Cell-surface Labeling via Bioorthogonal Host-Guest Chemistry.

Cell-surface Labeling via Bioorthogonal Host-Guest Chemistry.
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DOI:
10.1021/acschembio.1c00494
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发表时间:
2021-11-19
影响因子:
4
通讯作者:
Sletten, Ellen M.
Sletten, Ellen M.
中科院分区:
生物学2区
文献类型:
--
作者:
Kataki-Anastasakou, Anna;Hernandez, Selena;Sletten, Ellen M.

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The widespread adoption of the bioorthogonal chemical reporter strategy revolutionized chemical biology. However, its translation to living mammals has been challenging, due to the size/stability properties of the chemical reporter group and/or the reaction kinetics of the labeling step. While developing new bioorthogonal reactions has been the traditional approach to optimizing the bioorthogonal chemical reporter strategy, here we present a different avenue, leveraging intermolecular interactions, to create bioorthogonal host–guest pairs. This approach, deemed “bioorthogonal complexation, does not rely on activated functional groups or second-order rate constants. We utilize the cucurbit[7]uril (CB[7]) scaffold to showcase bioorthogonal complexation and determine that medium-affinity (Ka ≈ 108–109 M–1) guests efficiently label cell surfaces and outperform the strain-promoted azidealkyne cycloaddition. Finally, we implement bioorthogonal complexation in the chemical reporter strategy through the metabolic incorporation of ortho-carborane into cell-surface glycans and detection with a CB[7]-fluorescein conjugate.
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