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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.


Journal article


FEMS Microbiol Lett

Publication Date





133 - 137


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