What Is The Induced Fit Model Of Enzyme Activity
The induced fit model is an elaboration on the basic idea of the lock and key model. The lock and key model states that the substrate acts as a key to the.
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The basis of the so called induced fit theory which states that the binding of a substrate or some other molecule to an enzyme causes a change in the shape of the enzyme so as to enhance or inhibit its activity.
What is the induced fit model of enzyme activity. In this model though the key and the enzyme active site do not fit perfectly together. The favored model for the enzyme substrate interaction is the induced fit model this model proposes that the initial interaction between enzyme and substrate is relatively weak but that these weak interactions rapidly induce conformational changes in the enzyme that strengthen binding. The induced fit model is actually an offshoot of an earlier theory proposed by emil fischer in 1894 the lock and key model.
The basic theory behind the lock and key model the idea that substrates have to fit the enzyme is still the same but in the induced fit model the active site is simply less rigid. Instead the substrate interacts with the active site and both change their shape to fit together. The advantages of the induced fit mechanism arise due to the stabilizing effect of strong enzyme binding.
Since enzymes are rather flexible structures the active site is continuously reshaped by interactions with the substrate as the substrate interacts with the enzyme. Induced fit model in 1958 daniel koshland suggested a modification to the lock and key model. Other articles where induced fit theory is discussed.
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