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Additional recommended knowledge
Examples of Cysteine Proteases
Proteases are usually synthesized as large precursor proteins called zymogens, such as the serine protease precursors trypsinogen and chymotrypsinogen, and the aspartic protease precursor pepsinogen. The protease is activated by removal of an inhibitory segment or protein. Activation occurs once the protease is delivered to a specific intracellular compartment (e.g. lysosome) or extracellular environment (e.g. stomach). This system prevents the cell that produces the protease from being damaged by it.
Protease inhibitors are usually proteins with domains that enter or block a protease active site to prevent substrate access. In competitive inhibition, the inhibitor binds to the active site, thus preventing enzyme-substrate interaction. In non-competitive inhibition, the inhibitor binds to an allosteric site, which alters the active site and makes it inaccessible to the substrate.
Examples of Protease Inhibitors
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cysteine_protease". A list of authors is available in Wikipedia.|