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Electrostatic and Metal Ion Catalysis definitions

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  • Enzyme
    Biological catalyst with an active site containing specific amino acids that accelerates biochemical reactions by stabilizing transition states.
  • Active Site
    Region within a biological catalyst where specific amino acids are positioned to interact with substrates and facilitate reaction mechanisms.
  • Transition State
    Unstable molecular configuration during a reaction, whose stabilization by catalysts is crucial for increasing reaction speed.
  • Electrostatic Catalysis
    Mechanism where a biological catalyst stabilizes charges in the transition state through direct non-covalent interactions with charged amino acids.
  • Metal Ion Catalysis
    Subtype of electrostatic catalysis involving cofactors that indirectly stabilize substrate charges, enhancing reaction rates.
  • Cofactor
    Non-protein component, often a metal ion, required by a biological catalyst to facilitate substrate stabilization and reaction acceleration.
  • Aspartate
    Negatively charged amino acid frequently positioned in the active site to form stabilizing interactions with transition states.
  • Lysine
    Positively charged amino acid commonly found in active sites, contributing to direct stabilization of transition state charges.
  • Arginine
    Charged amino acid in active sites, known for forming electrostatic bonds with unstable molecular configurations during catalysis.
  • Glutamate
    Negatively charged amino acid that participates in stabilizing transition states through electrostatic interactions.
  • Copper
    Metal ion cofactor used by biological catalysts to stabilize negative charges on substrates, facilitating faster reaction rates.
  • Substrate
    Molecule acted upon by a biological catalyst, whose orientation and charge stabilization are essential for efficient reaction.
  • Enolate
    Intermediate with a carbon-carbon double bond and an oxygen atom, formed during decarboxylation and stabilized by metal ion cofactors.
  • Ketone
    Product with a carbonyl group bonded to two R groups, generated after protonation in a catalyzed reaction mechanism.
  • Decarboxylation
    Reaction mechanism involving removal of a carbon dioxide group from a substrate, often facilitated by metal ion catalysis.