1. Downscale fermentation for xylooligosaccharides production by recombinant Bacillus subtilis 3610
- Author
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Raquel Filipa Silva Gonçalves, Manuel A. Coimbra, Elisabete Coelho, Kristala L. J. Prather, Ana Cristina Pinheiro, Cláudia Amorim, Sara C. Silvério, Soraia Micaela Silva, Lígia R. Rodrigues, and Universidade do Minho
- Subjects
Polymers and Plastics ,medicine.medical_treatment ,Oligosaccharides ,Glucuronates ,02 engineering and technology ,Bacillus subtilis ,010402 general chemistry ,01 natural sciences ,xylan ,Xylooligosaccharides ,Bacterial Proteins ,Materials Chemistry ,medicine ,Fagus ,Food science ,Trichoderma reesei ,2. Zero hunger ,chemistry.chemical_classification ,Trichoderma ,xylanase ,Endo-1,4-beta Xylanases ,Science & Technology ,biology ,Chemistry ,Prebiotic ,Organic Chemistry ,Temperature ,Oligosaccharide ,Hydrogen-Ion Concentration ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Xylan ,0104 chemical sciences ,Prebiotics ,Yield (chemistry) ,Fermentation ,prebiotic ,Xylanase ,Xylans ,0210 nano-technology ,Genetic Engineering - Abstract
Supplementary material related to this article can be found, in the online version, at doi:https://doi.org/10.1016/j.carbpol.2018.09.088., The global demand of prebiotics such as xylooligosaccharides (XOS) has been growing over the years, motivating the search for different production processes with increased efficiency. In this study, a cloned Bacillus subtilis 3610, containing the xylanase gene xyn2 of Trichoderma reesei coupled with an endogenous secretion tag, was selected for XOS production through direct fermentation of beechwood xylan. A mixture of XOS with a degree of polymerization ranging from 4-6 was obtained, presenting high stability after a static in vitro digestion (98.5±0.2%). The maximum production yield expressed as total XOS per amount of xylan (306±4mg/g) was achieved after 8h of fermentation operating under one-time impulse fed-batch. The optimal conditions found were pH 6.0 and 42.5°C, using 2.5g/L of initial concentration of xylan increased up to 5.0g/L at 3h. Xylopentaose was the major oligosaccharide produced, representing 47% of the total production yield., CA, SCS, ACP, EC and LRR acknowledge their grants (PD/BD/ 105870/2014, SFRH/BPD/88584/2012, SFRH/BPD/ 101181/2014, SFRH/BPD/70589/2010 and SFRH/BSAB/142873/2018) from Portuguese Foundation for Science and Technology (FCT). The study received financial support from FCT under the scope of the strategic funding of UID/BIO/04469/2013 unit; COMPETE 2020 (POCI-010145-FEDER-006684); QOPNA research Unit (FCT UID/QUI/00062/ 2013), through national founds and where applicable co-financed by the FEDER, within the PT2020 Partnership Agreement; the Project MultiBiorefinery (POCI-01-0145-FEDER-016403); the Project FoSynBio (POCI-01-0145-FEDER-029549) and Lignozymes (POCI-01-0145FEDER-029773). The authors also acknowledge BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte., info:eu-repo/semantics/publishedVersion
- Published
- 2019