N-(Methoxysuccinyl)-Ala-Ala-Pro-Val-chloromethyl ketone

elastase inhibitor

N-(Methoxysuccinyl)-L-alanyl-L-alanyl-L-prolyl-L-valine chloromethylketone
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:

Quality Level


≥98% (TLC)




159  °C


methanol: 50 mg/mL, clear, colorless

storage temp.


SMILES string




InChI key


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General description

N-(Methoxysuccinyl)-Ala-Ala-Pro-Val-chloromethyl ketone is a tetrapeptide, cell-permeable and non-cytotoxic inhibitor.


N-(Methoxysuccinyl)-Ala-Ala-Pro-Val-chloromethyl ketone has been used as an elastase specific inhibitor.

Biochem/physiol Actions

N-(Methoxysuccinyl)-Ala-Ala-Pro-Val-chloromethyl ketone acts as a competitive inhibitor of human leukocyte elastase (HLE).
Irreversible inhibitor of human leukocyte and neutrophil elastase.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Takeshi Kawamura et al.
Microbiology and immunology, 46(3), 225-230 (2002-05-15)
Carboxypeptidase R (EC; CPR) is an unstable basic carboxypeptidase found in fresh serum in addition to carboxypeptidase N (CPN) which is a stable enzyme. CPR in fresh serum is generated from its zymogen (proCPR) during coagulation by trypsin-like enzymes...
E J Bates et al.
Journal of leukocyte biology, 54(6), 590-598 (1993-12-01)
Previously published work has indicated that polyunsaturated fatty acids (PUFA) may enhance neutrophil-mediated damage to host tissues. We have found that endothelial detachment was significantly increased by neutrophils pretreated with docosahexaenoic (22:6, n-3) and arachidonic (20:4, n-6) acids at 10-40...
R M Senior et al.
The Journal of clinical investigation, 69(2), 384-393 (1982-02-01)
As an approach to facilitating the understanding of proteinases associated with monocytes we have studied U-937 monocytelike cells. Elastase activity was identified in U-937 cell extracts and compared to monocyte elastase activity, neutrophil elastase, and the elastase activity from a...
L A Smedly et al.
The Journal of clinical investigation, 77(4), 1233-1243 (1986-04-01)
The neutrophil has been implicated as an important mediator of vascular injury, especially after endotoxemia. This study examines neutrophil-mediated injury to human microvascular endothelial cells in vitro. We found that neutrophils stimulated by formyl-methionyl-leucyl-phenylalanine (FMLP), the complement fragment C5a, or...
Proteolytic cleavage of annexin 1 by human leukocyte elastase
Rescher U, et al.
Biochimica et Biophysica Acta - Molecular Cell Research, 1763(11), 1320-1324 (2006)
Enzyme Explorer Product Application Index for Elastase. Leukocyte elastase is a 29KDa serine endoprotease of the Proteinase S1 Family. It exists as a single 238 amino acid-peptide chain with four disulfide bonds.
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