特定物种的圆形RNAcircDS-1通过调节二态转变来增强Talaromyces marneffei的适应性进化
Xueyan Hu1, Minghao Du2, Changyu Tao3
1Department of Medical Bioinformatics, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.
PLoS genetics
|March 6, 2025
概括
这项研究揭示了循环RNAs (circRNAs) 对真菌的热适应至关重要. 一个特定的circRNA,circDS-1,驱动Talaromyces marneffei转化为酵母,影响病毒性.
科学领域:
- 菌类学 菌类学是指菌类学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 哺乳动物病原菌需要热适应性才能在宿主环境中生存.
- 热二形真菌根据温度的反应在菌和酵母形式之间切换.
- 非编码的遗传元素,特别是circRNAs,在真菌适应中扮演着被低估的角色.
研究的目的:
- 在菌株和酵母条件下系统地描述Talaromyces marneffei的全长circRNA景观.
- 确定涉及T. marneffei.热变态和毒性的特定circRNAs.
- 阐明基底的分子机制circRNA生成和功能在真菌适应.
主要方法:
- 使用下一代和第三代测序优化了用于circRNA检测的整合管道.
- 分析了circRNA特征,包括长度,丰度和拼接模式.
- 通过实验方法验证了已识别的circRNAs的功能,重点是circDS-1.
主要成果:
- Talaromyces marneffei circRNAs的长度较短,丰度较低,并且具有循环化偏差的拼接.
- 鉴定出 circDS-1 是一个关键的调节器,促进了菌转化为酵母,并维持了酵母形态.
- circDS-1的生成是由T. marneffei特定的内基区域驱动的,这表明了适应性进化.
结论:
- circRNAs对于真菌的热适应和毒性至关重要.
- circDS-1代表了功能性circRNAs适应性进化的新型分子机制.
- 这些发现为管理真菌热变态的非编码调节元素提供了新的见解.
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