期刊
NUCLEUS
卷 14, 期 1, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/19491034.2023.2178184
关键词
Nuclear import; nuclear export; nuclear envelope budding
类别
The nuclear pore complex (NPC) is the main mechanism of nucleo-cytoplasmic transport, but viral egress pathway and nuclear envelope budding (NEB) have been observed to be potentially used in healthy cells for transporting various substances. NEB can facilitate the transport of RNA granules, aggregated proteins, inner nuclear membrane proteins, and mis-assembled NPCs. However, there are still many unanswered questions regarding these nuclear events.
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.
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