Recombinant GH5_8 mannanase from Hungateiclostridium cellulolyticum: Biochemical and structural characteristics and applications for mannooligosaccharides production from spent coffee grounds

IF 3.5 2区农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Food and Bioproducts Processing Pub Date : 2025-03-03 DOI:10.1016/j.fbp.2025.02.014

Guilherme Romualdo Silva , Caio Cesar de Mello Capetti , Andrei Nicoli Gebieluca Dabul , Marcelo Vizoná Liberato , Antonio Aprigio da Silva Curvelo , Vanessa O. Arnoldi Pellegrini , Igor Polikarpov

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引用次数: 0

Abstract

Abundant agro-industrial residues, spent coffee grounds (SCG), are rich in polysaccharides, notably mannan, rendering them a promising substrate for the production of mannooligosaccharides (MOS) with potential nutraceutical applications. This work reports cloning, heterologous expression in E. coli Arctic Express and biochemical characterization of Hungateiclostridium cellulolyticum mannanase from GH5 family (HcGH5_8) and its application for producing MOS from pretreated SCG. The enzyme displayed optimal activity at pH 7.0 and 50 °C, with a specific activity of 687 ± 53 U/mg against konjac glucomannan under optimal conditions. Furthermore, hydrolysis of the SCG resulted in the release of mannobiose (M2), mannotriose (M3), and mannotetraose (M4) as the primary hydrolytic products. The impacts of different hydrothermal pretreatment conditions on the yields of the enzymatically-produced MOS were investigated.

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来源期刊

Food and Bioproducts Processing 工程技术-工程：化工

CiteScore

9.70

自引率

4.30%

发文量

115

审稿时长

24 days

期刊介绍： Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.