PMID- 29911266 OWN - NLM STAT- MEDLINE DCOM- 20190212 LR - 20220408 IS - 1559-0291 (Electronic) IS - 0273-2289 (Linking) VI - 187 IP - 1 DP - 2019 Jan TI - One-Step Bioprocess of Inulin to Product Inulo-Oligosaccharides Using Bacillus subtilis Secreting an Extracellular Endo-Inulinase. PG - 116-128 LID - 10.1007/s12010-018-2806-3 [doi] AB - Inulo-oligosaccharides (IOSs), a novel food additive and health product, represent a promising alternative to antibiotics. As prebiotics, IOSs can be obtained from inulin by endo-inulinase-mediated hydrolysis. Nonetheless, enzymatic catalysis is not feasible industrially because of the required catalytic conditions and cost. In this study, a 2331-bp optimized gene inuQ (from Pseudomonas mucidolens) encoding endo-inulinase was cloned into shuttle vector PHY300PLK and transfected into Bacillus subtilis WB800-R, with the simultaneous deletion of gene sacC encoding levanase. The maximal IOS yield after hydrolysis of the crude extract of inulin was 67.84 +/- 0.72 g/L for a recombinant strain with the signal peptide nprB from alkaline protease and promoter P(43). The conversion rate reached 75.38%. For the major IOSs, the degree of polymerization was between 3 and 5. This study offers a simple and efficient one-step bioprocess for IOS production from inulin through secretion of an extracellular heterologous endo-inulinase by B. subtilis. FAU - Jiang, Ruifan AU - Jiang R AD - State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, People's Republic of China. AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. FAU - Qiu, Yibin AU - Qiu Y AD - State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, People's Republic of China. FAU - Huang, Weiwei AU - Huang W AD - State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, People's Republic of China. FAU - Zhang, Li AU - Zhang L AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. FAU - Xue, Feng AU - Xue F AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. FAU - Ni, Hao AU - Ni H AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. FAU - Mei, Difen AU - Mei D AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. FAU - Gao, Jian AU - Gao J AD - School of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. gaojian@ycit.edu.cn. FAU - Xu, Hong AU - Xu H AD - State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, People's Republic of China. xuh@njtech.edu.cn. LA - eng GR - Grant 21376203/National Natural Science Foundation of China/ GR - Grant JHB2011-54/the Promotion Program of Achievements in Scientific Research for Industrial Production of Higher Education of Jiangsu Province/ GR - Grant BE2012394/Qinglan Project of Higher Education of Jiangsu Province, Overseas Research & Training Program for University Prominent Young & Middle-aged Teachers and Presidents of Jiangsu Province, Jiangsu Agricultural Key Technology Research and Development Program/ PT - Journal Article DEP - 20180618 PL - United States TA - Appl Biochem Biotechnol JT - Applied biochemistry and biotechnology JID - 8208561 RN - 0 (Bacterial Proteins) RN - 0 (Oligosaccharides) RN - 0 (Recombinant Proteins) RN - 9005-80-5 (Inulin) RN - EC 3.2.1.- (Glycoside Hydrolases) RN - EC 3.2.1.7 (inulinase) SB - IM MH - Bacillus subtilis/*enzymology/genetics MH - Bacterial Proteins/biosynthesis/*chemistry/genetics MH - Glycoside Hydrolases/biosynthesis/*chemistry/genetics MH - Inulin/*chemistry MH - Oligosaccharides/*chemical synthesis/chemistry MH - Pseudomonas/enzymology/*genetics MH - Recombinant Proteins/biosynthesis/chemistry/genetics OTO - NOTNLM OT - Bacillus subtilis OT - Endo-inulinase OT - Inulin OT - Inulo-oligosaccharides EDAT- 2018/06/19 06:00 MHDA- 2019/02/13 06:00 CRDT- 2018/06/19 06:00 PHST- 2018/03/31 00:00 [received] PHST- 2018/06/03 00:00 [accepted] PHST- 2018/06/19 06:00 [pubmed] PHST- 2019/02/13 06:00 [medline] PHST- 2018/06/19 06:00 [entrez] AID - 10.1007/s12010-018-2806-3 [pii] AID - 10.1007/s12010-018-2806-3 [doi] PST - ppublish SO - Appl Biochem Biotechnol. 2019 Jan;187(1):116-128. doi: 10.1007/s12010-018-2806-3. Epub 2018 Jun 18.