Related Experiment Video
Updated: Jun 9, 2025
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Immunofluorescence Analysis of Endogenous and Exogenous Centromere-kinetochore Proteins
Published on: March 3, 2016
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CENP-C-Mis12 complex establishes a regulatory loop through Aurora B for chromosome segregation
Weixia Kong1, Masatoshi Hara2, Yurika Tokunaga3
1Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan.
Life Science Alliance
|October 21, 2024
Summary
A novel regulatory loop between CENP-C and Aurora B kinase ensures correct chromosome attachment. This interaction, mediated by the Mis12 complex, is vital for accurate cell division and preventing mitotic defects.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Faithful chromosome segregation relies on correct kinetochore-microtubule attachment.
- Kinetochores employ regulatory mechanisms for bipolar attachment, but their coupling is unclear.
Purpose of the Study:
- To elucidate the regulatory mechanisms coupling kinetochore-microtubule attachment.
- To investigate the role of CENP-C and Aurora B kinase in error correction.
Main Methods:
- Investigated the regulatory loop between CENP-C and Aurora B kinase.
- Utilized human RPE-1 cells lacking the Mis12C-binding region of CENP-C.
- Assessed mitotic defects and kinetochore-microtubule attachment.
Main Results:
- A regulatory loop between CENP-C and Aurora B kinase was identified, crucial for error correction.
- The CENP-C-Mis12C interaction facilitates Aurora B recruitment and mitotic error correction.
- Aurora B reinforces the CENP-C-Mis12C interaction, creating a positive feedback loop.
Conclusions:
- A positive regulatory loop between Aurora B and the CENP-C-Mis12C interaction ensures chromosome biorientation.
- This mechanism is critical for accurate chromosome segregation and preventing mitotic errors.
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