Dna Structural Studies
Dna Structural Studies - Related Videos
12:05
Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
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Cited by 7 •
2013
Biophysical and biochemical studies of interactions among membrane-embedded protein domains face many technical challenges, the first of which is obtaining appropriate study material. This article describes a protocol for producing and purifying disulfide-stabilized transmembrane peptide complexes that are suitable for structural analysis by solution nuclear magnetic resonance (NMR) and other analytical applications.
10:55
Study of the DNA Damage Checkpoint using Xenopus Egg Extracts
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Cited by 35 •
2012
Xenopus egg extract is a useful model system to investigate the DNA damage checkpoint. This protocol is for the preparation of Xenopus egg extracts and DNA damage checkpoint inducing reagents. These techniques are adaptable to a variety of DNA damaging approaches in the study of the DNA damage checkpoint signaling.
08:00
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
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Cited by 5 •
2017
Semiflexible polymers display unique mechanical properties that are extensively applied by living systems. However, systematic studies on biopolymers are limited since properties such as polymer rigidity are inaccessible. This manuscript describes how this limitation is circumvented by programmable DNA nanotubes, enabling experimental studies on the impact of filament rigidity.
11:27
Studying DNA Looping by Single-Molecule FRET
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Cited by 13 •
2014
This study presents a detailed experimental procedure to measure looping dynamics of double-stranded DNA using single-molecule Fluorescence Resonance Energy Transfer (FRET). The protocol also describes how to extract the looping probability density called the J factor.
09:31
Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites
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Cited by 56 •
2016
We describe a protocol for amplifying retroviral integration sites from the genomic DNA of infected cells, sequencing the amplified virus-host junctions, and then mapping these sequences to a reference genome. We also describe techniques to quantify the distribution of integration sites relative to various genomic annotations using BEDTools.
FAQs
DNA sequence and base pairing help determine its three-dimensional arrangement, while flexibility affects how readily the molecule changes conformation. Structural studies connect these properties to molecular behavior rather than treating DNA as a rigid information carrier. This relationship helps explain how particular sequences present recognizable surfaces or adopt shapes relevant to replication, repair, and regulation.
Shape and conformation control which molecular surfaces DNA presents to proteins and ligands. A structural change can therefore alter how these partners recognize, bind, or influence the molecule. Examining such interactions provides a molecular explanation for DNA regulation and for the effects of compounds designed to target particular DNA features.
These methods provide complementary ways to determine DNA structures at atomic or near-atomic resolution. X-ray crystallography, nuclear magnetic resonance spectroscopy, and cryo-electron microscopy can reveal organization and molecular interactions from different experimental perspectives. Comparing their structural evidence strengthens interpretation of DNA conformation and supports links between observed architecture and biological function.
Structural measurements show molecular organization, whereas biochemical and computational analyses help relate that organization to sequence, base pairing, flexibility, and behavior. Combining these approaches connects a three-dimensional model with functional consequences. The resulting interpretation can clarify how DNA interacts with partners and how structural features contribute to genome activity.
A study can begin by examining DNA organization and molecular interactions with a structural method, then use biochemical or computational analyses to relate the observed features to sequence, base pairing, and flexibility. Researchers interpret the resulting structure in the context of replication, repair, regulation, or other genome functions to determine its biological significance.
These studies reveal how disease-associated changes may alter DNA shape, flexibility, or molecular interactions. That structural information provides a basis for connecting molecular changes with genome function and for designing targeted therapeutics. The approach is useful when researchers need to understand not only where a change occurs, but also how it could influence DNA behavior.