Changes in N-acetyl galactosaminoglycan deacetylase levels during growth ofNeurospora crassa: effect ofL-sorbose on enzyme production

Abstract

The levels of N-acetyl galactosaminoglycan deacetylase in Neurospora crassa were determined at different stages of growth. The enzyme first appeared 24 h after inoculation. Deacetylase levels were increased by the presence of L-sorbose, a sugar which induces colonial growth of N. crassa. The effect of L-sorbose on deacetylase production, was also observed in the presence of other carbon sources. Ammonium tartrate also increased deacetylase activity, but without provoking morphological changes. Apparently, the effect of these two substances on deacetylase production by N. crassa was associated to the presence of galactosamine polymers in the culture medium, rather than to the morphological change itself.