Role of glutamic acid 177 of the ricin toxin A chain in enzymatic inactivation of ribosomes

Role of glutamic acid 177 of the ricin toxin A chain in enzymatic inactivation of ribosomes
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蓖麻毒素 A 链谷氨酸 177 在核糖体酶促失活中的作用

DOI:
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发表时间:
1989
影响因子:
5.3
通讯作者:
A. Frankel
A. Frankel
中科院分区:
生物学2区
文献类型:
--
作者:
D. Schlossman;D. Withers;P. Welsh;Andrew L. Alexander;J. Robertus;A. Frankel

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蓖麻毒素A链的基因通过编码短胶原接头的DNA序列融合到β-半乳糖苷酶标记顺反子上,并在大肠杆菌中表达三重融合蛋白。使用位点特异性诱变将谷氨酸残基177改变为天冬氨酸或丙氨酸。当突变体蛋白的表达,纯化,并定量测试酶活性,在位置177的羧酸功能被发现是不是绝对必要的蓖麻毒素A链催化。
The gene for the A chain of ricin toxin was fused to a beta-galactosidase marker cistron via a DNA sequence encoding a short collagen linker, and the tripartite fusion protein was expressed in Escherichia coli. Site-specific mutagenesis was used to change glutamic acid residue 177 to aspartic acid or alanine. When the mutant proteins were expressed, purified, and tested quantitatively for enzymatic activity, the carboxylate function at position 177 was found not to be absolutely essential for ricin toxin A-chain catalysis.
通过基因融合和位点特异性蛋白水解快速纯化克隆基因产物。
DOI: 10.1073/pnas.81.15.4692
发表时间: 1984
影响因子: 11.1
作者:
Germino,J;Bastia,D
通讯作者: Bastia,D
DOI: 10.1073/pnas.80.22.6848
发表时间: 1983-11
影响因子: 11.1
作者:
J. Germino;J. Gray;H. Charbonneau;T. Vanaman;D. Bastia
通讯作者: J. Germino;J. Gray;H. Charbonneau;T. Vanaman;D. Bastia