BIOCHEMISTRY EXAM 3 (Enzymes)
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19 Terms
Catalyst
speeds up a rxn and does not get used up in the rxn
Enzymes are…
biological catalysts
A protein with a catalytically active shape is a…
enzyme
Enzymes catalyze rxns through a diverse set of…
mechanisms
Substrate
the molecules the enzyme typically acts on in the biological context
Product
the molecules produced after the rxn is catalyzed
Active Site
a substrate “pocket” in the final tertiary or quaternary structure where substrates bind
Enzymes often require … for Activity
Cofactors
Describe the relationship between different types of cofactors
Cofactors → Metal ions + (Coenzymes → Cosubstrates + Prosthetic groups)
What type of bonding do cosubstrates do?
Temporary Binding
What type of bonding do prosthetic groups do?
Strongly bound
What is thiamine pyrophosphate? (coenzyme
a Vit B1 derivative
What is pyridoxal phospahte? (coenzyme)
What vitamins are coenxymes?
Vit B1 derivative, Vit B6, Vit B7, Vit B12
What is a cofactor for carbonic anhydrase?
Zn2+
What is a cofactor for Mn?
superoxide dismutase
Apoenzyme
the inactive protein component of an ezyme that requires a cofactor (a non-protein molecule) to become fully functional
Holoenzyme
the active protein w/ its cofactors