通过细菌-虫域间水平基因转移获得的应激弹性
Taruna Pandey1, Chinmay A Kalluraya2, Bingying Wang1
1Cardiovascular Research Institute and Department of Physiology, University of California San Francisco, San Francisco, CA, USA.
The EMBO journal
|November 13, 2023
概括
一种线虫基因rml-3,通过域间水平基因转移 (iHGT) 从细菌中获取,可以增强外骨的弹性. 这种细菌基因使L-rhamnose生物合成成为可能,这对于保护Caenorhabditis elegans免受环境毒素的影响至关重要.
科学领域:
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
- 生物化学 生物化学
背景情况:
- 自然选择驱动着生物体弹性特征的演变.
- 横向基因转移 (HGT),特别是来自细菌的域间HGT (iHGT),有助于甲基动物获得新特性.
- 线虫基因rml-3正在研究其在生物弹性中的作用.
研究的目的:
- 研究线虫基因rml-3的起源和功能.
- 为了确定rml-3是否通过细菌通过iHGT获得.
- 为了阐明rml-3在外骨弹性和对Caenorhabditis elegans环境毒素的保护中的作用.
主要方法:
- 线虫RML-3蛋白质和细菌酶的遗传学分析.
- 在发育和压力期间对C. elegans rml-3的基因表达分析.
- 对rml-3缺陷突变体的表型分析和使用L-rhamnose的救援实验.
主要成果:
- 线虫RML-3蛋白质形成了一个类似于细菌L-rhamnose生物合成酶的类.
- C. elegans rml-3 在压力和持续阶段被上调.
- 缺少rml-3会损害皮质完整性和应激弹性,而L-rhamnose则可以挽救这种情况.
结论:
- 线虫基因rml-3是通过iHGT从细菌中获得的,使得L-rhamnose生物合成.
- 这种获取促进了线虫的皮质完整性和生物体对环境压力因素的弹性.
- 通过化细菌基因,iHGT在元动物进化中发挥了重要作用.
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