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Crystallization and preliminary crystallographic analysis of the catechol 2,3-dioxygenase PheB from Bacillus
Keisuke Sugimoto1, Kazuki Matsufuzi, Hiroaki Ohnuma
1Department of Material Chemistry, Asahikawa National College of Technology, 2-2-1-6 Shunko-dai, Asahikawa, Hokkaido 071-8142, Japan.
Abstract:
Class II extradiol-cleaving catecholic dioxygenase, a key enzyme of aromatic compound degradation in bacteria, cleaves the aromatic ring of catechol by adding two O atoms. PheB is one of the class II extradiol-cleaving catecholic dioxygenases and shows a high substrate specificity for catechol derivatives, which have one aromatic ring. In order to reveal the mechanism of the substrate specificity of PheB, PheB has been crystallized by the hanging-drop vapour-diffusion method using PEG 4000 as a precipitant. The space group of the obtained crystal was P2(1)2(1)2(1), with unit-cell parameters a = 65.5, b = 119.2, c = 158.7 A. The crystal diffracted to 2.3 A resolution.
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