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What is allosteric inhibitor of glutamate dehydrogenase?
GTP
What is the difference between a noncompetitive inhibitor and an allosteric inhibitor in enzyme regulation?
A noncompetitive inhibitor binds to an enzyme at a site other than the active site, while an allosteric inhibitor binds to a different site on the enzyme, causing a change in the enzyme's shape and reducing its activity.
What is the difference between a competitive inhibitor and an allosteric inhibitor in terms of their mechanisms of action on enzymes?
A competitive inhibitor competes with the substrate for the active site of an enzyme, blocking its function. An allosteric inhibitor binds to a different site on the enzyme, causing a conformational change that reduces the enzyme's activity.
What is the difference between an allosteric inhibitor and a competitive inhibitor in terms of their mechanisms of action on enzyme activity?
An allosteric inhibitor binds to a site on the enzyme that is separate from the active site, causing a change in the enzyme's shape and reducing its activity. A competitive inhibitor, on the other hand, competes with the substrate for binding to the active site of the enzyme, blocking its function.
How does an allosteric inhibitor function to regulate enzyme activity?
An allosteric inhibitor regulates enzyme activity by binding to a site on the enzyme that is different from the active site. This binding changes the enzyme's shape, making it less effective at catalyzing reactions.
What is the difference between an allosteric inhibitor and a noncompetitive inhibitor in terms of their mechanisms of action on enzyme activity?
An allosteric inhibitor binds to a site on the enzyme that is different from the active site, causing a change in the enzyme's shape and reducing its activity. A noncompetitive inhibitor binds to either the enzyme or the enzyme-substrate complex, also reducing enzyme activity but without directly competing with the substrate for the active site.
Which type of control agent exerts noncompetitive inhibition?
A noncompetitive inhibitor binds to an allosteric site on the enzyme, causing a conformational change that reduces the enzyme's activity without competing with the substrate for the active site. This type of control agent is called a noncompetitive inhibitor.
What blocks enzyme activity by binding to allosteric site of an enzyme causing the enzyme's active site to change shape?
Allosteric inhibitors bind to a specific site on an enzyme (allosteric site) other than the active site, inducing a conformational change that decreases enzyme activity. This alteration prevents the substrate from binding to the active site, thus blocking the enzyme's ability to catalyze reactions.
Which one of the following would you predict is an allosteric inhibitor of the Krebs cycle enzyme ketoglutarate dehydrogenase?
It is likely that ATP could act as an allosteric inhibitor of ketoglutarate dehydrogenase in the Krebs cycle. High levels of ATP signal that the cell has sufficient energy, so it would make sense for ATP to inhibit an enzyme involved in generating more energy through the cycle.
What are the key differences between non-competitive inhibition and allosteric inhibition in enzyme regulation?
Non-competitive inhibition occurs when an inhibitor binds to an enzyme at a site other than the active site, changing the enzyme's shape and reducing its activity. Allosteric inhibition involves an inhibitor binding to a specific regulatory site on the enzyme, causing a conformational change that decreases enzyme activity. The key difference is that non-competitive inhibition does not compete with the substrate for the active site, while allosteric inhibition involves binding to a separate site on the enzyme.
Why does adding additional substrate overcome competitive but not noncompetitive inhibition?
A competitive inhibitor competes with the substrate to bind to the active site while a noncompetitive inhibitor binds to an allosteric site of the enzyme (one other than the active site). Thus no amount of substrate can overcome or in a sense interfere with the inhibitors binding to an allosteric site.
Does Allosteric regulation depends on inhibitors binding to the active site of enzymes?
No, allosteric regulation involves molecules binding to a site other than the active site (allosteric site) to either activate or inhibit enzyme activity. This type of regulation can involve activators or inhibitors that induce conformational changes in the enzyme, affecting its activity.
