家蚕抗BmNPV品系与感性品系血淋巴液蛋白质组的差异分析

Differential Expression of Haemolymph Proteome of Resistant Strain and Susceptible Strain for BmNPV in Bombyx mori L.

利用遗传学的原理,通过杂交和回交的方法,建立家蚕抗BmNPV、感BmNPV以及近等基因系模型,利用2-D电泳和MALDI TOF/TOF MS质谱技术,从蛋白质组水平上研究家蚕对BmNPV抵抗性。其结果是获得家蚕高抗NB,高感306,近等基因系BC_8五龄起蚕血淋巴液蛋白质差异表达谱,分别获得180、190、187个蛋白点,其中80%的蛋白点集中在等电点5～9范围之内。从三块凝胶上共获得明显差异蛋白点12个,由质谱鉴定出5种蛋白,其中氨基酰化酶(Aminoacylase)仅出现在抗性品系NB、近等基因系图谱中,感性品系没有出现,初步推测是家蚕抗BmNPV特有蛋白,这是首次报道结果。

Three model silkworms, highly resistant strain, highly susceptible strain and their near isogenic line were established by hybridization and backcross. The resistance of silkworm （Bombyx mori L.） to BmNPV was studied at proteomic level using two-dimensional gel electrophoresis and MALDI TOF/TOF MS. Differential expression profiles of proteome in resistant strain, susceptible strain and near isogenic line were obtained, and 180, 190 and 187 of protein spots were shown, respectively. Among them, 80% were concentrated in pI 5-9. Twelve differential protein spots in total were obtained from 3 gels. Using MALDI TOF/TOF MS, five proteins, including aminoacylase, were identified from these spots. The exclusive expression of aminoacylase in highly resistant strain and near isogenic line and its absence in susceptible strain suggest that it might be a BmNPV-resistance related protein.