CRYSTALLIZATION AND PRELIMINARY-X-RAY DIFFRACTION STUDIES OF THE CATALYTIC CORE OF ACETYL XYLAN ESTERASE FROM TRICHODERMA-REESEI

Acetyl xylan esterase is involved in the biodegradation of hemicellulo se. It cleaves O-acetyl groups from xylan, which is the most abundant hemicellulose in nature. The catalytic core of acetyl xylan esterase f rom T. reesei has been crystallized and X-ray diffraction data at 2.3 Angstrom collected. The crystal belongs to the triclinic space group P 1 with unit-cell parameters a = 50.3, b = 62.1, c = 40.0 Angstrom, alp ha = 110.1, beta = 113.6 and gamma = 97.9 degrees. The asymmetric unit contains two molecules.