Protein Dna Sliding
Protein Dna Sliding - Related Videos
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...
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...
08:51
Visualization of Surface-tethered Large DNA Molecules with a Fluorescent Protein DNA Binding Peptide
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Cited by 7 •
2016
We present an approach for visualizing fluorescent protein DNA binding peptide (FP-DBP)-stained large DNA molecules tethered on the polyethylene glycol (PEG) and avidin-coated glass surface and stretched with microfluidic shear flows.
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.
08:53
Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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2025
Enrichment and sequencing of protein-associated nascent DNA (eSPAN) was developed to detect the relative abundance of a chromatin-associated protein on two replicating DNA strands, thereby revealing molecular insight into chromatin replication and its coupled processes. This protocol describes eSPAN procedures in yeast and mouse embryonic stem (ES) cells.
FAQs
The negatively charged phosphate backbone provides the electrostatic surface that supports a protein’s initial nonspecific attachment to DNA. Because the protein maintains contact with this backbone while moving, it can diffuse along the DNA rather than repeatedly searching for a target from solution. This continuous contact contributes to efficient sequence recognition.
Sliding keeps the DNA-binding protein associated with the same DNA molecule as it moves along the helix. Dissociation and rebinding instead separate these events, allowing the protein to attach again elsewhere. The overview describes these behaviors as alternating search modes, so target recognition depends on movement along DNA as well as changes in association.
Alternating between one-dimensional movement, dissociation, and rebinding gives DNA-binding proteins multiple ways to search for specific nucleotide sequences. Sliding supports movement while contact is retained, whereas the other behaviors change where searching can resume. Together, these dynamics help explain how proteins locate targets efficiently on long DNA molecules.
Studying this movement helps researchers explain how molecular machines search long DNA molecules for particular sequences. It also provides a framework for examining how binding dynamics influence the timing and efficiency of target recognition. In biology, these insights connect molecular movement with broader processes such as gene regulation and genome maintenance.
The mechanism is relevant to transcription factors, restriction enzymes, and DNA-repair proteins. Although these proteins perform different biological roles, each must locate particular nucleotide sequences or DNA features. Examining their movement along DNA helps researchers relate a shared search strategy to transcriptional control, restriction activity, and the maintenance of genome integrity.
Changes in the way a DNA-binding protein attaches, moves, dissociates, or rebinds can alter how efficiently it finds its target. Because transcription factors, restriction enzymes, and DNA-repair proteins depend on sequence recognition, altered search dynamics may influence gene regulation or genome maintenance. Protein-DNA sliding therefore links molecular behavior with cellular outcomes.