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  • What are enzyme inhibitors? Classify them on the basis of their mode of attachments on the active site of enzymes. With the help of diagrams explains how do inhibitors inhibit the enzymatic activity.

What are enzyme inhibitors? Classify them on the basis of their mode of attachment on the active site of enzymes. With the help of diagrams explains how inhibitors inhibit enzymatic activity.

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The role of enzyme inhibitors is to bind to the enzyme site so as to block the attachment of the substrate to the active site. -This overall inhibits the catalytic activity of the enzyme. Their mode of action is -

 (i) By following the competitive mechanism approach, they challenge the substrate for attachment to the active site of the enzyme. These drugs are known as competitive inhibitors.

(ii) The second mechanism includes the bonding of the inhibitor drug with the allosteric site. It changes the shape of the active site completely, thus making it unrecognizable to the substrate. These are called a non-competitive inhibitor. Due to the bond formed between the two being a strong covalent bond, it is a rather permanent inhibition of the substrate.

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Gurleen Kaur

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