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Nuclear envelope budding and its cellular functions

機(jī)譯：核包膜出芽及其細(xì)胞功能

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The nuclear pore complex (NPC) has long been assumed to be the sole route across the nuclear envelope, and under normal homeostatic conditions it is indeed the main mechanism of nucleo-cytoplasmic transport. However, it has also been known that e.g. herpesviruses cross the nuclear envelope utilizing a pathway entitled nuclear egress or envelopment/de-envelopment. Despite this, a thread of observations suggests that mechanisms similar to viral egress may be transiently used also in healthy cells. It has since been proposed that mechanisms like nuclear envelope budding (NEB) can facilitate the transport of RNA granules, aggregated proteins, inner nuclear membrane proteins, and mis-assembled NPCs. Herein, we will summarize the known roles of NEB as a physiological and intrinsic cellular feature and highlight the many unanswered questions surrounding these intriguing nuclear events.
機(jī)譯：長(zhǎng)期以來(lái)，核孔復(fù)合體 （NPC） 一直被認(rèn)為是穿過(guò)核膜的唯一途徑，在正常的穩(wěn)態(tài)條件下，它確實(shí)是核質(zhì)運(yùn)輸?shù)闹饕獧C(jī)制。然而，眾所周知，例如皰疹病毒利用一種稱為核出口或包膜/解包絡(luò)的途徑穿過(guò)核膜。盡管如此，一系列觀察表明，類(lèi)似于病毒出口的機(jī)制也可能在健康細(xì)胞中瞬時(shí)使用。此后有人提出，核膜出芽 （NEB） 等機(jī)制可以促進(jìn) RNA 顆粒、聚集蛋白、核內(nèi)膜蛋白和錯(cuò)誤組裝的 NPC 的運(yùn)輸。在本文中，我們將總結(jié) NEB 作為生理和內(nèi)在細(xì)胞特征的已知作用，并強(qiáng)調(diào)圍繞這些有趣的核事件的許多未解之謎。

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