DNA regions could play a role in the interaction with some regulatory proteins and discuss possible implications related to aprE transcription regulation. (C) Federation of European Microbiological Societies.

Original languageEnglish
Pages (from-to)9-14
Number of pages6
JournalFEMS Microbiology Letters
Volume183
Issue number1
DOIs
StatePublished - 1 Feb 2000
Externally publishedYes

Keywords

  • Bacillus subtilis
  • Curved DNA
  • Promoter sequence
  • Site-directed mutagenesis
  • aprE

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