Tev Protease Cleavage
Tev Protease Cleavage - Related Videos
02:42
A Fluorogenic Peptide Cleavage Assay to Screen the Proteolytic Activity of Proteases
0 Views •
2025
This video demonstrates an assay to screen for the proteolytic activity of proteases using fluorogenic peptides. The protease recognizes its cleavage site on the peptide, cleaving it and separating the quencher from the fluorophore, enabling its fluorescence emission. The fluorescence signal is detected and analyzed to check for the cleavage efficiency of different peptide variants.
09:00
Use of the Protease Fluorescent Detection Kit to Determine Protease Activity
0 Views •
Cited by 15 •
2009
The Protease Fluorescent Detection Kit is designed for the measurement of protease activity using fluorometry. It is also suitable for detection of trace amounts of protease contamination. The method is based on the proteolytic hydroysis of a proprietary formulation of a FITC-labeled casein substrate.
09:43
Protease- and Acid-catalyzed Labeling Workflows Employing 18O-enriched Water
0 Views •
Cited by 2 •
2013
Stable isotope labeling workflows employing 18O-enriched water (LeO-workflows) are versatile tools for quantitative and qualitative proteomics studies. In protease-assisted (PALeO) workflows, 18O-atoms are introduced by proteolytic cleavage and carboxyl oxygen exchange reactions mediated by proteases. In the acid-catalyzed (ALeO) workflow, 18O-atoms are introduced by carboxyl oxygen exchange at low pH.
07:33
Physical Properties Of Minerals I: Crystals and Cleavage
0 Views •
2023
Source: Laboratory of Alan Lester - University of Colorado Boulder The physical properties of minerals comprise various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. Each of these properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure. This experiment examines two properties that stem primarily from symmetric repetition of...
02:59
An In Vitro Assay for Measuring Neutrophil Serine Protease Activity Using a Fluorescent Reporter
0 Views •
2025
This video demonstrates an in vitro assay to quantify neutrophil serine protease activity in sputum samples. The sample containing secreted protease is incubated with a fluorescent reporter bearing a recognition motif. Cleavage of the motif by the protease enables individual fluorescence emission by the donor and acceptor fluorophore of the reporter, indicating protease activity in the sample.
FAQs
Its position defines the boundary that TEV protease can recognize and cut. Placing the engineered sequence between the tag and target protein allows cleavage to separate the purification or solubility aid from the protein of interest. The result is a target protein with a more native terminus, which can be important for downstream functional and structural studies.
Specificity comes from recognition of the engineered amino acid sequence rather than from a nonspecific reaction with the entire protein. TEV protease identifies the short ENLYFQ↓G motif and hydrolyzes the peptide bond between glutamine and glycine. Incorporating this defined sequence enables selective tag removal while limiting unwanted cleavage elsewhere in the construct.
Mild cleavage conditions help preserve the structural and functional state of the recombinant protein while the tag is removed. This is particularly useful when the purified product will undergo biochemical assays, structural analysis, or functional studies. Removing the tag without harsh treatment can reduce the chance that processing conditions interfere with the protein's activity.
The engineered recognition sequence is placed at the junction between the fusion partner and the target protein, so cutting occurs at a planned site rather than at an arbitrary position. After the peptide bond is hydrolyzed, the affinity or solubility tag is removed, leaving the protein of interest with fewer additional residues at its terminus.
Researchers first design the recombinant construct with a TEV recognition sequence between the protein of interest and its affinity or solubility tag. After the tagged protein has been purified, they apply TEV protease to cleave the engineered junction. The processed material can then be used for studies requiring a more native protein form.
The construct must contain the protein of interest, the selected fusion tag or linker, and an engineered TEV recognition sequence separating them. This arrangement gives the protease an accessible, predetermined cleavage junction after purification. Without that designed site, tag removal would not follow the specific cleavage strategy described for this method.
The method is useful when a fusion tag supports purification or solubility but could interfere with later experiments. Researchers can remove the tag before structural biology measurements, biochemical assays, or functional studies. It therefore connects recombinant protein production with experiments that require the target protein to more closely resemble its native form.
After cleavage, researchers obtain a protein preparation in which the affinity or solubility tag has been removed from the target protein. They can then assess the protein in structural, biochemical, or functional experiments without that fusion partner. The principal outcome is a more native protein terminus while retaining the benefits of tag-assisted purification earlier in the workflow.