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Enzyme Inhibition definitions

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  • Enzyme Inhibition
    Cellular process where compounds decrease the initial velocity of enzyme-catalyzed reactions, affecting product formation.
  • Enzyme Inhibitor
    Specific compound that interferes with product formation, slowing or halting enzyme activity in biological systems.
  • Initial Reaction Velocity
    Rate at which an enzyme catalyzes a reaction before any significant product accumulates or inhibition occurs.
  • Free Enzyme
    Catalytic protein not bound to substrate, available for interaction with inhibitors or substrate molecules.
  • Enzyme-Substrate Complex
    Temporary molecular assembly formed when an enzyme binds its substrate, enabling catalysis or inhibition.
  • EI Complex
    Molecular structure resulting from an inhibitor binding to a free enzyme, preventing substrate interaction.
  • ESI Complex
    Assembly formed when an inhibitor binds to the enzyme-substrate complex, blocking further reaction progress.
  • Irreversible Inhibitor
    Compound that permanently disables enzyme activity, often referred to as an inactivator in biochemical contexts.
  • Reversible Inhibitor
    Compound that temporarily reduces enzyme activity, allowing normal function to resume once removed.
  • Competitive Inhibitor
    Molecule that competes with substrate for enzyme binding, affecting reaction rate by blocking active sites.
  • Uncompetitive Inhibitor
    Compound that binds only to the enzyme-substrate complex, altering reaction dynamics and reducing velocity.
  • Mixed Inhibitor
    Inhibitor capable of binding both free enzyme and enzyme-substrate complex, impacting reaction in multiple ways.
  • Noncompetitive Inhibitor
    Compound that binds to an enzyme regardless of substrate presence, decreasing activity without direct competition.
  • Regulation
    Cellular mechanism using inhibitors to control enzyme activity, maintaining proper product levels and metabolic balance.
  • Defense Mechanism
    Biological strategy where inhibitors act as poisons to protect cells from pathogens or harmful organisms.