enzyme inhibitor

In biochemistry, an enzyme inhibitor is a compound that interacts with an enzyme, reducing its activity. This interaction can occur in two primary ways: competitive inhibition, where the inhibitor resembles the enzyme's usual substrate and binds to the active site, blocking the substrate; and noncompetitive inhibition, where the inhibitor binds to a different site on the enzyme, altering the active site's shape and preventing the substrate from reacting effectively.1

Enzymes are crucial proteins that regulate biochemical reactions in living organisms. Inhibitors are vital for controlling these enzymatic processes. For example, some inhibitors, known as antimetabolites, are used in chemotherapy to target disease-causing bacteria without harming human cells. Other inhibitors, like nerve gases, can irreversibly block enzyme function by forming strong bonds at the active site, disrupting essential biological processes.2