Analysis of biochemical properties including cross-linking degree of disulfide bond between P24 subunits of HBs Ag expressed in recombinant Hansenula polymorpha
目的分析重组汉逊酵母(Hansenula polymorpha,HP)表达的HBs Ag(HP-HBs Ag)P24亚基间二硫键桥联程度等生化性状。方法采用蔗糖垫层离心法检测HBs Ag的浮力密度,SDS-PAGE分析HBs Ag P24亚基间结合程度的变化,高效液相色谱法(high performance liquid chromatography,HPLC)分析HBs Ag VLP在硫氰酸盐处理前后百分含量的变化。以酿酒酵母(Saccharomyces cervesiae,SC)表达的HBs Ag(SC-HBs Ag)作为对照。结果 HP-HBs Ag的浮力密度为(1.085±0.014)g/ml,与SC-HBs Ag的浮力密度[(1.090±0.009)g/ml]接近。SDS-PAGE分析表明,未经硫氰酸盐处理时,HP-HBs Ag不能进入分离胶,而SC-HBs Ag能进入分离胶;经硫氰酸盐处理后,HP-HBs Ag和SCHBs Ag均不能进入分离胶。HPLC分析表明,流动相中含SDS时,HP-HBs Ag VLP的百分含量在经硫氰酸盐处理前后变化不明显,SC-HBs Ag VLP的百分含量在经硫氰酸盐...
【英文摘要】
Objective To analyze the biochemical properties including the cross-linking degree of disulfide bond between P24 subunits of HBs Ag expressed in recombinant Hansenula polymorpha(HP-HBs Ag). Methods The buoyant density of HBs Ag was determined by sucrose cushion centrifugation, while the cross-linking degree betweens P24 subunits of HBs Ag by SDS-PAGE, and the percents of HBs Ag VLPs before and after treatment with thiocyanate by HPLC. The HBs Ag expressed in recombinant Saccharomyces cervesiae(SC-HBs Ag) wa...
【基金】
艾滋病和病毒性肝炎等重大传染病防治国家科技重大专项(2012ZX10002002-002)
【更新日期】
2016-08-15
【分类号】
TQ920.1
【正文快照】
乙型肝炎病毒(hepatitis B virus,HBV)感染是人类面临的重大健康问题,全球约有3.6亿慢性HBV感染者[1]。中国虽已由高流行区变为中、高流行区[2],但面临的形势依然严峻,接种以HBV表面抗原(HBs Ag)为关键有效成分的乙型肝炎疫苗是目前控制HBV感染的最经济有效手段[2-3]。重组酵母