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  • Title: Biotransformation of Fructose to Allose by a One-Pot Reaction Using Flavonifractor plautiiD-Allulose 3-Epimerase and Clostridium thermocellum Ribose 5-Phosphate Isomerase.
    Author: Lee TE, Shin KC, Oh DK.
    Journal: J Microbiol Biotechnol; 2018 Mar 28; 28(3):418-424. PubMed ID: 29316745.
    Abstract:
    D-Allose is a potential medical sugar because it has anticancer, antihypertensive, anti-inflammatory, antioxidative, and immunosuppressant activities. Allose production from fructose as a cheap substrate was performed by a one-pot reaction using Flavonifractor plautiiD-allulose 3-epimerase (FP-DAE) and Clostridium thermocellum ribose 5-phosphate isomerase (CT-RPI). The optimal reaction conditions for allose production were pH 7.5, 60°C, 0.1 g/l FP-DAE, 12 g/l CT-RPI, and 600 g/l fructose in the presence of 1 mM Co2+. Under these optimized conditions, FP-DAE and CT-RPI produced 79 g/l allose for 2 h, with a conversion yield of 13%. This is the first biotransformation of fructose to allose by a two-enzyme system. The production of allose by a one-pot reaction using FP-DAE and CT-RPI was 1.3-fold higher than that by a two-step reaction using the two enzymes.
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