Substrate Effects
Substrate Effects - Related Videos
11:13
Identification of Kinase-substrate Pairs Using High Throughput Screening
0 Views •
Cited by 1 •
2015
Protein phosphorylation is a central feature of how cells interpret and respond to information in their extracellular milieu. Here, we present a high throughput screening protocol using kinases purified from mammalian cells to rapidly identify kinases that phosphorylate a substrate(s) of interest.
04:25
Substrate Oxidation Assay in Cultured Cells: An In Vitro Assay to Quantify Substrate Oxidation in Cells by Measuring Radioactive Signals from Trapped CO2
0 Views •
2025
This video demonstrates a quantification technique for CO2 released during substrate oxidation using 14C-radiolabeled substrates. The released 14CO2 is trapped in an alkaline solution and quantified by a scintillation counter. The oxidation of different substrates varies between tissues and reflects the pathophysiological condition of the tissue.
11:53
Substrate Generation for Endonucleases of CRISPR/Cas Systems
0 Views •
Cited by 4 •
2012
CRISPR/Cas systems mediate adaptive immunity in Bacteria and Archaea. Many Cas proteins are proposed to act as endoribonucleases acting on crRNA precursors of varying length. Here we illustrate three different approaches to generate pre-crRNA substrates for the biochemical analysis of Cas endonuclease activity.
08:59
Defining Substrate Specificities for Lipase and Phospholipase Candidates
0 Views •
Cited by 10 •
2016
Many predicted (phospho)lipases are poorly characterized with regard to their substrate specificities and physiological functions. Here we provide a protocol to optimize enzyme activities, search for natural substrates, and propose physiological functions for these enzymes.
06:51
High-throughput Screening of Carbohydrate-degrading Enzymes Using Novel Insoluble Chromogenic Substrate Assay Kits
0 Views •
Cited by 5 •
2016
A high-throughput assay for enzyme screening is described. This multiplexed ready-to-use assay kit comprises of pre-chosen Chromogenic Polymer Hydrogel (CPH) substrates and complex Insoluble Chromogenic Biomass (ICB) substrates. Target enzymes are polysaccharide degrading endo-enzymes and proteases.
FAQs
Electron density and functional groups can influence which bonds are activated and how readily the substrate participates in a reaction. These electronic differences may favor one pathway over another, changing the relative amounts of products formed. Comparing related compounds therefore helps chemists connect functional-group patterns with reactivity and interpret why apparently similar substrates behave differently.
Steric hindrance can restrict how closely a substrate approaches a catalyst or reacting species, while molecular shape affects the orientation of that encounter. Solubility also influences whether the substrate can interact effectively within the reaction system. Together, these properties help explain changes in reaction rate, bond activation, product formation, and selectivity among structurally related compounds.
Substrate structure can make some reaction sites more accessible or electronically favorable than others, producing regioselectivity, which is preferential reaction at one location. Molecular shape and approach geometry can likewise favor one spatial arrangement of products, affecting stereoselectivity. These effects help account for differences in product distributions even when related substrates undergo the same general reaction.
A useful comparison examines related substrates while tracking differences in reaction rate, pathway, product distribution, selectivity, and yield. Structural features such as electron density, functional groups, steric hindrance, shape, and solubility provide variables for interpreting those observations. This approach supports mechanistic analysis by linking measurable reaction outcomes to specific substrate properties.
Substrate effects guide reaction optimization by showing which structural features support efficient bond activation, favorable selectivity, and higher product yield. Chemists can use these relationships when evaluating related compounds and refining a reaction system. The resulting understanding supports the development of synthetic methods that account for substrate-dependent differences rather than treating all reactants as equivalent.
In pharmaceutical chemistry and industrial chemical production, related substrates may differ substantially in rate, pathway, selectivity, or yield. Recognizing those differences helps inform catalyst design, reaction optimization, and method development. The same chemical principles connect small structural changes in a reactant with practical outcomes, including the efficiency and product distribution of larger-scale synthetic processes.