Characterization of the Suillus grevillei Quinone Synthetase GreA Supports a Nonribosomal Code for Aromatic α‐Keto Acids

Characterization of the Suillus grevillei Quinone Synthetase GreA Supports a Nonribosomal Code for Aromatic α‐Keto Acids
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Suillus grevillei 醌合成酶 GreA 的表征支持芳香 α 酮酸的非核糖体代码

DOI:
10.1002/cbic.201200187
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发表时间:
2012
期刊:
影响因子:
3.2
通讯作者:
Hoffmeister D
Hoffmeister D
中科院分区:
生物学3区
文献类型:
--
作者:
Wackler B;Lackner G;Chooi YH;Hoffmeister D

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基因greA是从担子菌Suillus grevillei基因组中克隆的。它编码由腺苷酸化、巯基化和硫酯酶三个结构域组成的单模块天然产物生物合成蛋白,因此使人联想到非核糖体肽合成酶(NRPS)。GreA在体外进行生化表征。它被鉴定为阿托品合成酶,因此代表了有限数量的接受芳香族α-酮酸的生物化学表征的NRPS样酶之一。赋予特异性的氨基酸残基-统称为非核糖体密码-被预测为GreA腺苷酸化结构域的一级序列,并且是芳香族α-酮酸的前所未有的组合。对这个新密码的合理支持来自腺苷酸化结构域结构的计算机模拟。根据该模型,预测的残基排列在活性位点上,因此很可能有助于底物特异性。
The genegreAwas cloned from the genome of the basidiomyceteSuillus grevillei. It encodes a monomodular natural product biosynthesis protein composed of three domains for adenylation, thiolation, and thioesterase and, hence, is reminiscent of a nonribosomal peptide synthetase (NRPS). GreA was biochemically characterized in vitro. It was identified as atromentin synthetase and therefore represents one of only a limited number of biochemically characterized NRPS‐like enzymes which accept an aromaticα‐keto acid. Specificity‐conferring amino acid residues—collectively referred to as the nonribosomal code—were predicted for the primary sequence of the GreA adenylation domain and were an unprecedented combination for aromaticα‐keto acids. Plausible support for this new code came from in silico simulation of the adenylation domain structure. According to the model, the predicted residues line the active site and, therefore, very likely contribute to substrate specificity.
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发表时间: 2000-03-01
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