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Chromatin Extraction from Frozen Chimeric Liver Tissue for Chromatin Immunoprecipitation Analysis
Published on: March 23, 2021
DNA mediated chromatin pull-down for the study of chromatin replication
Anna E Kliszczak1, Michael D Rainey, Brendan Harhen
1National Centre of Biomedical Engineering and Science, National University of Ireland Galway, Galway, Ireland.
Scientific Reports
|February 23, 2012
Summary
Researchers developed a new method to study how proteins attach to DNA during replication. This technique helps understand genome stability and cell identity preservation.
Area of Science:
- Molecular Biology
- Epigenetics
- Genomics
Background:
- Chromatin replication is essential for duplicating DNA and maintaining epigenetic information.
- This process is crucial for genome stability and cell-type identity.
- Understanding how chromatin is reassembled after DNA replication is a key challenge.
Purpose of the Study:
- To develop a novel experimental approach for analyzing chromatin content after DNA replication.
- To investigate the relationship between chromatin protein composition and the timing of DNA replication in human cells.
Main Methods:
- A simple experimental technique to capture and analyze chromatin after in vivo DNA replication and labeling.
- Analysis of bound proteins using immunological techniques and large-scale mass spectrometry.
Main Results:
- The developed technique is highly specific for analyzing proteins bound to replicated DNA.
- Proof-of-concept demonstrates the utility of the method for investigating chromatin dynamics during replication.
Conclusions:
- This novel procedure provides a powerful tool for studying chromatin assembly on newly replicated DNA.
- It facilitates understanding the coupling of chromatin maturation with DNA synthesis and replication timing.
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02:36Chromatin Immunoprecipitation- ChIP
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
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The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
02:31Chromosome Replication
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin of...