Non-competitive inhibitor: Difference between revisions
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The effects of a non-competitive inhibitor can be depicted by changes in its Michaelis-Menten graph<ref>Berg JM, Tymoczko JL, Gatto GJJ, Stayer L. Biochemistry. Eight Edition. New York: W. H. Freeman and Company; 2015</ref>: | The effects of a non-competitive inhibitor can be depicted by changes in its [[Michaelis-Menten constant|Michaelis-Menten]] graph<ref>Berg JM, Tymoczko JL, Gatto GJJ, Stayer L. Biochemistry. Eight Edition. New York: W. H. Freeman and Company; 2015</ref>: | ||
*'''K<sub>m</sub> is unaltered''' as the affinity with which substrates bind to the enzyme stays the same. | *'''[https://teaching.ncl.ac.uk/bms/wiki/index.php/Km K<sub>m</sub>] is unaltered''' as the affinity with which substrates bind to the enzyme stays the same. | ||
*'''V<sub>max</sub> decreases''' because rate of reaction decreases due to the fact that as the reaction progresses, the concentration/amount of effective enzymes decreases. | *'''[[Vmax|V<sub>max</sub>]] decreases''' because rate of reaction decreases due to the fact that as the reaction progresses, the concentration/amount of effective enzymes decreases. | ||
[[Image:Enzyme inhibitors.gif|Michael-Menten Graph depicting effects of competitive and non-competitive enzyme inhibitors.]] | [[Image:Enzyme inhibitors.gif|Michael-Menten Graph depicting effects of competitive and non-competitive enzyme inhibitors.]] | ||
Revision as of 20:07, 3 December 2016
A non-competitive inhibitor binds to an enzyme in another place other than its active site. This results in a change in the enzymes structure so that it is no longer complimentry to its substrate and therefore reduces its catalytic activity.
The effects of a non-competitive inhibitor can be depicted by changes in its Michaelis-Menten graph[1]:
- Km is unaltered as the affinity with which substrates bind to the enzyme stays the same.
- Vmax decreases because rate of reaction decreases due to the fact that as the reaction progresses, the concentration/amount of effective enzymes decreases.
References
- ↑ Berg JM, Tymoczko JL, Gatto GJJ, Stayer L. Biochemistry. Eight Edition. New York: W. H. Freeman and Company; 2015