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八眉猪DRA基因编码区多态性及生物信息学分析

DOI: 10.7668/hbnxb.2015.04.012, PP. 66-71

Keywords: 八眉猪,DRA基因,编码区,多态性,生物信息学

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Abstract:

为了探讨八眉猪DRA基因的遗传特性及其在抗病育种和猪-人异种器官移植中的应用前景,采用克隆测序的方法对该基因编码区进行多态性分析,并利用生物信息学方法预测该基因编码氨基酸的理化特性和结构功能,同时对该基因进行同源性分析。结果显示,八眉猪DRA基因编码252个氨基酸,编码区有5个核苷酸和2个氨基酸变异位点。DRA基因编码产物是一种不稳定的不可溶蛋白,二级结构为混合型,无规则卷曲所占比例最高。蛋白质功能预测结果显示,DRA基因免疫应答几率最高(4.405)。同源性分析发现,八眉猪DRA氨基酸与其他猪种的相似度在98%以上,与人的相似度达到83%,在CD4分子结合部位与人类相应的DRA仅存在1个氨基酸差异,具有在异种移植排斥反应中利用的潜力。研究结果为八眉猪的抗病分子育种和猪-人异种器官移植提供理论依据。

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