摘要
为了对羊源捻转血矛线虫(H.contortus)15ES抗原基因进行原核表达,本研究利用RT-PCR技术从黑龙江省羊源H. contortus成虫总RNA中扩增得到相对分子质量15kuES蛋白基因(H15ES),序列分析表明,其核苷酸序列与国外已发表的15ku排泄分泌抗原基因的同源性为99.78%。将H15ES克隆至pET-32a(+)中,构建重组表达质粒pET-32a-H15ES,转化大肠杆菌,IPTG诱导表达,经SDS-PAGE电泳和western blot分析表明,表达蛋白相对分子质量约为35.2ku。本研究为H. contortus病诊断抗原和保护性抗原的大量制备及H. contortus核酸疫苗的研究奠定了基础。
The 15 ku ES antigen gene was amplified by RT-PCR from the total RNA extracted from the Haemonchus contorms. Sequence analysis showed that the gene was 99.78 % identical to the 15 ku ES antigen gene in the GenBank. The H15 ES antigen gene was cloned into prokaryotic expression vector pET-32a(+) and expressed in E. coil The expression products were detected by SDS-PAGE and confirmed by western blot. The recombinant protein could serve as diagnostic and protective antigen of Haemonchosis.
出处
《中国预防兽医学报》
CAS
CSCD
北大核心
2009年第12期982-984,共3页
Chinese Journal of Preventive Veterinary Medicine
基金
东北农业大学科学研究基金
哈尔滨市科技创新人才研究专项资金(2006RFQXN016)
十一五黑龙江省重大专项科技攻关计划项目(GA06B202-3)
黑龙江省自然科学基金(c200929)
关键词
捻转血矛线虫
排泄分泌抗原
克隆
原核表达
Haemonchus contortus
excretory-secretory antigen
clone
prokaryotic expression