Cold Shock Induction of the cspL Gene in Lactobacillus plantarum Involves Transcriptional Regulation

Fragments of the cspL promoter region were fused to the gusA reporter and reintroduced into Lactobacillus plantarum cells, either on multicopy plasmids or through single-copy chromosomal integration. β-Glucuronidase activity and primer extension data demonstrate that the cspL promoter is induced in response to cold shock and that multicopy constructs quench the induction of the resident cspL gene.