柯萨奇A2、A4、A6、A10和A12型病毒的密码子使用偏好性分析Codon Usage Bias of Coxsackievirus A2, A4, A6, A10 and A12
姚雪;谢彬;韦庆娟;王敏;宗帅;胡弢;高蕾;邢薇佳;王建醒;李娟;
摘要(Abstract):
近年来,引起手足口病的多种柯萨奇病毒逐渐引起人们的关注。为探索柯萨奇病毒进化和变异的潜在机制,本文以柯萨奇A2、A4、A6、A10、A12五种型别病毒的全基因组RNA为研究对象,针对编码结构蛋白的P1区和编码非结构蛋白的P2-P3区基因,分别计算五种型别柯萨奇病毒的核苷酸和氨基酸遗传距离、相对同义密码子使用度(Relative synonymous codon usage,RSCU)、有效密码子数(Effective number of codon,ENC),并进行中性进化分析以及对应分析。结果表明,五种型别柯萨奇病毒的密码子使用均存在多样性,偏倚较弱;与G/C相比,它们的密码子第三位更偏向于使用A/U。ENC-plot分析表明,五种型别柯萨奇病毒P1区受到的突变压力作用均强于P2-P3区。然而,中性进化和对应分析的结果提示,突变压力对这些病毒密码子偏倚的形成仅起着较小的作用,而自然选择在病毒的进化过程中起着更重要的作用。本研究基于密码子水平的生物信息学分析,评估了突变压力和自然选择在柯萨奇A2、A4、A6、A10、A12这五种型别病毒进化中的作用,为深入了解柯萨奇病毒的遗传进化机制提供了理论依据。
关键词(KeyWords): 柯萨奇病毒;密码子使用分析;中性进化;突变压力
基金项目(Foundation): 国家自然科学基金(项目号:81902065),题目:长链非编码RNA-RP11-54O7.17下调干扰素刺激基因15(ISG15)表达促进EV71感染致重症的机制研究;; 山东省自然科学基金(项目号:ZR2018PH034),题目:柯萨奇病毒A2型分子流行病学特征及对ICR鼠中枢神经系统致病性研究;; 泰山学者青年专家计划项目~~
作者(Authors): 姚雪;谢彬;韦庆娟;王敏;宗帅;胡弢;高蕾;邢薇佳;王建醒;李娟;
DOI: 10.13242/j.cnki.bingduxuebao.004257
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