Five isolates of pigeon paramyxovirus Ⅰ（PPMV-Ⅰ）,designated as YZ9712,NC9701,NP9904,PB9601 and SZa9803,were isolated from pigeons during epizootics recently in *** F gene functional domains were amplified by RT-PCR...
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Five isolates of pigeon paramyxovirus Ⅰ（PPMV-Ⅰ）,designated as YZ9712,NC9701,NP9904,PB9601 and SZa9803,were isolated from pigeons during epizootics recently in *** F gene functional domains were amplified by RT-PCR and then cloned into pGEMDR○-T vector and sequenced.A phylogenetic tree based on nucleotide sequence of the F gene segment revealed all the strains were divided into seven genotypes,and five PPMV-Ⅰ isolates similar to strains 1168/84 and 760/83 were grouped into subgenotype Ⅵ*** homology between these five isolates were 98.3%～99.4% and 97.8%～99.4% at the nucleotide and amino acid levels *** deduced amino acid sequence at the cleavage site of the F protein was of virulent strains112K-R-Q-K-R-F117?All the isolates had highly genetic similarity to the England reference strain 1168/84 and Wales reference strain 760/83 of PPMV-Ⅰ,suggesting that they might have originated from a common ancestor.
根据已报道的猪链球菌2型(Streptococcus suis type2,SS2)重要毒力因子溶血素的基因序列，利用DNAstar软件选择抗原性好的一段基因序列，设计并合成该段序列的1对特异性引物。以四川强毒株ZY05719的基因组为模板，PCR扩增后定向克隆至pE...
详细信息
根据已报道的猪链球菌2型(Streptococcus suis type2,SS2)重要毒力因子溶血素的基因序列，利用DNAstar软件选择抗原性好的一段基因序列，设计并合成该段序列的1对特异性引物。以四川强毒株ZY05719的基因组为模板，PCR扩增后定向克隆至pET-32a表达载体中;重组质粒转化至原核系统大肠杆菌B21中，经诱导表达目的蛋白后，利用小鼠进行免疫效果的测定和佐剂筛选，结果使用ISA206佐剂的溶血素(Hly)蛋白亚单位疫苗保护率高。
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