219377

Cathepsin K Inhibitor I

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

• Synonym(s): Cathepsin K Inhibitor I, 1,3-Bis(CBZ-Leu-NH)-2-propanone, 1,3-Bis(N-carbobenzoyloxy-L-leucyl)amino Acetone
• Empirical Formula (Hill Notation): C₃₁H₄₂N₄O₇
• Molecular Weight: 582.69
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• Quality Level: 100
• assay: ≥95% (HPLC)
• form: lyophilized solid
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze
• color: off-white
• solubility: methanol: 1 mg/mL; DMSO: soluble
• shipped in: wet ice
• storage temp.: −20°C

Description

General description

A cell-permeable, symmetrical bis(acylamino)ketone compound that acts as a potent, selective, reversible inhibitor of cathepsin K (K_i, = 22 nM). Also shown to inhibit cathepsin K in stably transfected CHO cells (IC₅₀ = 134 nM). Reported to bind to cathepsin K and span both the S- and S′- subsites. Inhibits papain (K_i >10 µM), trypsin (K_i >50 µM), and chymotrypsin (K_i >50 µM) only at higher concentrations. Exhibits greater selectivity for cysteine proteases of the papain family (K_i = 340 nM, 890 nM, and 1-3 µM for cathepsin L, cathepsin S, and cathepsin B, respectively).

A cell-permeable, symmetrical bis(acylamino)ketone that acts as a potent, selective, and reversible inhibitor of cathepsin K (K_i,app = 22 nM). Shown to bind to cathepsin K and span both the S- and S′-subsites. A poor inhibitor of papain (K_i,app >10 µM) but displays greater selectivity towards other proteases of the papain family (K_i,app = 340 nM, 890 nM, and 1.3 µM for cathepsin L, cathepsin S, and cathepsin B respectively). Inhibits trypsin and chymotrypsin activities only at higher concentrations (K_i,app ≥ 50 µM).

Biochem/physiol Actions

Cell permeable: yes

Primary Target
cathepsin K

Product does not compete with ATP.

Reversible: yes

Target K_i: 22 nM against cathepsin K

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Sequence

Cbz-Leu-NH-CH₂-CO-CH₂-NH-Leu-Cbz

Reconstitution

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

Other Notes

Claveau, D., et al. 2000. Biochem. Pharmacol.60, 759.
LaLonde, J.M., et al. 1999. Biochemistry38, 862.
Yamashita, D.S., et al. 1997. J. Am. Chem. Soc.119, 11351.

Legal Information

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

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable