How Spindle Pole Bodies Help Fission Yeast Divide
Author Information
Author(s): Zheng Liling, Schwartz Cindi, Magidson Valentin, Khodjakov Alexey, Oliferenko Snezhana
Primary Institution: Temasek Life Sciences Laboratory, Singapore
Hypothesis
The spindle pole bodies (SPBs) prevent deformation of the nuclear envelope (NE) during spindle elongation, facilitating nuclear division during closed mitosis in fission yeast.
Conclusion
The study shows that spindle pole bodies are essential for proper nuclear envelope division and chromosome segregation during closed mitosis in fission yeast.
Supporting Evidence
- Cells overexpressing Mia1p failed to separate spindle pole bodies and often arrested in anaphase with nonsegregated chromosomes.
- When spindle pole bodies were severed, the nuclear envelope deformed, leading to division failure.
- Dis1Δ cells showed that spindle pole bodies are required for maintaining nuclear shape during anaphase.
Takeaway
Spindle pole bodies help fission yeast cells divide by keeping the nuclear envelope from getting squished during the process.
Methodology
The study involved overexpressing the Mia1p protein in fission yeast and observing the effects on spindle and nuclear envelope dynamics through microscopy and laser microsurgery.
Limitations
The study primarily focuses on fission yeast, which may limit the generalizability of the findings to other organisms.
Digital Object Identifier (DOI)
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