Proteasome Inhibitor I

Biochem/physiol Actions

Reversible: yes

Product does not compete with ATP.

Primary TargetChymotrypsin-like activity of the multicatalytic proteinase complex (MCP; 20S proteasome) in HT4 cells

Cell permeable: yes

General description

A cell-permeable, reversible inhibitor of the chymotrypsin-like activity of the multicatalytic proteinase complex (MCP; 20S proteasome) in HT4 cells. Causes the accumulation of ubiquitinated proteins in neuronal cells. Prevents the activation of NF-κB in response to TNF-α and Okadaic Acid (Cat. No. 495604) through inhibition of IκB-α degradation. A 50 mM (5 mg/162 µl) solution of Proteasome Inhibitor I (Cat. No. 539161) in DMSO is also available.

Cell-permeable inhibitor of the chymotrypsin-like activity of the multicatalytic proteinase complex (MCP; 20S proteasome) in HT4 cells. Causes the accumulation of ubiquitinylated proteins in neuronal cells. Prevents NF-κB activation in response to TNFα and okadaic acid through inhibition of IκB-α degradation, thereby interfering with induction of iNOS in macrophages.

Legal Information

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

Other Notes

Griscavage, J.M., et al. 1996. Proc. Natl. Acad. Sci. USA93, 3308.Mori, S., et al. 1995. J. Biol. Chem.270, 29447.Figueiredo-Pereira, M.E., et al. 1994. J. Neurochem. 63, 1578.Traenckner, E.B., et al. 1994. EMBO J. 13, 5433.

Packaging

1, 5 mg in Plastic ampoule

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). DMSO stock solutions are stable for up to 3 months at -20°C.

Sequence

Z-Ile-Glu(OtBu)-Ala-Leu-CHO

Warning

Toxicity: Standard Handling (A)