title: Improvement of human interferon alpha secretion by Lactococcus lactis.
abstract: To improve the secretion and expression of human interferon alpha 2b (IFN) in Lactococcus lactis, a synthetic pro-peptide, LEISSTCDA (LEISS), was fused to the N-terminus of IFN. This gave a higher secretion efficiency (12% vs. 5%) and yield (approximately 2.8-fold) of IFN. The signal peptide, SP(SlpA) (SlpA, an S-layer protein of Lactobacillus brevis), was also tested to secrete IFN instead of SP(Usp45) (Usp45, the main secreted protein in L. lactis). This gave increased IFN secretion (approximately 3-fold) but lower total production. All the recombinant IFN had appropriate bioactivities in an antiviral assay.
authors.affiliation: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100101 Beijing, People's Republic of China.
authors.forename: Qiuxiang
authors.initials: Q
authors.lastname: Zhang
authors.forename: Jin
authors.initials: J
authors.lastname: Zhong
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Liang
authors.forename: Wenjun
authors.initials: W
authors.lastname: Liu
authors.forename: Liandong
authors.initials: L
authors.lastname: Huan
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology; D001426:Bacterial Proteins / Q000235:genetics; D015870:Gene Expression; D006801:Humans; D000077190:Interferon alpha-2; D016898:Interferon-alpha / Q000235:genetics / Q000378:metabolism*; D052196:Levilactobacillus brevis / Q000235:genetics; D013294:Lactococcus lactis / Q000235:genetics / Q000378:metabolism*; D009500:Neutralization Tests; D021382:Protein Sorting Signals; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins; D018116:Vesiculovirus / Q000187:drug effects
chemical_list: D000998:Antiviral Agents; D001426:Bacterial Proteins; D000077190:Interferon alpha-2; D016898:Interferon-alpha; D021382:Protein Sorting Signals; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins; C070683:surface layer protein A, Bacteria