Visualizing the high curvature regions of post-mitotic nascent nuclear envelope membrane
We previously reported that mitotic endoplasmic reticulum (ER) membrane cisternae or sheets directly assemble mammalian nuclear envelope (NE) at the end of mitosis. In this study, we investigated the dynamics of the high curvature regions of partially assembled nuclear envelope membrane using reti...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/96720 http://hdl.handle.net/10220/13053 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3291306/ |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | We previously reported that mitotic endoplasmic reticulum (ER) membrane cisternae or sheets directly assemble
mammalian nuclear envelope (NE) at the end of mitosis. In this study, we investigated the dynamics of the high curvature
regions of partially assembled nuclear envelope membrane using reticulon4a as a probe. We found that, after sorting out
reticulon4a from the nascent NE membrane sheets, reticulon4a is specifically localized to the leading edges. Our 3D time
lapse images suggested that ER tubules could be incompetent in assembling the NE membrane. Our findings suggest a
possible role of reticulons at the leading edges during the NE re-assembly and provide further evidences that the mitotic
assembly of NE is by ER cisternae rather than tubules. |
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