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03-34-0051

Sigma-Aldrich

Calpeptin

A cell-permeable calpain inhibitor (ID₅₀ = 52 nM for calpain-1; ID₅₀ = 34 nM for calpain-2; ID₅₀ = 138 nM for papain).

Synonym(s):

Calpeptin, Benzyloxycarbonylleucyl-norleucinal

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About This Item

Empirical Formula (Hill Notation):
C20H30N2O4
CAS Number:
117591-20-5
Molecular Weight:
362.46
MDL number:
MFCD00155623
UNSPSC Code:
12352202
NACRES:
NA.77

Quality Level

100

Assay

≥94% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

color

white to off-white

solubility

DMF: 5 mg/mL
DMSO: 5 mg/mL

shipped in

ambient

storage temp.

−20°C

InChI

1S/C20H30N2O4/c1-4-5-11-17(13-23)21-19(24)18(12-15(2)3)22-20(25)26-14-16-9-7-6-8-10-16/h6-10,13,15,17-18H,4-5,11-12,14H2,1-3H3,(H,21,24)(H,22,25)/t17-,18-/m0/s1

InChI key

PGGUOGKHUUUWAF-ROUUACIJSA-N

General description

Calpeptin inhibits the Ca2+-stimulatedcleavage of p35 to p25 by calpain. It regulates the processing of β-amyloidprecursor protein to β-amyloid (Aβ). Calpeptin alleviates neurite elongation indifferentiating PC12 cells. In platelets, it prevents Ca2+-ionophore-induceddegradation of actin binding protein and P235. It blocks the myosinlight chain phosphorylation in platelets stimulated by collagen, ionomycin, orthrombin. Calpeptin inhibits the growth of estrogen receptor positive breast cancer cells. Calpeptin is a cell permeable calpain blocker. It also blocks theactivation of T-cells in the immune system. It has been observed that calpeptininduces secondary inflammatory responses and apoptosis in muscle cells.

Biochem/physiol Actions

Cell permeable: yes
ID50 = 52 nM for calpain-1; 34 nM for calpain-2; 138 nM for papain
Product does not compete with ATP.
Reversible: no

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Sequence

Z-Leu-Nle-CHO

Preparation Note

Dissolve in a minimal amount of DMF or DMSO then add H₂O, buffer or medium just prior to use.

Other Notes

Lee, M.S., et al. 2000. Nature405, 360.
Yamazaki, T., et al. 1997. Biochemistry27, 8377.
Klafki, H., et al. 1996. J. Biol. Chem.271, 28655.
Shiba, E., et al. 1996. Anticancer Res. 16, 773.
Pinter, M., et al. 1994. Neurosci. Lett. 170, 91.
Saito, K., and Nixon, R.A. 1993. Neurochem. Res. 18, 231.
Tsujinaka, T., et al. 1988. Biochem. Biophys. Res. Commun.153, 1201.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Jingjing Zuo et al.
Pathology, research and practice, 214(8), 1199-1209 (2018-08-07)
Exposure to cigarette smoke including secondhand smoking is the most important risk factor in the development of chronic obstructive pulmonary disease where incidence has substantially increased in recent decades. The mechanisms responsible for cigarette smoke-induced pulmonary inflammation remain unclear, and
Marta Surbek et al.
Scientific reports, 13(1), 21550-21550 (2023-12-07)
Transglutaminase 1 (TGM1) plays an essential role in skin barrier formation by cross-linking proteins in differentiated keratinocytes. Here, we established a protocol for the antibody-dependent detection of TGM1 protein and the parallel detection of TGM activity. TGM1 immunoreactivity initially increased
Archna Sharma et al.
Molecular neurobiology, 60(6), 3311-3328 (2023-03-01)
Abnormal calcium homeostasis, activation of protease calpain, generation of p25 and hyperactivation of cyclin-dependent kinase 5 (Cdk5) have all been implicated in the pathogenesis of neurogenerative diseases including Alzheimer's disease. We have recently shown that extracellular cold-inducible RNA-binding protein (eCIRP)
L Rodríguez-Fernández et al.
Scientific reports, 11(1), 16339-16339 (2021-08-13)
Calpain-2 (CAPN2) is a processing enzyme ubiquitously expressed in mammalian tissues whose pleiotropic functions depend on the role played by its cleaved-products. Nuclear interaction networks, crucial for a number of molecular processes, could be modified by CAPN2 activity. However, CAPN2
Jin-Eun Kim et al.
Oncology reports, 49(3) (2023-02-18)
Colon cancer is one of the most frequent malignant neoplasms worldwide. Epidemiological studies suggested that the development of colon cancer can be prevented by plant‑derived ingredients. In the present study, the chemopreventive activity of buddlejasaponin IV (BS‑IV), isolated from the
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