Photo-SNAP-tag, a Light-Regulated Chemical Labeling System.

Photo-SNAP-tag, a Light-Regulated Chemical Labeling System.
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DOI:
10.1021/acschembio.0c00412
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发表时间:
2020-08-21
影响因子:
4
通讯作者:
Tucker CL
Tucker CL
中科院分区:
生物学2区
文献类型:
--
作者:
Cleveland JD;Tucker CL

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允许标记和跟踪蛋白质的方法有助于了解其功能。标记蛋白质的传统方法包括与荧光蛋白融合或自标记化学标签系统,例如 SNAP-tag 或 Halo-tag。后一种方法允许明亮的荧光团或其他化学部分通过小的融合标签附着到感兴趣的蛋白质上。在这项工作中,我们试图通过光调节自标记化学标记系统的活性来提高其多功能性。我们使用光诱导二聚体重建分裂的 SNAP 标签(修饰的人 O6-烷基鸟嘌呤-DNA-烷基转移酶,hAGT)蛋白,从而实现化学标记的严格光依赖性控制。此外,我们生成了一个小的分裂 SNAP 标签片段,它可以与其补体片段有效地自组装,从而利用小标签实现高标记效率。我们预计这些工具将扩展 SNAP 标签化学系统在蛋白质标记应用中的多功能性和实用性。
Methods that allow labeling and tracking of proteins have been instrumental for understanding their function. Traditional methods for labeling proteins include fusion to fluorescent proteins or self-labeling chemical tagging systems such as SNAP-tag or Halo-tag. These latter approaches allow bright fluorophores or other chemical moieties to be attached to a protein of interest though a small fusion tag. In this work, we sought to improve the versatility of self-labeling chemical-tagging systems by regulating their activity with light. We used light-inducible dimerizers to reconstitute a split SNAP-tag (modified human O6-alkylguanine-DNA-alkyltransferase, hAGT) protein, allowing tight light-dependent control of chemical labeling. In addition, we generated a small split SNAP-tag fragment that can efficiently self-assemble with its complement fragment, allowing high labeling efficacy with a small tag. We envision these tools will extend the versatility and utility of the SNAP-tag chemical system for protein labeling applications.
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