尼罗罗非鱼Cullin-1基因克隆及表达Cloning and Tissue Expression Analysis of the Cullin-1 in Nile Tilapia (Oreochromis niloticus)
刘鑫潮,黄瑜,简纪常
摘要(Abstract)：
【目的】探究尼罗罗非鱼(Oreochromis niloticus)Cullin-1(CUL1)基因在尼罗罗非鱼抵抗病原细菌过程中的作用。【方法】从尼罗罗非鱼脾脏组织中克隆Cullin-1基因(记为On-CUL1),对其进行生物信息学分析,应用实时荧光定量PCR技术分析On-CUL1在健康鱼胸腺、鳃、肝、脾、肠道、头肾、脑、肌肉、皮肤、血液组织,以及经无乳链球菌刺激后病鱼脾、肠道、头肾中的表达。【结果与结论】On-CUL1(GenBank登录号XM_003459470.5)编码区为2 331 bp,编码776个氨基酸,理论分子质量为89 ku,理论等电点为8.16。氨基酸序列分析显示,On-CUL1有1个高度保守的泛素样蛋白结构域CUL1 Nedd8(ubiquitin-like domain),N′端有一个的信号肽序列。系统进化树分析表明,On-CUL1序列与伯氏拟丽鱼(Haplochromisburtoni)CUL1相似性最高,为98.7%。q RT-PCR显示CUL1在健康尼罗罗非鱼各组织中均有表达,其中在头肾中表达量最高,其次是胸腺、脑、皮肤,在肠道中表达量最低。经无乳链球菌刺激后,On-CUL1表达量在脾脏和肠道中均显著上调,头肾、脾脏和肠道均在48h表达量最大。CUL1参与尼罗罗非鱼抵抗无乳链球菌过程中的免疫应答。
关键词(KeyWords)： 尼罗罗非鱼;CUL1;基因表达;免疫应答;无乳链球菌
基金项目(Foundation): 国家自然科学基金(31572651);; 高校重大科研成果培育计划类项目(GDOU2013050309);; 广东省普通高校青年创新人才项目(230419083)
作者(Author): 刘鑫潮,黄瑜,简纪常
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