3.4.21.B50 malfunction compared with the wild-type strain NCD-2, the degQ-null mutant has decreased extracellular protease and cellulase activities as well as antifungal ability against the growth of Babillus cinerea in vitro. The lipopeptides from the degQ-null mutant also have significantly decreased antifungal activity against Botrytis cinerea in vitro and in vivo. degQ-null mutant have a flatter colony phenotype and significantly decreased biofilm formation ability relative to the wild-type strain. The degQ-null mutant shows decreased fengycin production -, 754649 3.4.21.B50 malfunction in domesticated Bacillus subtilis a promoter mutation decreases the rate of degQ transcription. The resulting low level of DegQ decreases DegU phosphorylation, relieving repression at the srfA promoter. As a result more ComS is synthesized and the degradation of ComK by MecA/ClpCP is decreased 753678 3.4.21.B50 malfunction the absence of DegQ does not affect outer membrane protein biogenesis in Neisseria meningitides -, 717730 3.4.21.B50 physiological function DegQ does not act as a functional homolog of DegP and plays no role in outer membrane protein biogenesis in Neisseria meningitides -, 717730 3.4.21.B50 physiological function DegQ may be an important regulatorof fengycin production and biofilm formation in Bacillus subtilis NCD-2 -, 754649 3.4.21.B50 physiological function E-cadherin cleavage is an important step in bacterial pathogenesis -, 753173 3.4.21.B50 physiological function the regulation of the K-state in undomesticated strains of Bacillus subtilis requires the proper ratio of phosphorylated undunphosphorylated DegU, in accordance with the view that this protein acts as a rheostat for development 753678