MAM: more than just a housekeeper.

MAM: more than just a housekeeper.
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DOI:
10.1016/j.tcb.2008.12.002
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发表时间:
2009-02
影响因子:
19
通讯作者:
Su, Tsung-Ping
Su, Tsung-Ping
中科院分区:
生物学1区
文献类型:
--
作者:
Hayashi, Teruo;Rizzuto, Rosario;Hajnoczky, Gyorgy;Su, Tsung-Ping

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内质网(ER)和线粒体之间的物理联系被称为线粒体相关ER膜(MAM),在包括磷脂非囊泡运输在内的各种细胞管家功能中发挥着重要作用。最近发现,MAM还可以高效地将钙离子从内质网传递到线粒体,以刺激氧化代谢,反过来,也可能使代谢活跃的线粒体调节内质网钙离子的动态平衡。最近的研究已经阐明了分子伴侣,如钙粘蛋白、钙网蛋白、ERp44、ERp57、grp75和MAM上的sigma-1受体,它们调节着两个细胞器之间的联系。因此,MAM将信号转导与代谢途径结合起来,调节内质网和线粒体之间的通讯和功能相互作用。
The physical association between the endoplasmic reticulum (ER) and mitochondria, which is known as the mitochondria-associated ER membrane (MAM), has important roles in various cellular ‘housekeeping’ functions including the non-vesicular transports of phospholipids. It has recently become clear that the MAM also enables highly efficient transmission of Ca2+ from the ER to mitochondria to stimulate oxidative metabolism and, conversely, might enable the metabolically energized mitochondria to regulate the ER Ca2+ homeostasis. Recent studies have shed light on molecular chaperones such as calnexin, calreticulin, ERp44, ERp57, grp75 and the sigma-1 receptor at the MAM, which regulate the association between the two organelles. The MAM thus integrates signal transduction with metabolic pathways to regulate the communication and functional interactions between the ER and mitochondrion.
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