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6 Cards in this Set
- Front
- Back
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Oxidoreductases |
Catalyze oxidation-reduction reactions (transfer of electrons between biological molecules). -Rxn catalyzed by Oxidoreductases, e- donor known as Reductant and e- acceptor known as Oxidant -Enzymes with dehydrogenase or reductase are ususally oxidoreductases |
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Transferases |
Catalyze the movement of a functional group from one molecule to another. -Ex. aminotransferase can convert aspartate and α-ketoglutarate as a pair to glutamate and oxaloacetate by moving the amino group from aspartate to α-ketoglutarate -Kinases are members of this class, they catalyze the transfer of a phosphate group |
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Hydrolases |
Catalyze the breaking of a compound into 2 molecules using the addition of water. -Ex. phosphatase cleaves a phosphate group from another molecule. -Ex. peptidases, nucleases, lipases |
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Lyases |
Catalyze the cleavage of a single molecule into 2 products. Do not require water or act as oxidoreductases. Catalyze the synthesis of two molecules into a single molecule (when performing this function, known as Synthases) |
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Isomerases |
Catalyze the rearrangement of bonds within a molecule. Can be classified as oxidoreductases, transferases, or lyases depending on mechanism of enzyme. -Catalyze reactions between stereoisomers and constitutional isomers. |
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Ligases |
Catalyze addition or synthesis reactions, generally between large similar molecules, and often require ATP. -Synthesis reactions between smaller molecules are generally accomplished with Lyases. -Likely to be encountered in nucleic acid synthesis and repair. |
