Purification and Characterization of Trehalose Phosphorylase from Catellatospora ferruginea

Abstract

  Trehalose phosphorylase was purified from the cell extracts of Catellatospora ferruginea. The enzyme had an apparent molecular weight of 400,000 by gel filtration and 98,000 by SDS-PAGE, suggesting that the enzyme was a tetramer. The enzyme was specific for trehalose in phosphorolysis and specific for β-D-glucose 1-phosphate in synthesis. In addition to D-glucose, D-xylose and D-fucose were also possible sugar acceptors during synthesis. Phosphate ions were a key to the activity and stability of the enzyme, controlling the equilibrium of the reversible reaction and the heat stability of the enzyme. The enzyme was strongly inhibited by p-chloromercuribenzoate and pyridoxal phosphate. The enzyme was inactivated by heat or by storage frozen with ammonium chloride and lithium chloride.