Article ; Online: Dynamics of nuclear export of pre-ribosomal subunits revealed by high-speed single-molecule microscopy in live cells.
iScience
2023 Volume 26, Issue 8, Page(s) 107445
Abstract: We present a study on the nuclear export efficiency and time of pre-ribosomal subunits in live mammalian cells, using high-speed single-molecule tracking and single-molecule fluorescence resonance energy transfer techniques. Our findings reveal that pre- ... ...
Abstract | We present a study on the nuclear export efficiency and time of pre-ribosomal subunits in live mammalian cells, using high-speed single-molecule tracking and single-molecule fluorescence resonance energy transfer techniques. Our findings reveal that pre-ribosomal particles exhibit significantly higher nuclear export efficiency compared to other large cargos like mRNAs, with around two-thirds of interactions between the pre-60S or pre-40S and the nuclear pore complexes (NPCs) resulting in successful export to the cytoplasm. We also demonstrate that nuclear transport receptor (NTR) chromosomal maintenance 1 (CRM1) plays a crucial role in nuclear export efficiency, with pre-60S and pre-40S particle export efficiency decreasing by 11-17-fold when CRM1 is inhibited. Our results suggest that multiple copies of CRM1 work cooperatively to chaperone pre-ribosomal subunits through the NPC, thus increasing export efficiency and decreasing export time. Significantly, this cooperative NTR mechanism extends beyond pre-ribosomal subunits, as evidenced by the enhanced nucleocytoplasmic transport of proteins. |
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Language | English |
Publishing date | 2023-07-21 |
Publishing country | United States |
Document type | Journal Article |
ISSN | 2589-0042 |
ISSN (online) | 2589-0042 |
DOI | 10.1016/j.isci.2023.107445 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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