Protein-dna Interactions
Protein-dna Interactions - Related Videos
04:38
The Circular Dichroism Spectroscopy Technique to Study DNA-Protein Interactions
0 Views •
2025
This video demonstrates the circular dichroism (CD) spectroscopy technique to study conformational changes occurring in DNA in the presence of ATP-dependent chromatin remodeling protein. The changes in the CD spectra measured in the presence and absence of ATP hydrolysis indicate the importance of ATP in the ability of the remodeler to induce conformational changes in the bound DNA.
05:42
Immunofluorescence-Based Visualization of DNA Repair Protein Interactions
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2025
In this video, we describe the immunofluorescence method to visualize the localization of the DNA repair proteins γH2AX and 53BP1 at the sites of double-strand DNA breaks in irradiated cell nuclei.
14:43
Combining Single-molecule Manipulation and Imaging for the Study of Protein-DNA Interactions
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Cited by 10 •
2014
Here we describe the instrumentation and methods for detecting single fluorescently-labeled protein molecules interacting with a single DNA molecule suspended between two optically trapped microspheres.
10:47
A Modified Yeast-one Hybrid System for Heteromeric Protein Complex-DNA Interaction Studies
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Cited by 2 •
2017
The modified yeast one-hybrid assay described here is an extension of the classical yeast one-hybrid (Y1H) assay to study and validate the heteromeric protein complex-DNA interaction in a heterologous system for any functional genomics study.
06:48
CD Spectroscopy to Study DNA-Protein Interactions
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Cited by 2 •
2022
The interaction of an ATP-dependent chromatin remodeler with a DNA ligand is described using CD spectroscopy. The induced conformational changes on a gene promoter analyzed by the peaks generated can be used to understand the mechanism of transcriptional regulation.
FAQs
Recognition depends on several complementary features rather than a single bond. Proteins can sense particular DNA sequences or structural features through electrostatic attraction, hydrogen bonding, and matching molecular surfaces. This combination allows a protein to distinguish potential binding regions and helps determine where regulatory, replication, or repair-related activities occur within the genome.
Binding can alter DNA geometry by bending the molecule, which may change how nearby regions are positioned relative to one another. The altered structure can also support recruitment of additional regulatory factors. Consequently, the initial interaction may influence a larger molecular assembly, affecting how genetic information is expressed or managed.
Some proteins recognize particular DNA sequences, whereas others respond to structural features of the DNA molecule. These mechanisms provide complementary ways to identify functional genomic regions. Their distinction matters because a binding event may reflect either the underlying nucleotide arrangement or the physical shape of the DNA, helping explain why proteins associate with selected sites.
Researchers commonly use electrophoretic mobility shift assays, footprinting, and chromatin immunoprecipitation. These approaches provide different evidence about binding: together, they can help identify whether an association occurs, locate protected or occupied DNA regions, and connect proteins with binding sites in cellular chromatin. The resulting data support analysis of regulatory networks.
Footprinting can help identify DNA regions associated with protein protection or occupancy, while chromatin immunoprecipitation examines protein-associated regions in chromatin. Applied together with other binding assays, these methods help map regulatory sites and relate them to gene-control networks. This information can clarify how particular proteins participate in genetic regulation.
Their importance extends across transcription, chromatin organization, DNA replication, and DNA repair. Changes in binding sites or regulatory associations can therefore help explain genetic variation and disease mechanisms. Studying these interactions also provides a basis for considering targeted genomic intervention, because researchers can connect molecular binding behavior with broader changes in genome function.