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Merck

330005

EST

A cell-permeable, irreversible inhibitor of cysteine proteases.

Synonym(s):

EST, Loxistatin, (2S,3S)- trans-Epoxysuccinyl-L-leucylamido-3-methylbutane Ethyl Ester, E-64d, Loxistatin, (2S,3S)-trans-Epoxysuccinyl-L-leucylamido-3-methylbutane Ethyl Ester, E-64d

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About This Item

Empirical Formula (Hill Notation):
C17H30N2O5
CAS Number:
88321-09-9
Molecular Weight:
342.43
UNSPSC Code:
12352200
NACRES:
NA.77
MDL number:
MFCD00132883
Assay:
≥97% (HPLC)
Form:
solid
Quality level:
100
Storage condition:
OK to freeze

Key Documents

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SMILES string

N([C@@H](CC(C)C)C(=O)NCCC(C)C)C(=O)[C@H]1O[C@@H]1C(=O)OCC

InChI

1S/C17H30N2O5/c1-6-23-17(22)14-13(24-14)16(21)19-12(9-11(4)5)15(20)18-8-7-10(2)3/h10-14H,6-9H2,1-5H3,(H,18,20)(H,19,21)/t12-,13-,14-/m0/s1

InChI key

SRVFFFJZQVENJC-IHRRRGAJSA-N

description

RTECS - RR0404300

assay

≥97% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

color

white

solubility

DMSO: soluble

shipped in

ambient

storage temp.

−20°C

Quality Level

100

Related Categories

General description

A cell-permeable, irreversible inhibitor of cysteine proteases. Similar to E-64 (Cat. No. 324890) but devoid of charged groups. Reported to inhibit calpain-1 activation. The inhibitory activity of EST has been attributed to E-64c, the free acid formed by hydrolysis of the ester in vivo. Used in animal models of muscular dystrophy.

Biochem/physiol Actions

Cell permeable: yes
Primary Target
calpain-1
Product does not compete with ATP.
Reversible: no
Target IC50: 10-100 µM for calpain-1

Preparation Note

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for 6 months at -20°C.

Other Notes

Inomata, M., et al. 1996. Arch. Biochem. Biophys. 328, 129.
Mehdi, S. 1991. Trends Biochem. Sci. 16, 150.
McGowan, E.B., et al. 1989. Biochem. Biophys. Res. Commun.158, 432.
Tamai, M., et al. 1987. J. Pharmacobiodyn.10, 678.
Komatsu, K., et al. 1986. Exp. Neurol. 91, 23.
Tamai, M., et al. 1986. J. Pharmacobiodyn. 9, 672.

Legal Information

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

Disclaimer

Toxicity: Irritant (B)

Storage Class

11 - Combustible Solids

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

330005-MG: + 330005-1MG:

jan

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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S Birken et al.
The Journal of endocrinology, 171(1), 131-141 (2001-09-27)
The gonadotropins are a family of closely related heterodimeric glycoprotein hormones homologous in structure to disulfide-knot growth factors. Metabolic proteolytic processing in vivo of this disulfide cross-linked region results in urinary excretion of a residual highly stable core structure. The
Naoko Iwata-Yoshikawa et al.
Nature communications, 13(1), 6100-6100 (2022-10-16)
In cultured cells, SARS-CoV-2 infects cells via multiple pathways using different host proteases. Recent studies have shown that the furin and TMPRSS2 (furin/TMPRSS2)-dependent pathway plays a minor role in infection of the Omicron variant. Here, we confirm that Omicron uses
Zhifen Cui et al.
Nature chemical biology, 18(10), 1056-1064 (2022-07-26)
SARS-CoV-2 entry into cells requires specific host proteases; however, no successful in vivo applications of host protease inhibitors have yet been reported for treatment of SARS-CoV-2 pathogenesis. Here we describe a chemically engineered nanosystem encapsulating CRISPR-Cas13d, developed to specifically target
Panke Qu et al.
mBio, 14(1), e0317622-e0317622 (2023-01-11)
The rapid spread and strong immune evasion of the SARS-CoV-2 Omicron subvariants has raised serious concerns for the global COVID-19 pandemic. These new variants exhibit generally reduced fusogenicity and increased endosomal entry pathway utilization compared to the ancestral D614G variant
Cong Zeng et al.
bioRxiv : the preprint server for biology (2021-06-09)
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly transmissible coronavirus responsible for the global COVID-19 pandemic. Herein we provide evidence that SARS-CoV-2 spreads through cell-cell contact in cultures, mediated by the spike glycoprotein. SARS-CoV-2 spike is more efficient
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Global Trade Item Number

SKUGTIN
330005-1MGCN04055977195699

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