Purification and characterization of an alpha-D-glucuronidase from a thermophilic fungus, Thermoascus aurantiacus - PubMed (original) (raw)
Purification and characterization of an alpha-D-glucuronidase from a thermophilic fungus, Thermoascus aurantiacus
K M Khandke et al. Arch Biochem Biophys. 1989.
Abstract
An alpha-D-glucuronidase was purified from the culture filtrates of Thermoascus aurantiacus. A simple colorimetric method for its assay is reported. The enzyme is a single polypeptide chain with a molecular weight of 118,000. It acts optimally at pH 4.5. It shows maximum activity at 65 degrees C. The t 1/2 at 70 degrees C was 40 min. It specifically cleaved the alpha-(1----2) linkage between 4-O-methyl-alpha-D-glucuronic acid and the xylose residue in xylan and several glucurono-xylooligosaccharides.
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