# Purification and characterization of an $\alpha -_D-Glucuronidase$ from a thermophilic fungus, Thermoascus aurantiacus

Khandke, Kiran M and Vithayathil, PJ and Murthy, SK (1989) Purification and characterization of an $\alpha -_D-Glucuronidase$ from a thermophilic fungus, Thermoascus aurantiacus. In: Archives of Biochemistry and Biophysics, 274 (2). pp. 511-517.

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## 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 °C. The t1/2 at 70 °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

Item Type: Journal Article Copyright of this article belongs to Elsevier Science Division of Biological Sciences > Biochemistry 14 Feb 2008 19 Sep 2010 04:42 http://eprints.iisc.ernet.in/id/eprint/12790