PenA, a penicillin-binding protein-type thioesterase specialized for small peptide cyclization.

PenA, a penicillin-binding protein-type thioesterase specialized for small peptide cyclization.
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DOI:
10.1093/jimb/kuab023
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发表时间:
2021-06-04
影响因子:
3.4
通讯作者:
--
中科院分区:
工程技术3区
文献类型:
--
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青霉素结合蛋白型硫酯酶(pbp型TEs)是最近发现的一组肽环化酶,可催化非核糖体肽的头到尾大内酰胺化。PenA是该组的新成员,参与环五肽的生物合成。在本研究中,我们在体外证明了PenA的酶活性,并通过一系列合成底物分析了其底物范围。PenA与代表pbp型TE的SurE的反应谱比较表明,PenA更专一于小肽环化。计算模型为底物链长度特异性的改变提供了可能的结构原理。
Penicillin-binding protein-type thioesterases (PBP-type TEs) are a recently identified group of peptide cyclases that catalyze head-to-tail macrolactamization of nonribosomal peptides. PenA, a new member of this group, is involved in the biosyntheses of cyclic pentapeptides. In this study, we demonstrated the enzymatic activity of PenA in vitro, and analyzed its substrate scope with a series of synthetic substrates. A comparison of the reaction profiles between PenA and SurE, a representative PBP-type TE, showed that PenA is more specialized for small peptide cyclization. A computational model provided a possible structural rationale for the altered specificity for substrate chain lengths.
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