Protein Dna Complex
Protein Dna Complex - Related Videos
05:13
Isolation of Proteins from Viral DNA-protein Complexes
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2026
Source: Dembowski, J. A., et al. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017).This video demonstrates the isolation of protein–viral DNA complexes from cell nuclei using click chemistry and magnetic bead purification. The protocol involves labeling viral genomes with alkyne-modified nucleotides, biotinylation via a click reaction, and binding to streptavidin-coated magnetic beads. Following washing and heat elution, the purified...
02:55
Immunoprecipitation of Target Protein-DNA Complexes from Motor Neuron Lysate
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2025
This video demonstrates the immunoprecipitation of DNA fragments crosslinked with target protein from stem cell-derived motor neuron lysates using target protein-specific antibody-coated magnetic beads.
08:30
Visualization of Recombinant DNA and Protein Complexes Using Atomic Force Microscopy
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Cited by 6 •
2011
A tapping mode atomic force microscope (AFM) method for the visualization of plasmid DNA, cytoplasmic proteins, and DNA-protein complexes is described. The method includes alternate approaches for preparing samples for AFM imaging following biochemical manipulation. DNA containing specific protein interacting regions are observed in near-physiologic buffer conditions.
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.
03:06
From DNA to Protein
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2020
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
FAQs
Electrostatic attraction helps initiate and stabilize association between DNA and proteins. Positively charged amino acids interact with the negatively charged phosphate backbone, providing a general binding contribution that does not by itself identify one exact sequence. Additional molecular contacts are therefore important when a protein must recognize a particular DNA site or perform a specialized biological function.
Sequence specificity depends on contacts between the protein and chemical features of DNA bases, including hydrogen bonds formed in the major groove. These interactions help a protein recognize particular sites rather than bind DNA uniformly. Recognition can also alter DNA shape, so protein binding may depend on both base information and the three-dimensional configuration of the DNA.
Binding can change DNA shape as well as connect a protein to the molecule. That structural change can influence how genetic information is organized or accessed during processes such as transcription, replication, recombination, and repair. Consequently, the biological effect of a complex depends not only on whether binding occurs, but also on how the assembly modifies DNA structure.
Researchers investigate these assemblies with biochemical assays, structural methods, and computational analysis. Using complementary approaches helps connect molecular interactions with the arrangement and behavior of the complex. Together, these methods support explanations of how proteins recognize DNA, how binding changes DNA, and how those changes relate to genetic information handling.
Analysis of protein-DNA complexes can clarify how molecular binding contributes to gene regulation, DNA replication, recombination, and repair. These studies connect specific interactions and structural changes with broader biological outcomes. In biology research, that connection helps explain how genetic information is controlled, copied, reorganized, and maintained within molecular systems.
Studying these complexes can help identify molecular defects associated with disease by revealing how disrupted protein-DNA interactions affect genetic information. The same knowledge supports biotechnology and therapeutic development, where understanding recognition, binding, and DNA shape changes can guide efforts to investigate or influence biologically important molecular processes.