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AEBSF or 4-(2-aminoethyl)benzenesulfonyl fluoride hydrochloride is a water-soluble, irreversible serine protease inhibitor with a molecular weight of 239.5 Da. It inhibits proteases like chymotrypsin, kallikrein, plasmin, thrombin, and trypsin. The specificity is similar to the inhibitor PMSF, nevertheless AEBSF is more stable at low pH values ...
Many naturally occurring protease inhibitors are proteins. [2] In medicine, protease inhibitor is often used interchangeably with alpha 1-antitrypsin (A1AT, which is abbreviated PI for this reason). [3] A1AT is indeed the protease inhibitor most often involved in disease, namely in alpha-1 antitrypsin deficiency.
These protease inhibitors prevent viral replication by selectively binding to viral proteases (e.g. HIV-1 protease) and blocking proteolytic cleavage of protein precursors that are necessary for the production of infectious viral particles. Protease inhibitors that have been developed and are currently used in clinical practice include:
The inhibitor binds to the zinc at the active center of the enzyme, thereby blocking its activity. Other inhibitor mechanisms are possible. [1] α2-Macroglobulin (α2M) is a protease inhibitor which inhibits activated MMPs. α2M and MMP form a complex which is able to inactivate the MMP. [9]
MG132 is a potent, reversible, and cell-permeable proteasome inhibitor [1] (K i = 4 nM). It belongs to the class of synthetic peptide aldehydes. [2] [3] It reduces the degradation of ubiquitin-conjugated proteins in mammalian cells and permeable strains of yeast by the 26S complex without affecting its ATPase or isopeptidase activities.
The MEROPS online database for peptidases and their inhibitors: NEM [permanent dead link ] The bifunctional analogues such as p-NN′-phenylenebismaleimide can be used as cross-linking reagent for cystine residues. see Lutter, L. C., Zeichhardt, H., Kurland, C. G. & Stoffier, G. (1972) Mol. Gen. Genet. 119, 357-366.
Leupeptin, also known as N-acetyl-L-leucyl-L-leucyl-L-argininal, is a naturally occurring protease inhibitor that can inhibit cysteine, serine and threonine peptidases.. It is often used during in vitro experiments when a specific enzymatic reaction is being studied.
In biochemistry, phenylmethylsulfonyl fluoride (PMSF) is a serine protease inhibitor (serine hydrolase inactivator) commonly used in the preparation of cell lysates. PMSF does not inactivate all serine proteases. [1] The effective concentration of PMSF is between 0.1 - 1 mM.
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