目的对家蚕过敏原tropomyosin基因进行克隆表达,鉴定其免疫学活性。方法本研究提取家蚕总RNA,采用RT-PCR方法有效地扩增出tropomyosin片段,其长度为858bp,编码286个氨基酸。通过连入载体PET28a在大肠杆菌EscherichiacoliBL21(DE3)菌株中通过IPTG诱导得到重组家蚕原肌球蛋白。重组家蚕原肌球蛋白经过6His-tag蛋白纯化系统分离、纯化。经Westernblot检测该重组蛋白与家蚕过敏患者血清中IgE的反应性。结果19个病人血清反应中,有5个呈阳性,阳性率为26%。结论成功克隆表达了家蚕tropomyosin基因,经免疫学鉴定发现其具有过敏原性。
Objective To clone and express the gene of silkworm (Bombyx mori) tropomyosin,and detect the immunological activity of silkworm tropomyosin. Methods Tropomyosin of silkworm was amplified from total RNA by RT-PCR. The length of the silkworm tropomyosin fragment was 858 bp including an open reading frame coding for 286 amino acids. The recombinant silkworm tropomyosin was expressed in Escherichia coli BL21(DE3) after vector PET28a transfection,and then the recombinant protein was purified by affinity chromato...