Alternative Linkage Chemistries in the Chemoenzymatic Synthesis of Microviridin-Based Cyclic Peptides.
Patel, K.P., Chen, W.T., Delbecq, L., Bruner, S.D.(2024) Org Lett 26: 1138-1142
- PubMed: 38306609 
- DOI: https://doi.org/10.1021/acs.orglett.3c04045
- Primary Citation of Related Structures:  
8UO7, 8UTL - PubMed Abstract: 
Engineering biosynthetic pathways to ribosomally synthesized and post-translationally modified peptides (RiPPs) offers several advantages for both in vivo and in vitro applications. Here we probe the ability of peptide cyclases to generate trimacrocycle microviridin analogs with non-native cross-links. The results demonstrate that diverse chemistries are tolerated by macrocyclases in the ATP-grasp family and allow for the construction of unique cyclic peptide architectures that retain protease inhibition activity. In addition, cocomplex structures of analogs bound to a model protease were determined, illustrating how changes in functional groups maintain peptide conformation and target binding.
Organizational Affiliation: 
Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.