Binding Site Cassette
Binding Site Cassette - Related Videos
11:03
Pouring and Running a Protein Gel by reusing Commercial Cassettes
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Cited by 2 •
2012
Our protocol demonstrates how to pour multiple protein gels at a time by recycling Invitrogen Nupage Novex minigel cassettes, and inexpensive materials purchased at a home improvement store. This economical and streamlined method includes a way to store the gels at 4°C for a few weeks. By re-using the plastic gel cassettes from commercially available gels, labs that run frequent protein gels can save significant costs and help the environment.
09:37
Screening Foodstuffs for Class 1 Integrons and Gene Cassettes
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Cited by 13 •
2015
This protocol describes the detection of class 1 integrons and their associated gene cassettes in foodstuffs.
02:18
The Equilibrium Binding Constant and Binding Strength
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2020
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium: where P and L are the unbound protein and ligand, respectively, and PL is the protein-ligand complex. As the amount of bound ligand is also related to the rate of ligand binding, experiments can also determine Kb by examining the rates of protein-ligand association (kon) and dissociation (koff) using the following ratio: Thus,...
03:36
Generating Gene Deletions in E. coli via Phage-Mediated Transfer of an Excisable Antibiotic Cassette
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2026
Source: Saragliadis, A., et al. Producing Gene Deletions in Escherichia coli by P1 Transduction with Excisable Antibiotic Resistance Cassettes. J. Vis. Exp. (2018)This video demonstrates the phage-mediated transfer of donor DNA carrying an excisable antibiotic resistance cassette into Escherichia coli. The integrated cassette replaces the target gene via homologous recombination, resulting in a stable gene deletion.
08:21
Site-specific Bacterial Chromosome Engineering: ΦC31 Integrase Mediated Cassette Exchange (IMCE)
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Cited by 11 •
2012
A quick and efficient method to integrate foreign DNA of interest into pre-made acceptor strains, termed landing pad strains, is described. The method allows site-specific integration of a DNA cassette into the engineered landing pad locus of a given strain, through conjugation and expression of the ΦC31 integrase.
FAQs
These design variables determine how many regulatory proteins can engage the DNA and how their recognition sites are arranged relative to one another and nearby regulatory elements. Comparing cassettes that differ in one variable at a time helps attribute changes in reporter or gene transcription to binding-site architecture rather than to an uncontrolled sequence difference.
Recognition can increase or decrease transcription depending on whether the bound protein recruits regulatory machinery or blocks access to it. This makes the cassette useful for separating sequence-specific recognition from downstream transcriptional consequences: the same experimental framework can examine activation and repression by monitoring how altered binding-site designs change gene activity.
Spacing places the defined sites in a reproducible relationship to one another and to a promoter or reporter gene. That control allows investigators to ask whether regulatory effects depend on site arrangement, rather than simply on the presence of a binding sequence. The resulting comparisons can reveal interactions between binding events and nearby transcriptional control elements.
Researchers insert a designed cassette near a promoter or reporter gene, then compare versions with selected binding-site sequences or arrangements. The regulatory protein and DNA context are kept defined while transcription is measured under controlled conditions. This workflow links a particular sequence design to regulatory strength and provides a basis for testing promoter or enhancer function.
A focused design includes the engineered DNA segment, a promoter or reporter gene, and the regulatory protein whose binding is being examined. The cassette can be varied in site number, orientation, spacing, or sequence, while the resulting transcriptional output supplies the comparison. Together, these components connect molecular recognition with measurable gene-expression changes.
They are useful when investigators need a defined system for examining promoter and enhancer function or the effect of a DNA-binding protein on transcription. The same strategy also supports synthetic gene circuits, where selected binding sites provide regulatory elements. Because the sequence architecture can be changed deliberately, experiments can test regulatory principles rather than relying only on complex native loci.