Stimulates biofilm formation via transcriptional activation of extracellular matrix genes. Acts by repressing SinR activity, independently of the SinI, SlrA and SlrR pathways. Could also be involved in the regulation of other genes during biofilm and spore formation. During sporulation, accumulates in the forespore compartment but not in the mother cell. Expressed during both vegetative growth phase and sporulation. Mutants show poor germination in the presence of L-alanine and reduced biofilm formation.