插入序列IS711的基因组分布揭示了布鲁塞拉基因组可塑性和宿主偏好的潜在作用
Bessan Aljanazreh1, Assalla Abu Shamseye1, Abdalhalim Abuawad1
1Palestine-Korea Biotechnology Center, Palestine Polytechnic University, Hebron, Palestine.
概括
插入序列711 (IS711) 元素中的插入序列711 (IS711) 元素.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 插入序列711 (IS711) 是一种与布鲁塞拉属相关的移动遗传元件.
- 了解IS711的基因组分布对于阐明它在细菌进化和适应中的作用至关重要.
研究的目的:
- 将IS711在各种布鲁塞拉物种中的基因组分布映射出来.
- 调查IS711分布模式与布鲁塞拉进化,宿主适应和动物感染潜力之间的相关性.
主要方法:
- BLASTn序列对齐被用来识别来自9个物种的124个布鲁塞拉基因组中的IS711副本.
- 进行了基因组上下文分析,包括基因注释和合成定位,用于IS711 loci.
- 用Codon Tree方法构建了家族遗传树,并与IS711分布结合分析.
主要成果:
- 每个基因组的IS711拷贝数在物种和生物种之间相对保持.
- 较低的IS711副本数量 (4-8) 与养动物宿主和动物感染潜力相关,而较高的数量 (12-30) 与野生动物宿主相关.
- 确定了与布鲁塞拉进化相关的独特IS711分布模式,在基因组群岛内发现了46.2%的保存的IS711元素.
结论:
- IS711在布鲁塞拉的进化中发挥着重要作用,可能会影响适应不同宿主.
- 提出了一个模型,其中IS711获取和随后的转换爆发,由进化力量平衡,有助于基因组简化和适应.
- 假设IS711介导的基因组变化是布鲁塞拉适应不同动物宿主的关键驱动因素.
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