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Post on 02-Nov-2015
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THEORIES
THEORIES.
1. Lock & Key specific enzyme FITS into a specific substrate
2. Induced Fit substrate ASSUMES the shape of the enzyme so as it would be able to fit; then the enzyme would be regenerated
ENZYMES
1. Oxidoreductases redox reaction( Dehydrogenases, oxidases, oxigenases, reductases, peroxidases, hydroxylases )
removal of H+ - oxidation
2. Transferases catalyzes a transfer of amino groups from one molecule to another
( Transcarboxylases, transmethylases, transamylases, kinases)
a portion of the enzyme usually binds covalently with its enzyme or coenzyme
requires presence of coenzyme
3. Hydrolases hydrolysis( Esterases, phosphatases, peptidases, amylases )
special class of transferase in which water serves as acceptor of the group transferred
4. Lyases non-hydrolytic and non-oxidative elimination reaction lysis of a subject generating a double bond
In the reverse direction of lyase, it catalyze the addition of one substrate to the double bond of the second substrate( Decarboxylases, hydratases, dehydratases, synthases )
5. Isomerases catalyzes isomerization (rearrangement) reactions
( Epimerases, Mutases )
6. Ligases catalyzes ligation
joining of 2 substrates, requires an input of energy in the form of ATP.
( Synthetase )
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