Purification and characterization of a novel carbonyl reductase involved in oxidoreduction of aromatic β-amino ketones/alcohols
摘要:
Aromatic beta-amino ketones/alcohols such as adrenalone play an important role in some stereoselective synthesis of pharmaceuticals. Unfortunately, the transformation of aromatic beta-amino ketones to their chiral alcohols has been carried out chemically as no corresponding biocatalyst has been available. Here, a novel carbonyl reductase responsible for the reduction of adrenalone to (R)-(-)-epinephrine was identified and characterized from Kocuria rhizophila. This enzyme was purified to homogeneity by ammonium sulfate precipitation followed by ion-exchange column chromatography, hydrophobic chromatography and gel chromatography. The purified enzyme yielded pure (R)-enantiomer product with high activity and utilized NADH as the cofactor. The enzyme had special significance by showing selectivity for many aromatic beta-amino ketones/alcohols such as 2-amino-acetophenone, 2-amino-4'-hydroxyacetophenone, isoproterenol and ephedrine. The maximum reaction rate (V-max) and apparent Michaelis-Menten constant (K-m) for adrenalone and NADH were 14.62 mu mol/(min mg) protein and 0.189 mM, 11.66 mu mol/(min mg) protein and 0.204 mM respectively. These properties ensure the enzyme a promising future for industrial application as a replacement of chemical synthesis of aromatic beta-amino chiral alcohols. (C) 2014 Elsevier Ltd. All rights reserved.
[EN] PREPARATION METHOD FOR DRUG-LINKER MC-MMAF USED FOR ANTIBODY DRUG CONJUGATES AND INTERMEDIATE THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DE MÉDICAMENT-LIEUR MC-MMAF UTILISÉ POUR DES CONJUGUÉS MÉDICAMENT-ANTICORPS ET INTERMÉDIAIRE DE CEUX-CI<br/>[ZH] 一种用于抗体药物偶联物的药物-连接子MC-MMAF的制备方法及其中间体
IDENTIFICATION AND TARGETED MODULATION OF GENE SIGNALING NETWORKS
申请人:CAMP4 THERAPEUTICS CORPORATION
公开号:US20210254056A1
公开(公告)日:2021-08-19
The present invention provides methods and compositions for the evaluation, alteration and/or optimization of gene signaling. Methods and systems are also provided which exploit the information generated in the identification of new targets and non-canonical signaling pathways.