Molecular Dynamics Simulations Guide Chimeragenesis and Engineered Control of Chemoselectivity in Diketopiperazine Dimerases
作者:Vikram V. Shende、Natalia R. Harris、Jacob N. Sanders、Sean A. Newmister、Yogan Khatri、Mohammad Movassaghi、Kendall N. Houk、David H. Sherman
DOI:10.1002/anie.202210254
日期:——
The high-resolution crystalstructure of C−N bond forming diketopiperazine dimerase, AspB, was solved. However, the near complete superposition of active site residues and bound substrates in AspB/NzeB masked the molecular basis for their orthogonal chemoselectivities. Molecular dynamics simulations guided rational chimeragenesis to reprogram NzeB dimerase selectivity. Substrate mimics further validated
Two Cytochrome P450 Enzymes from <i>Streptomyces</i> sp. NRRL S-1868 Catalyze Distinct Dimerization of Tryptophan-Containing Cyclodipeptides
作者:Huili Yu、Shu-Ming Li
DOI:10.1021/acs.orglett.9b02666
日期:2019.9.6
Heterologous expression in Streptomyces coelicolor and in vitro enzyme characterization proved that two P450 enzymes, AspB and NasB, from Streptomyces sp. NRRL S-1868 catalyze two new dimerization patterns of tryptophan-containing cyclodipeptides. Structure elucidation of the metabolites revealed an N1-C7' dimer of two cWP molecules as the predominant product of AspB and C3-C7' connected cWP with cWA as that of NasB.