极端的线粒体缩小在一个新型的自由生活的元粒体的小组
Shelby K Williams1,2, Jon Jerlström Hultqvist1,3, Yana Eglit1,4
1Institute for Comparative Genomics, Dalhousie University, Halifax, NS, Canada.
Nature communications
|August 9, 2024
概括
称为甲基的自由活体无氧原生体显示线粒体相关器官 (MROs) 的极度减少. 一种物种,Skoliomonas litria,已经完全失去其MROs,表明完全的线粒体损失是可能在自由生活的生物体.
科学领域:
- * 微生物学和进化生物学
- * 对微生物真核生物和有机细胞进化的研究.
背景情况:
- * 甲基是异质性真核生物,在低氧条件下壮成长.
- *大多数甲基都具有与线粒体相关的有机细胞 (MROs),其功能减少程度各不相同.
- *了解MRO减少提供了对器官细胞进化和适应的洞察力.
研究的目的:
- * 为了研究新发现的自由生活的甲基的基因组和MROs.
- * 确定这些生物体的遗传学位置.
- * 分析MRO减少的程度和相关的遗传机制.
主要方法:
- *生成高质量的基因组,转录组和蛋白质组草案.
- * 遗传学分析以建立进化关系.
- *对基因模型的生物信息分析来预测MRO蛋白质组.
主要成果:
- *发现了"BaSk" (Barthelonids+Skoliomonads) 类,这是Fornicata的一个姐妹群.
- *与其他自由生活的甲基相比,在BaSk生物体中识别了极度减少的MRO蛋白质.
- * 铁硫集群路径的横向基因转移的证据.
- * 在Skoliomonas litria中观察到完全的MRO损失,其MRO蛋白质组没有被赋予蛋白质.
结论:
- * BaSk 类代表了具有高度降低 MRO 的金属中显著的血统.
- * 在自由生存的无氧原生体中,MROs的完全丧失可能发生.
- * 这一发现扩大了我们对真核细胞中线粒体功能减少和器官细胞损失的理解.
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