Expression, purification, crystallization, and preliminary X-ray analysis of the N-terminal domain of Escherichia coli adenylyl transferase

被引：7
|
作者：
Xu, YB [1 ]
Wen, DY
Clancy, P
Carr, PD
Ollis, DL
Vasudevan, SG
机构：
[1] James Cook Univ, Dept Biochem & Mol Biol, Townsville, Qld 4811, Australia
[2] Australian Natl Univ, Res Sch Chem, Canberra, ACT 2601, Australia
来源：
PROTEIN EXPRESSION AND PURIFICATION | 2004年 / 34卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
nucleotidyl transferase; nitrogen assimilation; bifunctional enzyme; domain structure; crystallization;
D O I：
10.1016/j.pep.2003.11.001
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
A soluble N-terminal domain of the Escherichia coli adenylyl transferase (ATase) is responsible for deadenylylation activity of the intact enzyme. Previous studies of the deadenylylation activity have involved a fragment, AT-N423 (residues 1 to 423), which was extended by 17 amino acids to give AT-N440. This new domain is truncated at the end of a predicted helix and prior to a Q-linker. The domain was found to be very soluble and stable so that it could be purified to homogeneity and crystallized. This construct has deadenylylation activity that is independent of the low nitrogen status indicator PII-UMP. The crystals belong to space group P3(1)21 or its enantiomorph P3(2)21 with a = b = 116.6 Angstrom and c = 67.6 Angstrom. (C) 2003 Elsevier Inc. All rights reserved.
引用
收藏
页码：142 / 146
页数：5
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