Proteolytic inactivation of an extracellular (1 → 3)-β-glucanase from the fungus Acremonium persicinum is associated with growth at neutral or alkaline medium pH Academic Article uri icon


  • The filamentous fungus Acremonium persicinum released high levels of proteolytic enzyme activity into the culture fluid during growth at pH 7 or above. Almost total inhibition of this crude activity by phenylmethylsulfonyl fluoride suggested that it was mainly due to the presence of a serine protease. This protease inactivated one of three extracellular (1-->3)-beta-glucanases produced by this fungus, although the activities of the remaining two (1-->3)-beta-glucanases did not appear to be affected. Growth of A. persicinum in acidic conditions resulted in the presence of much lower extracellular proteolytic activity and no apparent (1-->3)-beta-glucanase inactivation.

publication date

  • December 1, 1996