Non-canonical Split Intein Based Controllable C-cleavage

Non-canonical Split Intein Based Controllable C-cleavage
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基于非规范内含肽的可控 C 切割

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发表时间:
2011
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Chinese Journal of Biochemistry and Molecular Biology
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其他
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基于内含肽的蛋白质切割已用于蛋白质纯化、肽连接和环化。然而,现有的使用常规连续内含肽的方法常常导致自发切割并导致所需蛋白质产物的产量降低。在这里,我们报告了一种使用三种工程化 S1 分裂内含肽、Ter ThyX、Ssp GryB 和 Rma DnaB 的可控切割策略。在这种可控的C-裂解设计中,S1-I C 序列的C-末端与硫氧还蛋白融合形成前体蛋白,并且来自Ssp DnaB S1分裂内含肽的合成S1-I N肽与DTT一起使用以触发I C C-末端的裂解,其中该肽可以触发所有三个中的C-裂解。 内含子。这种方法为使用内含肽 C 切割而无需自发切割的蛋白质纯化提供了更多选择,并且可能对内含肽结构-功能关系的研究有用。
Intein-based protein cleavage has been used in protein purification , peptide ligation and cyclization. However , the existing methods employing conventional contiguous inteins often result in spontaneous cleavage and cause reduced yields of the desired protein products. Here we report a controllable cleavage strategy using three engineered S1 split-inteins , Ter ThyX , Ssp GryB and Rma DnaB. In this controllable C-cleavage design , the C-terminus of a S1-I C sequence was fused with thioredoxin to form a precursor protein , and a synthetic S1-I N peptide from the Ssp DnaB S1 split-intein was used together with DTT to trigger the cleavage at the C-terminus of the I C , where this peptide can trigger C-cleavage in all three inteins. This approach provided more options for protein purification using intein C-cleavage without spontaneous cleavage and might be useful to the studies of the intein structure- function relations.
DOI: 10.1073/pnas.94.15.7851
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