摘要
细胞凋亡在许多生理过程和免疫应答中发挥着重要的作用,BOK基因是细胞凋亡中一个关键的调控因子。本研究对斜带石斑鱼BOK(Ec-BOK)基因进行了克隆及功能分析。结果表明,Ec-BOK基因可以编码210个氨基酸,其含有4个保守的功能结构域(BH1-4)和1个跨膜区(TM),蛋白序列与深裂眶锯雀鲷该蛋白相似度最高,为97%。荧光定量分析表明Ec-BOK基因在多种组织中均有表达,其中肝脏和肾脏中表达量最高。经SGIV感染后,Ec-BOK基因表达上调,体外实验过表达Ec-BOK基因可以抑制病毒基因的转录。本研究结果表明,Ec-BOK基因在鱼类抗病毒免疫应答中可能发挥着重要作用
Apoptosis plays vital roles in many physiological process and immune response. BOK is one of the centralregulators in apoptosis. In this study, a new BOK homolog(Ec-BOK) was cloned and characterized from Orange-spotted grouper, Epinephelus coioides. Ec-BOK encoded a210 amino acid peptides which shared97% identity to Stegastes partitus BOK protein, contained four BH domains and one transmembrane region. Ec-BOK widely expressed in all analyzed tissues with the higher expressions in kidney and spleen.Its expression level was up-regulated after SGIV infection in vitro. Further analysis revealed that overexpression of Ec-BOK inhibited viral genes transcriptions and virus replication in fish cell. Our findingssuggested that Ec-BOK might play a role in the immune response against virus.
引文