What Is The Induced Fit Model Of Enzyme Function
The induced fit model is an elaboration on the basic idea of the lock and key model. To the lock and key model the enzyme and its substrate fit together during catalysis like jigsaw puzzle pieces.
Enzyme And Metabolism
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.
What is the induced fit model of enzyme function. Instead the substrate interacts with the active site and both change their shape to fit together. The induced fit 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. As the enzyme and substrate come together their interaction causes a mild shift in the enzyme s structure that confirms an ideal binding arrangement between the enzyme and the transition state of the substrate.
For many years scientists thought that enzyme substrate binding took place in a simple lock and key fashion. The lock and key model states that the substrate acts as a key to the. But this model is not exactly right because it has been seen that only when enzyme and substrate come in close proximity of each other an induced fit occurs i e.
They change their original conformations a bit to perfectly fit into each other. In this model though the key and the enzyme active site do not fit perfectly together. The induced fit model is actually an offshoot of an earlier theory proposed by emil fischer in 1894 the lock and key model.
The induced fit model expands upon the lock and key model by describing a more dynamic interaction between enzyme and substrate.
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