Transcriptional analysis of the recA gene in Streptomyces rimosus: identification of the new type of promoter

FEMS Microbiol Lett. 2002 Mar 19;209(1):133-7. doi: 10.1111/j.1574-6968.2002.tb11121.x.

Abstract

Using primer-extension analysis we identified two transcription start sites for the recA gene in Streptomyces rimosus. A longer, weak transcript is initiated from the distal SEP promoter that contains a Cheo box like sequence: GAAC-N4-ATTC. However, the major start site of transcription is a G at position -36 and this shorter transcript significantly increases in response to DNA damage by UV-light. The -35 box (TTGTCA) and -10 box (TAGCGT) of the strong recA promoter are only 11 bp apart and this proximal promoter is almost identical to the strong, DNA damage-inducible promoter of Mycobacterium tuberculosis recA gene. We inspected the Streptomyces coelicolor database and found this type of promoter in the upstream regions of many (potentially) UV-inducible genes as well as some other genes/ORFs. Moreover, the DNA sequence between the predicted -35 and -10 boxes is also partially conserved. The consensus sequence for this new type of promoter in Streptomyces is: TTGTCAGTGGC-N6-TAGggT.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / biosynthesis
  • Bacterial Proteins / genetics*
  • Base Sequence
  • Consensus Sequence
  • DNA Damage
  • DNA Repair
  • DNA, Bacterial / genetics
  • DNA, Bacterial / radiation effects
  • Gene Expression Regulation, Bacterial* / radiation effects
  • Genes, Bacterial* / radiation effects
  • Open Reading Frames
  • Promoter Regions, Genetic* / genetics
  • Rec A Recombinases / biosynthesis
  • Rec A Recombinases / genetics*
  • Sequence Alignment
  • Sequence Homology, Nucleic Acid
  • Species Specificity
  • Streptomyces / genetics*
  • Streptomyces / radiation effects
  • Transcription Initiation Site
  • Transcription, Genetic* / radiation effects
  • Ultraviolet Rays

Substances

  • Bacterial Proteins
  • DNA, Bacterial
  • Rec A Recombinases