Cholinesterases : substrate inhibition and substrate activation (CROSBI ID 86467)
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Reiner, Elsa ; Simeon-Rudolf, Vera
engleski
Cholinesterases : substrate inhibition and substrate activation
The relationship between activities and substrate concentrations (pS-curves) was analysed for reactions of acetylcholinesterase (EC 3.1.1.7) and butyrylcholinesterase (EC 3.1.1.8). Catalytic constants K-m, K-ss, V-m, n and b were calculated fi-om the Michaelis, Haldane, Hill and Webb equations in order to assess whether a given substrate also acts as an inhibitor or activator. It is suggested that the term substrate inhibition should only be attributed to substrates revealing bell-shaped pS-curves, while the terms apparent substrate inhibition or apparent substrate activation should relate to calculated values of the catalytic constants.
acetylcholinesterase; butyrylcholinesterase; catalytic constants
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