Site-Selective Cysteine-Cyclooctyne Conjugation.
Site-Selective Cysteine-Cyclooctyne Conjugation.
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DOI:
10.1002/anie.201800860
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发表时间:
2018-05-28
期刊:
影响因子:
--
通讯作者:
Pentelute BL
中科院分区:
文献类型:
--
作者:
Zhang C;Dai P;Vinogradov AA;Gates ZP;Pentelute BL
We report a site-selective cysteine-cyclooctyne conjugation reaction between a seven-residue peptide tag (DBCO-tag, Leu-Cys-Tyr-Pro-Trp-Val-Tyr), at the N or C-terminus of a peptide or protein, and various aza-dibenzocyclooctyne (DBCO) reagents. Compared to a cysteine peptide control, the DBCO-tag increases the rate of the thiol-yne reaction by 220-fold, enabling selective conjugation of DBCO-tag to DBCO-linked fluorescent probes, affinity tags, and cytotoxic drug molecules. Fusion of DBCO-tag with the protein of interest enables regioselective cysteine modification on proteins that contain multiple endogenous cysteines; these examples include green fluorescent protein and trastuzumab antibody. This study demonstrates short peptide tags could aid in accelerating bond forming reactions that are often slow to non-existent in water.
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