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  • Title: Novel cellulase recycling method using a combination of Clostridium thermocellum cellulosomes and Thermoanaerobacter brockii β-glucosidase.
    Author: Waeonukul R, Kosugi A, Prawitwong P, Deng L, Tachaapaikoon C, Pason P, Ratanakhanokchai K, Saito M, Mori Y.
    Journal: Bioresour Technol; 2013 Feb; 130():424-30. PubMed ID: 23313689.
    Abstract:
    This report describes a novel recycling method utilizing a combination of Clostridium thermocellum cellulosomes and Thermoanaerobacter brockii β-glucosidase (CglT). To recover cellulosomes and CglT through re-binding to additional cellulose, a chimeric CBM3-CglT was created by fusing carbohydrate binding module (CBM3) from the scaffolding protein CipA into the N-terminal region of CglT. When a recycling test using cellulosomes and CBM3-CglT was performed on microcrystalline cellulose, the process was capable of 4 rounds of recycling (1%w/vcellulose/round). Although irreversible absorption of cellulosomes and CBM3-CglT into the residues was observed when ammonia-pretreated rice straw and delignified rice straw was used as substrates, a maximum of 2 and 4 recycling rounds (1%w/vglucan/round) were achieved, respectively, consistent with a 70% saccharification rate. This novel recycling method using cellulosomes and CBM3-CglT has great potential as an effective lignocellulose degradation system.
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