Protein Cleavage
Protein Cleavage - Related Videos
01:33
Cleavage and Blastulation
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2019
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller. Zygotic Genome Activation At the beginning of embryogenesis, maternal mRNAs control development. However, by the eight-cell stage of cleavage, embryonic genes become activated in a process called...
03:34
Assessing Caspase-Mediated Cleavage of Viral and Host Proteins in Virus-Infected Cells
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2025
The video demonstrates a method to assess caspase-mediated protein cleavage in virus-infected cells. Post-viral infection, caspases get activated and degrade various host cellular proteins and viral nucleoproteins while specific caspase inhibitors prevent this degradation, as confirmed by western blotting.
07:33
Physical Properties Of Minerals I: Crystals and Cleavage
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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...
02:42
A Fluorogenic Peptide Cleavage Assay to Screen the Proteolytic Activity of Proteases
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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.
07:53
A Fluorogenic Peptide Cleavage Assay to Screen for Proteolytic Activity: Applications for coronavirus spike protein activation
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Cited by 24 •
2019
We present a fluorogenic peptide cleavage assay that allows a rapid screening of the proteolytic activity of proteases on peptides representing the cleavage site of viral fusion peptides. This method can also be used on any other amino acid motif within a protein sequence to test for the protease activity.
FAQs
Selectivity comes from recognition of a particular amino acid sequence or structural feature. When that target is accessible, the protease can hydrolyze the associated peptide bond. This recognition logic lets engineers distinguish intended processing sites from other regions, supporting controlled maturation or activation of designed proteins.
Enzymatic cleavage depends on a protease's recognition of sequence or structure, whereas chemical reagents act at chemically defined sites under controlled conditions. This distinction gives engineers two routes for processing or analysis. The choice depends on whether biological recognition or reagent-defined specificity better matches the protein design.
Sequence- or structure-dependent recognition makes site selection important. An engineered cleavage site can be placed so that a protein segment, purification tag, signal peptide, or activation-related region is released when processing occurs. In bioengineering, this design principle connects bond location to the desired change in protein composition, activity, or downstream usability.
A practical workflow begins by selecting a protease-recognition sequence, structural target, or chemically defined site that matches the intended protein design. The chosen enzymatic or chemical treatment is then applied under controlled conditions, and the resulting cleavage is used for recombinant processing or protein analysis. This workflow links site choice and reaction control to the desired outcome.
Within recombinant protein engineering, cleavage can remove purification tags or signal peptides after they have served their role. It can also activate engineered zymogens through a specific processing event. These uses make cleavage a modular control point, allowing protein maturation, purification-related design, and activity regulation to be addressed through deliberate site placement.
Beyond processing individual proteins, designed cleavage sites support modular biomaterials, biosensors, and therapeutic proteins. In these systems, the site provides a point at which function can be regulated by specific biological or engineered conditions. Protein cleavage also assists structure mapping, helping researchers investigate protein organization while building responsive bioengineered systems.