Susceptibility of UDP-Glucose:(1,3)-beta-Glucan Synthase to Inactivation by Phospholipases and Trypsin
- PMID: 16666707
- PMCID: PMC1056019
- DOI: 10.1104/pp.89.4.1341
Susceptibility of UDP-Glucose:(1,3)-beta-Glucan Synthase to Inactivation by Phospholipases and Trypsin
Abstract
UDP-glucose:(1,3)-beta-glucan synthase from Beta vulgaris L. was rapidly inactivated by treatment with phospholipases C, D, and A(2). Enzyme activity could not be restored to the phospholipase-treated enzyme by the addition of phosphatidylethanolamine or other phospholipids. Membrane-bound and solubilized glucan synthase were also trypsin-labile with inactivation rates equal in the presence or absence of divalent cations or chelators. Gradual activity declines were observed in membranes incubated with divalent cations, but not with chelators.
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