Golgi-derived vesicles containing PI(3,4)P2 drive mitochondrial fusion · S. Aki et al.
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日本与英国等机构的研究者发现,由II类磷脂酰肌醇3-激酶(PI3K-C2α/β)将PI(4)P转化为PI(3,4)P2后形成的高尔基体来源囊泡,会被招募到由内质网和线粒体外膜融合蛋白MFN1/2标记的线粒体融合位点,促进外膜融合。缺失PI3K-C2α/β会使线粒体因融合受阻而碎片化,而外源PI(3,4)P2可在体外直接促进融合。在心肌细胞特异性双敲除小鼠中,这一缺失导致线粒体碎片化和严重心脏缺陷、早期死亡,提示II类PI3K对心脏功能至关重要。
原文开头
Golgi- derived vesicles containing PI(3,4)P2 drive mitochondrial fusion Sho Aki† and Mayuko Segawa† et al. INTRODUCTION: Mitochondria are double- membrane–bound organelles that generate adenosine triphosphate (ATP) and form a dynamic network remodeled by cycles of fusion and fission. These shape transitions are essential for organelle function, metabolic adaptation, mitochondrial quality control, and cell fate, and defects in these processes are associated with human disease. Although the functions of the core guanosine triphosphatases (GTPases) that drive mitochondrial dynamics are well established, these processes are now recognized to be coordinated by other organelles and regulated by local lipid signaling. However, beyond the endoplasmic reticulum (ER), whether and how other organelles, in particular, Golgi- derived vesicles, regulate mitochondrial fusion remain understudied. …
摘自《科学》(Science)2026年10月8日,S. Aki et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。