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Updated: Jun 3, 2026
14:49
Associated Chromosome Trap for Identifying Long-range DNA Interactions
Published on: April 23, 2011
DDA3 associates with MCAK and controls chromosome congression
Chang-Young Jang1, Guowei Fang
1School of Pharmacy, Sookmyung Women's University, Seoul 140-742, Republic of Korea. cyjang@sookmyung.ac.kr
Biochemical and Biophysical Research Communications
|March 24, 2011
Summary
DDA3 protein is crucial for proper chromosome movement during cell division by regulating microtubule dynamics. Its depletion leads to chromosome misalignment, involving MCAK and CENP-E in this process.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- DDA3 protein regulates spindle microtubule (MT) dynamics and chromosome movement in mitosis.
- Depletion of DDA3 results in hyper-stabilized spindle MT, loss of inter-kinetochore tension, and defective chromosome congression, leading to metaphase chromosome misalignment.
Purpose of the Study:
- To investigate the role of DDA3 in kinetochore function and chromosome congression.
- To identify other proteins involved in DDA3-mediated chromosome alignment.
Main Methods:
- Depletion of DDA3 protein in mitotic cells.
- Immunofluorescence microscopy to assess protein localization.
- Analysis of spindle MT dynamics and chromosome alignment.
Main Results:
- DDA3 is localized at kinetochores and interacts with MCAK.
- CENP-E accumulates at kinetochores in DDA3-depleted cells with unaligned chromosomes.
- Localization and activity of the chromosomal passenger complex (CPC) and Aurora B kinase remain normal in DDA3-depleted cells.
Conclusions:
- DDA3 plays a role in kinetochore-MT attachments and chromosome congression.
- MCAK and CENP-E are identified as key players in DDA3-mediated chromosome alignment during mitosis.
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