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Updated: Jun 25, 2026
11:06
Chromatin Immunoprecipitation (ChIP) of Histone Modifications from Saccharomyces cerevisiae
Published on: December 29, 2017
Intergenic locations of rice centromeric chromatin
Huihuang Yan1, Paul B Talbert, Hye-Ran Lee
1Department of Horticulture, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Plos Biology
|December 11, 2008
Summary
Rice centromeres, unlike most plant and animal centromeres, are embedded in non-satellite DNA. This study mapped rice centromere boundaries and found gene-poor regions, supporting evolution from such areas.
Area of Science:
- Genetics
- Molecular Biology
- Epigenetics
Background:
- Centromeres are crucial for chromosome segregation during cell division.
- Plant and animal centromeres often reside in large, difficult-to-map satellite repeat arrays.
- Rice centromeres offer a unique model due to their non-satellite DNA composition.
Purpose of the Study:
- To define the boundaries of rice centromeres.
- To investigate the structure and evolution of centromeres in rice.
- To identify subdomains within centromeres bound by CENH3.
Main Methods:
- Chromatin immunoprecipitation (ChIP) to isolate centromeric DNA.
- 454 sequencing to identify DNA sequences at centromere boundaries.
- Analysis of gene distribution and synteny in centromeric regions.
Main Results:
- Mapped boundaries for nine out of 12 rice centromeres.
- Identified shared synteny between centromeres on chromosomes 8 and 9, suggesting ancient duplication.
- Discovered discrete CENH3-binding subdomains depleted of genes within four centromeres.
Conclusions:
- Rice centromeres are primarily located in gene-poor, intergenic regions.
- This arrangement supports a model where centromeres evolve from non-coding DNA.
- Findings provide insights into centromere evolution and structure in plants.
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