Regulates the biosynthesis of the extracellular matrix and the biofilm formation (PubMed:19363116, PubMed:23646920). Activates the transcription of the matrix biosynthesis operons eps and tapA-sipW-tasA. Also activates expression of the opuA operon, involved in osmoprotection. Acts by binding specifically to the promoter region of the target genes (PubMed:23646920). Acts in parallel to the pathway that governs SinR derepression (PubMed:19363116, PubMed:23646920). Required for endosporulation (PubMed:23396918). Expressed in the forespore during sporulation. Mutation impairs pellicle formation, complex colony architecture and motility inhibition in a sinR mutant background (PubMed:19363116). Mutant is defective in biofilm formation and also shows a delay in spore formation during biofilm formation (PubMed:23396918). Belongs to the RemA family.