Enzymatic Steps
Enzymatic Steps - Related Videos
09:27
Rapid One-step Enzymatic Synthesis and All-aqueous Purification of Trehalose Analogues
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Cited by 12 •
2017
Trehalose analogues are emerging as important molecules for bio(techno)logical and biomedical applications. We describe an optimized protocol for enzymatically synthesizing and purifying trehalose analogues that is simple, efficient, fast, and environmentally friendly. Its application to the rapid production and administration of a probe for the detection of mycobacteria is demonstrated.
09:58
Light-driven Enzymatic Decarboxylation
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Cited by 6 •
2016
We describe a protocol for the light-catalyzed generation of hydrogen peroxide — a cofactor for oxidative transformations.
09:07
Single-Step Enrichment of a TAP-Tagged Histone Deacetylase of the Filamentous Fungus Aspergillus nidulans for Enzymatic Activity Assay
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Cited by 5 •
2019
Class 1 histone deacetylases (HDACs) like RpdA have gained importance as potential targets to treat fungal infections. Here we present a protocol for the specific enrichment of TAP-tagged RpdA combined with an HDAC activity assay that allows in vitro efficacy testing of histone deacetylase inhibitors.
06:40
Seven Steps to Stellate Cells
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Cited by 67 •
2011
Here we describe a method for the isolation of hepatic stellate cells from mouse liver. For stellate cell purification, mouse livers are digested in situ and in vitro by pronase-collagenase treatment prior to density gradient centrifugation. This technique yields highly pure hepatic stellate cells.
06:01
A Dye Release Assay to Quantify Enzymatic Activity of Antimicrobial Proteins
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2025
This video demonstrates the dye release assay for quantifying the enzymatic activity of antimicrobial proteins. The antimicrobial protein degrades the bacteria's dye-labeled cell wall and releases the dye molecules turning the solution blue. The absorbance of the solution correlates with the enzymatic activity of the antimicrobial protein.
FAQs
Specificity comes from the active site’s chemical environment, which allows an enzyme to recognize a particular substrate and position it for a defined chemical change. Chemical groups in the active site participate directly in the reaction, while cofactors can assist when the enzyme requires additional chemical capability. These features help explain why related substrates may undergo different enzymatic steps.
A pathway gains continuity when the product formed in one enzymatic step serves as the substrate for a subsequent reaction. This arrangement connects separate chemical transformations into an ordered process, so a genetic or chemical disruption at one point can affect later steps. Tracking these connections helps researchers identify where pathway function is altered.
Analyzing individual reactions makes it possible to assign a specific chemical transformation to a particular enzyme and examine its contribution to the larger pathway. This level of resolution helps researchers locate regulated points, connect disrupted reactions with biological consequences, and distinguish which step may be suitable for targeted investigation or intervention.
Researchers map a pathway by linking each substrate to the product generated by its enzyme-catalyzed reaction, then arranging those transformations in sequence. They can also record the active-site requirements and any cofactors associated with each step. The resulting map provides a framework for studying pathway organization, regulation, and the effects of genetic or chemical disruption.
They occur in several major biological processes, including metabolism, DNA replication, and cellular signaling. In each setting, sequential reactions allow a complex process to be broken into defined transformations that can be analyzed separately. Comparing steps across these contexts helps researchers relate enzyme activity to broader cellular functions rather than viewing reactions as isolated events.
Mapping disrupted steps can reveal how a genetic change or chemical influence affects a biochemical pathway. Researchers can identify the reaction associated with the alteration and determine which later products or processes may be affected. This information supports experiments designed to investigate pathway function and can guide efforts to target particular reactions in therapeutic research.