协调的基因家族进化塑造了二形性Mucorales的基因组
Ghizlane Tahiri1, María I Navarro-Mendoza2, Carlos Lax1
1Department of Genetics and Microbiology, Faculty of Biology, University of Murcia, Murcia, Spain.
Nature communications
|January 29, 2026
概括
模态真菌从一个基因组进化两种生命形式,通过基因家族进化. 这涉及到专门的基因拷贝和调节基因 (dkl,dfl),确保不同的酵母和菌发育.
科学领域:
- 菌类学 菌类学是指菌类学.
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
背景情况:
- 模态生物可以在酵母和菌形式之间切换,受环境线索的影响.
- 在单个基因组内产生两种不同的生命形式的遗传基础尚未完全理解.
- 菌的真菌表现出可逆的二态性,在酵母和菌根之间进行过渡.
研究的目的:
- 为了研究在Mucorales中的二态化背后的进化机制.
- 识别对两个不同的形态的发展负责的遗传因素和监管网络.
- 了解基因组如何容纳双重生命形式的遗传信息.
主要方法:
- 比较基因组学以确定跨二态物种的保存基因家族.
- 对基因家族进化的分析,包括对比功能和表达模式.
- 识别和描述控制二态的新型调节基因 (dkl,dfl).
- 调查二态基因家族和相关物种中的调控元素的保护.
主要成果:
- 数以百计的基因家族表现出对二形态的融合进化,具有专门的酵母和菌类型.
- 具有相关功能的二态基因家族以头对头结构组织,使得它们能够协调表达.
- 两种新的基因,dkl和dfl,被确定为差异性基因表达和二态化的关键调节者.
- 失去了dkl或dfl的功能导致全球基因失调和失去二态.
- 特定的遗传元素,包括二形基因家族,头对头位点和dfl基因,在二形物种中保留,但在单形亲属中不存在.
结论:
- 基因家族的融合进化,涉及并行功能化和协调表达,是真菌二态化的关键机制.
- 新的调节基因 (dkl,dfl) 和基因组结构 (头对头位置) 在管理不同生命形式的遗传信息方面发挥着至关重要的作用.
- 这些发现揭示了一种进化策略,用于整合和优化单个生物体内双重生命周期的遗传资源.
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