Investigation of Penicillin Binding Protein (PBP)-like Peptide Cyclase and Hydrolase in Surugamide Non-ribosomal Peptide Biosynthesis

Yongjun Zhou, Xiao Lin, Chunmin Xu, Yaoyao Shen, Shu-Ping Wang, Hongze Liao, Lei Li, Hai Deng* (Corresponding Author), Hou-Wen Lin* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Non-ribosomal peptides (NRPs) are biosynthesized on non-ribosomal peptides synthetase (NRPS) complexes, of which a C-terminal releasing domain commonly offloads the products. Interestingly, a dedicated releasing domain is absent in surugamides (SGM) NRPS, which directs the biosynthesis of cyclic octapeptides, SGM-A to -E, and the linear decapeptide, SGM-F. Here, we confirmed that surE is essential for the production of SGMs via genetic experiments. Biochemical characterization demonstrated that the recombinant enzyme, SurE, can generate the main products SGM-A and -F from the corresponding SNAC substrates, indicating that SurE is a standalone thioesterase-like enzyme. SurE also displays considerable substrate plasticity with expanded ring or different amino acid compositions to produce different cyclopeptides, highlighting the potential of chemoenzymatic applications. Site-directed mutagenesis allowed identification of the key residues of SurE. Finally, bioinformatics analysis suggested that SurE homologs are widely distributed in bacteria, suggesting a general mechanism of NRP release in Nature.

Original languageEnglish
Pages (from-to)737-744
Number of pages8
JournalCell chemical biology
Issue number5
Early online date21 Mar 2019
Publication statusPublished - 16 May 2019


  • penicillin binding protein
  • non-ribosomal peptide biosynthesis
  • cyclase and hydrolase
  • surugamides


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