[EN] METHODS FOR PRODUCING D-TRYPTOPHAN AND SUBSTITUTED D-TRYPTOPHANS<br/>[FR] PROCÉDÉS DE PRODUCTION DE D-TRYPTOPHANE ET DE D-TRYPTOPHANES SUBSTITUÉS
申请人:UNIV CALIFORNIA
公开号:WO2021055696A1
公开(公告)日:2021-03-25
Single-module nonribosomal peptide synthetases (NRPSs) and NRPS-like enzymes activate and transform carboxylic acids in both primary and secondary metabolism; and are of great interest due to their biocatalytic potentials. The single-module NRPS IvoA is essential for fungal pigment biosynthesis. As disclosed herein, we show that IvoA catalyzes ATP-dependent unidirectional stereoinversion of L-tryptophan to D-tryptophan with complete conversion. While the stereoinversion is catalyzed by the epimerization (E) domain, the terminal condensation (C) domain stereoselectively hydrolyzes D-tryptophanyl-S-phosphopantetheine thioester and thus represents a noncanonical C domain function. Using IvoA, we demonstrate a biocatalytic stereoinversion/deracemization route to access a variety of substituted D-tryptophan analogs in high enantiomeric excess.
One-Pot Biocatalytic Synthesis of Substituted<scp>d</scp>-Tryptophans from Indoles Enabled by an Engineered Aminotransferase
作者:Fabio Parmeggiani、Arnau Rué Casamajo、Curtis J. W. Walton、James L. Galman、Nicholas J. Turner、Roberto A. Chica
DOI:10.1021/acscatal.9b00739
日期:2019.4.5
d-Tryptophan and its derivatives are important precursors of a wide range of indole-containing pharmaceuticals and naturalproducts. Here, we developed a one-pot biocatalytic process enabling the synthesis of d-tryptophans from indoles in good yields and high enantiomeric excess (91% to >99%). Our method couples the synthesis of l-tryptophans catalyzed by Salmonella enterica tryptophan synthase with
Complete Stereoinversion of <scp>l</scp>-Tryptophan by a Fungal Single-Module Nonribosomal Peptide Synthetase
作者:Yang Hai、Matthew Jenner、Yi Tang
DOI:10.1021/jacs.9b08898
日期:2019.10.16
Single-module nonribosomal peptide synthetases (NRPSs) and NRPS-like enzymes activate and transform carboxylic acids in both primary and secondary metabolism and are of great interest due to their biocatalytic potentials. The single-module NRPS IvoA is essential for fungal pigment biosynthesis. Here, we show that IvoA catalyzes ATP-dependent unidirectional stereo inversion of L-tryptophan to D-tryptophan with complete conversion. While the stereoinversion is catalyzed by the epimerization (E) domain, the terminal condensation (C) domain stereoselectively hydrolyzes D-tryptophanyl-S-phosphopantetheine thioester and thus represents a noncanonical C domain function. Using IvoA, we demonstrate a biocatalytic stereoinversion/deracemization route to access a variety of substituted D-tryptophan analogs in high enantiomeric excess.
Deracemization and Stereoinversion to Aromatic <scp>d</scp>-Amino Acid Derivatives with Ancestral <scp>l</scp>-Amino Acid Oxidase
作者:Shogo Nakano、Yuki Minamino、Fumihito Hasebe、Sohei Ito
DOI:10.1021/acscatal.9b03418
日期:2019.11.1
pure amino acid derivatives could be foundational compounds for peptide drugs. Deracemization of racemates to l-amino acid derivatives can be achieved through the reaction of evolved d-aminoacidoxidase and chemical reductants, whereas deracemization to d-aminoacid derivatives has not progressed due to the difficulty associated with the heterologous expression of l-amino acidoxidase (LAAO). In this