Discovery of catalytic phages by biocatalytic self-assembly.

Discovery of catalytic phages by biocatalytic self-assembly.
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通过生物催化自组装发现催化噬菌体。

DOI:
10.1021/ja509393p
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发表时间:
2014-11-12
影响因子:
15
通讯作者:
Matsui H
Matsui H
中科院分区:
化学1区
文献类型:
--
作者:
Maeda Y;Javid N;Duncan K;Birchall L;Gibson KF;Cannon D;Kanetsuki Y;Knapp C;Tuttle T;Ulijn RV;Matsui H

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为要求苛刻的水溶液反应发现新的催化剂是具有挑战性的。在这里,我们描述了通过利用所筛选的催化反应产物的局部组装来选择催化噬菌体的方法。一个包含109个独特的十二肽序列的噬菌体展示文库与非组装前体孵育。能够催化形成自组装反应产物(通过酰胺缩合)的噬菌体获得反应产物的聚集体,从而能够通过离心法进行分离。如此选择的噬菌体可以通过感染大肠杆菌进行扩增。这些噬菌体被证明能够催化酰胺缩合和水解。动力学分析表明底物结合的作用很小。这种方法使生物催化噬菌体的发现和大规模生产成为可能。
Discovery of new catalysts for demanding aqueous reactions is challenging. Here, we describe methodology for selection of catalytic phages by taking advantage of localized assembly of the product of the catalytic reaction that is screened for. A phage display library covering 109 unique dodecapeptide sequences is incubated with nonassembling precursors. Phages which are able to catalyze formation of the self-assembling reaction product (via amide condensation) acquire an aggregate of reaction product, enabling separation by centrifugation. The thus selected phages can be amplified by infection of Escherichia coli. These phages are shown to catalyze amide condensation and hydrolysis. Kinetic analysis shows a minor role for substrate binding. The approach enables discovery and mass-production of biocatalytic phages.
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发表时间: 2014-04-14
影响因子: 16.6
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