Repetitive Thiazolidine Deprotection Using a Thioester-Compatible Aldehyde Scavenger for One-Pot Multiple Peptide Ligation.

Repetitive Thiazolidine Deprotection Using a Thioester-Compatible Aldehyde Scavenger for One-Pot Multiple Peptide Ligation.
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使用硫酯兼容的醛清除剂重复噻唑烷脱保护,进行一锅多肽连接。

DOI:
10.1002/anie.202206240
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发表时间:
2022
期刊:
Angewandte Chemie International Edition
影响因子:
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通讯作者:
H.
H.
中科院分区:
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文献类型:
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作者:
Nakatsu;K.; Okamoto;A.; Hayashi;G.; Murakami;H.

文献摘要

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一锅肽连接策略使化学家能够在短时间内以高产量获得合成蛋白质。在此,我们报告了一种使用 N 末端噻唑烷 (Thz) 肽和新设计的甲醛清除剂的新型一锅多段连接策略。在设计的2-氨基苯甲酰胺基醛清除剂中,2-氨基-5-甲氧基-N',N'-二甲基苯甲酰肼(AMDBH)在pH 4.0时可以显着地将Thz转化为未保护的半胱氨酸。此外,AMDBH 在 pH 7.5 时以相当低的速率降解 Thz,并且这种清除剂引起的硫酯降解可以忽略不计。因此,我们通过简单地用 AMDBH 重复改变 pH 值,开发了一种有效的一锅法肽连接策略。最后,我们通过 AMDBH 介导的一锅四段肽连接合成了单泛素化组蛋白 H2A.Z(209 个氨基酸),收率良好。
Strategies for one‐pot peptide ligation enable chemists to access synthetic proteins at a high yield in a short time. Herein, we report a novel one‐pot multi‐segments ligation strategy using N‐terminal thiazolidine (Thz) peptide and a newly designed formaldehyde scavenger. Among the designed 2‐aminobenzamide‐based aldehyde scavengers, 2‐amino‐5‐methoxy‐N′,N′‐dimethylbenzohydrazide (AMDBH) can remarkably convert Thz into unprotected cysteine at pH 4.0. Furthermore, AMDBH degrades Thz at a considerably low rate at pH 7.5, and thioester degradation caused by this scavenger is negligible. As a result, we have developed an efficient one‐pot peptide ligation strategy by simply repetitively changing the pH with AMDBH. Finally, we synthesize mono‐ubiquitinated histone H2A.Z (209 amino acids) via AMDBH‐mediated one‐pot four‐segment peptide ligation in good yield.