Chromatin Interactions
Chromatin Interactions - Related Videos
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Chromatin Interaction Analysis with Paired-End Tag Sequencing (ChIA-PET) for Mapping Chromatin Interactions and Understanding Transcription Regulation
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Cited by 17 •
2012
Chromatin Interaction Analysis by Paired-End Tag Sequencing (ChIA-PET) is a method for de novo detection of chromatin interactions, for better understanding of transcriptional control.
06:29
Chromatin Immunoprecipitation Assay: A Technique to Study Protein-DNA Interactions in Cells
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2023
This video describes protocol for chromatin immunoprecipitation (ChIP) assay, which is a classic technique to demonstrate protein-DNA interactions.This technique is used to identify target genes in human chronic lymphocytic leukemia cells.
12:36
Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo
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Cited by 22 •
2016
Chromatin immunoprecipitation is a powerful technique for the identification of DNA binding sites of Arabidopsis proteins in vivo. This procedure includes chromatin cross-linking and fragmentation, immunoprecipitation with selective antibodies against the protein of interest, and qPCR analysis of bound DNA. We describe a simple ChIP assay optimized for Arabidopsis plants.
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Chromatin Immunoprecipitation
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2023
Histones are proteins that help organize DNA in eukaryotic nuclei by serving as “scaffolds” around which DNA can be wrapped, forming a complex called “chromatin”. These proteins can be modified through the addition of chemical groups, and these changes affect gene expression. Researchers use a technique called chromatin immunoprecipitation (ChIP) to better understand which DNA regions associate with specific histone modifications or other gene regulatory proteins. Antibodies are used to isolate...
10:05
Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC (Crosslinking of Small Molecules to Isolate Chromatin)
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Cited by 5 •
2016
Identifying the direct targets of genome-targeting molecules remains a major challenge. To understand how DNA-binding molecules engage the genome, we developed a method that relies on crosslinking of small molecules to isolate chromatin (COSMIC).
FAQs
Cohesin-mediated extrusion helps organize chromatin into loops, bringing selected genomic regions into proximity. CTCF and related boundary-forming proteins help insulate neighboring regions, limiting inappropriate contacts between regulatory elements and genes. Together, these mechanisms create an interaction framework in which enhancers can reach suitable promoters while other genomic domains remain separated.
Chromatin loops can bring an enhancer into contact with a gene promoter even when the two regions are distant along the DNA sequence. This spatial arrangement helps connect regulatory elements with their target genes and influences whether genetic information is used. Insulation is equally important because it restricts regulatory effects from spreading to neighboring genes.
Disrupted contacts can change which promoters receive regulatory input or weaken boundaries that normally keep genomic regions separate. Such changes may alter transcription and cellular identity, even when the affected DNA does not directly encode a protein. In genetics, these disruptions help explain how structural variants and regulatory abnormalities contribute to developmental disorders, cancer, and other genetic diseases.
Interaction maps provide evidence about the three-dimensional relationships among genomic regions, including potential links between distant enhancers and target promoters. This information adds regulatory and structural context to the DNA sequence, helping researchers interpret how genome architecture influences transcription, replication, and cellular identity rather than examining genetic elements only as a linear sequence.
Researchers map physical contacts across the genome and examine which regulatory regions repeatedly occur near particular promoters or genomic domains. These relationships can suggest candidate enhancer-target gene connections and identify insulated regions. Interpreting the maps alongside genetic features helps clarify how genome organization contributes to gene regulation and supports investigation of altered regulatory architecture.
Disease-associated structural variants or regulatory disruptions may alter loops, boundaries, or contacts between regulatory elements and promoters. Studying these changes can connect a genomic alteration with abnormal transcription or disrupted cellular identity. This approach is especially relevant to understanding developmental disorders, cancer, and other genetic diseases in which altered genome architecture contributes to the phenotype.