Selective Late-Stage Functionalization of Tryptophan-Containing Peptides To Facilitate Bioorthogonal Tetrazine Ligation
作者:Nagaraju Mupparapu、Basir Syed、Diem N. Nguyen、Thao H. Vo、Angelica Trujillo、Sherif I. Elshahawi
DOI:10.1021/acs.orglett.4c00709
日期:2024.3.29
modification of complex peptides and the functionalization of their C–H bonds hold great promise for expanding their use in therapeutics and biomedical research. Herein, we leverage the power of late-stage chemoenzymatic catalysis using an indole prenyltransferase (IPT) enzyme and alkyl diphosphates to specifically modify the indole ring of tryptophan in clinically relevant peptides. Furthermore, the installed
Chemoenzymatic synthesis of daptomycin analogs active against daptomycin-resistant strains
作者:Erin M. Scull、Chandrasekhar Bandari、Bryce P. Johnson、Eric D. Gardner、Marco Tonelli、Jianlan You、Robert H. Cichewicz、Shanteri Singh
DOI:10.1007/s00253-020-10790-x
日期:2020.9
C6 positions of the indole ring. In vitro antibacterial activity assays using 16 daptomycin analogs revealed that some of the analogs displayed 2-80-fold improvements in potency against MRSA, VRE, and daptomycin-resistant strains of S. aureus and Enterococcus faecalis. Thus, along with the new potent analogs, these findings have established that the regio-chemistry of alkyl substitution on the tryptophan
Probing the Substrate Promiscuity of Isopentenyl Phosphate Kinase as a Platform for Hemiterpene Analogue Production
作者:Sean Lund、Taylor Courtney、Gavin J. Williams
DOI:10.1002/cbic.201900135
日期:2019.9.2
alcohols into pyrophosphates that could be coupled to downstream isoprenoid biosynthesis. To be successful, each kinase in this pathway should be permissive of a broad range of substrates. For the first time, we have probed the promiscuity of the second enzyme in the ADH pathway-isopentenyl phosphate kinase from Thermoplasma acidophilum-towards a broad range of acceptor monophosphates. Subsequently, we evaluate