Lactacystin, Synthetic - CAS 1258004-00-0 - Calbiochem (C15-1209-725)

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

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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

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