title: Expression and secretion of a single-chain sweet protein monellin in Bacillus subtilis by sacB promoter and signal peptide.
abstract: The sweet protein monellin gene was expressed in Bacillus subtilis under the control of the Bacillus subtilis sacB promoter and signal peptide sequence. A 294-bp DNA fragment, coding for sweet protein monellin, was ligated into the Escherichia coli/B. subtilis shuttle vector pHPC, producing pHPMS, which was subsequently transformed into B. subtilis QB1098, DB104, and DB403. The peptide efficiently directed the secretion of monellin from the recombinant B. subtilis cells. A maximum yield of monellin of 0.29 g protein l(-1) was obtained from the supernatant of B. subtilis DB403 harboring pHPMS. SDS-PAGE confirmed the purity of the recombinant product.
authors.affiliation: College of Food Science and Engineering, Inner Mongolia Agricultural University, 010018, Huhhot, People's Republic of China.
authors.forename: Zhongjun
authors.initials: Z
authors.lastname: Chen
authors.forename: Cai
authors.initials: C
authors.lastname: Heng
authors.forename: Zhengying
authors.initials: Z
authors.lastname: Li
authors.forename: Xinle
authors.initials: X
authors.lastname: Liang
authors.forename: Shangguan
authors.initials: S
authors.lastname: Xinchen
mesh_terms: D001412:Bacillus subtilis / Q000235:genetics* / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics; D015870:Gene Expression; D005822:Genetic Vectors / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D011401:Promoter Regions, Genetic / Q000235:genetics*; D015202:Protein Engineering / Q000379:methods; D021382:Protein Sorting Signals / Q000235:genetics*; D011994:Recombinant Proteins / Q000378:metabolism*; D015203:Reproducibility of Results; D013549:Sweetening Agents / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D010940:Plant Proteins; D021382:Protein Sorting Signals; D011994:Recombinant Proteins; D013549:Sweetening Agents; C002541:monellin protein, Dioscoreophyllum cumminsii