ChemistryOpen p. 448 - 452 (2015)
Update date:2022-08-02
Topics:
Tsuda, Yusuke
Shigenaga, Akira
Tsuji, Kohei
Denda, Masaya
Sato, Kohei
Kitakaze, Keisuke
Nakamura, Takahiro
Inokuma, Tsubasa
Itoh, Kohji
Otaka, Akira
Peptide thioesters are very useful in protein chemistry, and chemistry- and biochemistry-based protocols are used for the preparation of thioesters. Among such protocols, only a few biochemistry-based approaches have been use for naturally occurring peptide sequences. The development of chemistry-based protocols applicable to natural sequences remains a challenge, and the development of such methods would be a major contribution to protein science. Here, we describe the preparation of peptide thioesters using innovative methodology that features nickel(II)-mediated alcoholysis of a naturally occurring peptide sequence, followed by O-N and N-S acyl transfers. This protocol involves sequential quadruple acyl transfer, termed SQAT. Notably, the SQAT system consists of sequential chemical reactions that allow naturally occurring peptide sequences to be converted to thioesters without requiring an artificial chemical unit. SQATs: Peptide thioesters are an important compound class in peptide chemistry, but chemistry-based protocols to synthesize natural-peptide-based thioesters are challenging. Here, a sequential quadruple acyl transfer (SQAT) protocol is described for the preparation of thioesters. Importantly, the SQAT system can be applied to naturally occurring peptides, converting them to their corresponding thioesters without the need for an artificial chemical unit.
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