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Many biologically active natural peptides are synthesized by nonribosomal peptide synthetases (NRPS). Product release is accomplished by dedicated thioesterase (TE) domains, some of which catalyze an intramolecular cyclization to form macrolactone or macrolactam cyclic peptides. The excised 28 kDa SrfTE domain, a member of the α/β hydrolase enzyme family, exhibits a distinctive bowl-shaped hydrophobic...
Background: A large number of pharmacologically important peptides are synthesized by multifunctional enzymes, the nonribosomal peptide synthetases (NRPSs). The thioesterase (Te) domain at the C-terminus of the last NRPS catalyzes product cleavage by hydrolysis or complex macrocyclization. Recent studies with excised Te domains and peptidyl-S-N-acetyl cysteamine substrate substitutes led to substantial...
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