Zhan Q, Shi C, Jiang Y, Gao X, Lin Y. Efficient splicing of the CPE intein derived from directed evolution of the
Cryptococcus neoformans PRP8 intein.
Acta Biochim Biophys Sin (Shanghai) 2023;
55:1310-1318. [PMID:
37489009 PMCID:
PMC10448054 DOI:
10.3724/abbs.2023135]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/19/2023] [Indexed: 07/26/2023] Open
Abstract
Intein-mediated protein splicing has been widely used in protein engineering; however, the splicing efficiency and extein specificity usually limit its further application. Thus, there is a demand for more general inteins that can overcome these limitations. Here, we study the trans-splicing of CPE intein obtained from the directed evolution of Cne PRP8, which shows that its splicing rate is ~29- fold higher than that of the wild-type. When the +1 residue of C-extein is changed to cysteine, CPE also shows high splicing activity. Faster association and higher affinity may contribute to the high splicing rate compared with wild-type intein. These findings have important implications for the future engineering of inteins and provide clues for fundamental studies of protein structure and folding.
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