基因组多样性和马匹马马病毒5分离体的自然重组
Adepeju E Onasanya1, Charles El-Hage2, Andrés Diaz-Méndez1
1The Asia-Pacific Centre for Animal Health, Veterinary Biosciences, Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Parkville, Victoria 3010, Australia.
概括
重组显著促进了马类疹病毒5 (EHV5) 在马中的遗传多样性. 这项研究强调重组是EHV5基因组变异的关键驱动因素,为病毒异质性提供了洞察力.
科学领域:
- 兽医病毒学 兽医病毒学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 马类疹病毒5 (EHV5) 在马群中普遍存在,通常会引起亚临床感染,但与呼吸系统问题有关,如马类多节管肺纤维化 (EMPF).
- 以前的研究表明,EHV5糖蛋白B (gB) 序列和单个马体内的多个基因型具有遗传异质性,但完整的基因组数据仍然很少.
- 这项研究旨在调查EHV5分离物中的基因组多样性和自然重组模式.
研究的目的:
- 为了评估马匹马病毒5 (EHV5) 隔离物的基因组多样性.
- 为了确定EHV5菌株之间的自然重组事件.
- 阐明重组在推动EHV5基因组异质性中的作用.
主要方法:
- 6个EHV5分离体的全基因组测序,其中4个来自单一的马.
- 对比基因组分析以确定核酸的身份,多样性,并确定高变异的区域.
- 使用RDP4和SplitsTree软件进行重组检测.
主要成果:
- EHV5的基因组大小在181,929至183,428个基因对之间.
- 六个EHV5基因组中的核酸序列相同性从95.5%到99.1%不等,平均核酸多样性为1%.
- 分析显示单个基因中显著的核酸多样性 (0-19%),其中8个基因在非同义替代中显示出高度多样性;检测到过去重组事件的证据.
结论:
- 重组是导致EHV5.5基因组多样性的重要因素.
- 识别重组热点可以了解EHV5基因组的遗传异质性.
- 了解重组的作用对于理解EHV5的演变及其对马类健康的影响至关重要.
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