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ATAD3 proteins: brokers of a mitochondria-endoplasmic reticulum connection in mammalian cells
Biological Reviews ( IF 11.0 ) Pub Date : 2017-09-20 , DOI: 10.1111/brv.12373
Jacques Baudier 1, 2
Affiliation  

In yeast, a sequence of physical and genetic interactions termed the endoplasmic reticulum (ER)–mitochondria organizing network (ERMIONE) controls mitochondria–ER interactions and mitochondrial biogenesis. Several functions that characterize ERMIONE complexes are conserved in mammalian cells, suggesting that a similar tethering complex must exist in metazoans. Recent studies have identified a new family of nuclear‐encoded ATPases associated with diverse cellular activities (AAA+‐ATPase) mitochondrial membrane proteins specific to multicellular eukaryotes, called the ATPase family AAA domain‐containing protein 3 (ATAD3) proteins (ATAD3A and ATAD3B). These proteins are crucial for normal mitochondrial–ER interactions and lie at the heart of processes underlying mitochondrial biogenesis. ATAD3A orthologues have been studied in flies, worms, and mammals, highlighting the widespread importance of this gene during embryonic development and in adulthood. ATAD3A is a downstream effector of target of rapamycin (TOR) signalling in Drosophila and exhibits typical features of proteins from the ERMIONE‐like complex in metazoans. In humans, mutations in the ATAD3A gene represent a new link between altered mitochondrial–ER interaction and recognizable neurological syndromes. The primate‐specific ATAD3B protein is a biomarker of pluripotent embryonic stem cells. Through negative regulation of ATAD3A function, ATAD3B supports mitochondrial stemness properties.

中文翻译:

ATAD3 蛋白:哺乳动物细胞中线粒体-内质网连接的中介

在酵母中,一系列物理和遗传相互作用被称为内质网(ER)-线粒体组织网络(ERMIONE)控制线粒体-ER相互作用和线粒体生物发生。表征 ERMIONE 复合物的几个功能在哺乳动物细胞中是保守的,这表明后生动物中必须存在类似的束缚复合物。最近的研究确定了一个新的核编码 ATP 酶家族,与多种细胞活动(AAA+-ATPase)相关,是多细胞真核生物特有的线粒体膜蛋白,称为 ATPase 家族 AAA 结构域蛋白 3(ATAD3)蛋白(ATAD3A 和 ATAD3B)。这些蛋白质对于正常的线粒体-ER 相互作用至关重要,并且是线粒体生物发生过程的核心。ATAD3A 直向同源物已在苍蝇、蠕虫、和哺乳动物,突出了该基因在胚胎发育和成年期的广泛重要性。ATAD3A 是果蝇中雷帕霉素 (TOR) 信号靶标的下游效应器,并表现出来自后生动物 ERMIONE 样复合物的蛋白质的典型特征。在人类中,ATAD3A 基因的突变代表了线粒体-ER 相互作用改变与可识别的神经系统综合征之间的新联系。灵长类动物特异性 ATAD3B 蛋白是多能胚胎干细胞的生物标志物。通过对 ATAD3A 功能的负调节,ATAD3B 支持线粒体干性特性。ATAD3A 是果蝇中雷帕霉素 (TOR) 信号靶标的下游效应器,并表现出来自后生动物 ERMIONE 样复合物的蛋白质的典型特征。在人类中,ATAD3A 基因的突变代表了线粒体-ER 相互作用改变与可识别的神经系统综合征之间的新联系。灵长类动物特异性 ATAD3B 蛋白是多能胚胎干细胞的生物标志物。通过对 ATAD3A 功能的负调节,ATAD3B 支持线粒体干性特性。ATAD3A 是果蝇中雷帕霉素 (TOR) 信号靶标的下游效应器,并表现出来自后生动物 ERMIONE 样复合物的蛋白质的典型特征。在人类中,ATAD3A 基因的突变代表了线粒体-ER 相互作用改变与可识别的神经系统综合征之间的新联系。灵长类动物特异性 ATAD3B 蛋白是多能胚胎干细胞的生物标志物。通过对 ATAD3A 功能的负调节,ATAD3B 支持线粒体干性特性。
更新日期:2017-09-20
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