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426100

Sigma-Aldrich

Lactacystin, Synthetic

Lactacystin, Synthetic, CAS 1258004-00-0, is an irreversible inhibitor of 20S proteasome inhibitor (IC₅₀ = 500 nM). A covalent inhibitor of the chymotrypsin & trypsin-like activities of proteasome.

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Synonym(s):
Lactacystin, Synthetic, Proteasome Inhibitor VI
Empirical Formula (Hill Notation):
C15H24N2O7S
CAS Number:
Molecular Weight:
376.43

Quality Level

assay

≥99% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze

color

white

solubility

DMSO: 50 mg/mL
water: soluble

shipped in

ambient

storage temp.

−20°C

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clasto-Lactacystin β-Lactone

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

100

manufacturer/tradename

Calbiochem®

manufacturer/tradename

Calbiochem®

manufacturer/tradename

-

manufacturer/tradename

Calbiochem®

form

solid

form

solid

form

powder

form

solid

color

white

color

off-white

color

-

color

white

solubility

DMSO: 50 mg/mL, water: soluble

solubility

water: 50 mg/mL

solubility

water: 10 mg/mL, clear, colorless

solubility

DMSO: 3 mg/mL

General description

An irreversible proteasome inhibitor. A Streptomyces metabolite that acts as a highly specific inhibitor of the 20S proteasome (MCP; multicatalytic proteinase complex) (IC50 = 500 nM for 20S proteasome). Blocks proteasome activity by targeting the catalytic β-subunit. Acts as a covalent inhibitor of the chymotrypsin- and trypsin-like activities of the proteasome. Induces neurite outgrowth in Neuro 2A mouse neuroblastoma cells and inhibits progression of synchronized Neuro 2A cells and MG-63 human osteosarcoma cells beyond the G1 phase of the cell cycle. Reported to induce apoptosis in human monoblast U937 cells. Also inhibits NF-κB activation (IC50 = 10 µM).
An irreversible proteasome inhibitor. A Streptomyces metabolite that acts as a highly specific inhibitor of the 20S proteasome (MCP; multicatalytic proteinase complex) (IC50 = 500 nM for 20S proteasome). Blocks proteasome activity by targeting the catalytic β-subunit. Acts as a covalent inhibitor of the chymotrypsin and trypsin-like activities of the proteasome. Induces neurite outgrowth in Neuro 2A mouse neuroblastoma cells beyond theG1 phase of the cell cycle. Reported to induce apoptosis in human monoblast U937 cells. Also inhibits NF-κB activation (IC50 = 10 µM)

Biochem/physiol Actions

Cell permeable: no
Primary Target
20S proteasome (MCP; multicatalytic proteinase complex)
Product does not compete with ATP.
Reversible: no
Target IC50: 500 nM against 20S proteasome; 10 µM against NF-κB activation

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution in DMSO, aliquot and freeze (-20°C). DMSO stock solutions are stable for up to 1 month at -20°C. Unstable in aqueous solutions; reconstitute in H₂O just prior to use.

Other Notes

Keyomarsi, K., et al. 2011. Cell. Biol. Toxicol.27, 123.
Adams, J., and Stein, R. 1996. Ann. Rep. Med. Chem.31, 279.
Dick, L.R., et al. 1996. J. Biol. Chem.271, 7273.
Oda, K., et al. 1996. Biochem. Biophys. Res.Commun.219, 800.
Fenteany, G., et al. 1995. Science268, 726.
Imajoh-Ohmi, S., et al. 1995. Biochem.Biophys. Res. Commun.217, 1070.
Jensen, T.J., et al. 1995. Cell 83, 129.
Katagiri, M.M., et al. 1995. J. Antibiot.48, 344.
Mori, S., et al. 1995. J. Biol. Chem.270, 29447.
Tanaka, H., et al. 1995. Biochem. Biophys. Res. Commun.216, 291.
Fenteany, G., et al. 1994. Proc. Natl. Acad.Sci. USA91, 3358.
Omura, S., et al. 1991. J. Antibiot.44, 117.

Legal Information

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

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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