SID-2是一种保存的细胞外囊蛋白,与寄生性线虫中的环境RNAi无关
Frances Blow1, Kate Jeffrey1,2, Franklin Wang-Ngai Chow1,3
1Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3JT, UK.
Open biology
|November 6, 2024
概括
科学家在寄生性线虫中发现了SID-2蛋白,但它不会触发环境RNA干扰 (RNAi). 这表明SID-2是SID-2.
科学领域:
- 分子生物学分子生物学
- 寄生虫学的寄生虫学
- 基因组学就是基因组学.
背景情况:
- 跨膜蛋白SID-2通过将双链RNA导入肠道细胞来促进C. elegans的环境RNA干扰 (RNAi).
- 环境RNAi对于感知病原体至关重要,在V类寄生虫线虫中没有观察到.
- 之前的研究未能通过使用基于序列的方法在这些寄生虫中识别 * sid-2 * ortologs.
研究的目的:
- 为了识别和描述V类寄生虫线虫中的*sid-2* ortologs.
- 为了研究寄生性线虫SID-2的功能和局部.
- 探索SID-2在线虫中的祖先作用.
主要方法:
- 用基因组合成和基于蛋白质结构的比较来识别*sid-2*的正义词.
- 在来自*Heligmosomoides bakeri*的细胞外囊泡 (EV) 中发现了一种SID-2正体.
- 用GFP标记的*H. bakeri*SID-2在*C. elegans*中表达,以评估本地化和功能.
主要成果:
- 通过比较基因组学和结构分析,在寄生性线虫中确定了*sid-2* ortologs.
- 被GFP标记的*H. bakeri*SID-2定位在肠道的顶膜上,并出现在*C. elegans*的囊泡状结构中.
- *H. bakeri* SID-2在一个*C. elegans* SID-2无突变体中没有功能补充环境RNAi.
结论:
- SID-2 是线虫外细胞囊泡中非常丰富的蛋白质.
- SID-2 的祖先功能可能与细胞外囊泡有关,而不是环境RNAi.
- 这一发现为线虫中SID-2的演变和功能提供了新的见解.
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