539160

Proteasome Inhibitor I

The Proteasome Inhibitor I controls the biological activity of Proteasome. This small molecule/inhibitor is primarily used for Protease Inhibitors applications.

• Synonym(s): Proteasome Inhibitor I, PSI
• Empirical Formula (Hill Notation): C₃₂H₅₀N₄O₈
• Molecular Weight: 618.76
• NACRES: NA.77
• UNSPSC Code: 12352202
• Assay: ≥90% (HPLC)
• Form: solid
• Storage condition: OK to freeze

Properties

• Quality Segment: 100
• assay: ≥90% (HPLC)
• form: solid
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze
• color: white
• solubility: DMSO: 30 mg/mL, ethanol: 30 mg/mL, methanol: soluble
• shipped in: ambient
• storage temp.: −20°C

Description

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.

Biochem/physiol Actions

Cell permeable: yes

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

Product does not compete with ATP.

Reversible: yes

Preparation Note

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

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.

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

Legal Information

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

Disclaimer

Toxicity: Standard Handling (A)

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable