ROCHE Calpain Inhibitor IN-Acetyl-Leu-Leu-norleucinal synthetic

ROCHE Calpain Inhibitor IN-Acetyl-Leu-Leu-norleucinal synthetic

Stock Code: 2795519
Manufacturer Part No: 11086090001
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Application


Calpain inhibitor I inhibits calpain, which activates myosin light chain kinase and protein kinase C by partial proteolysis. The inhibitor should be membrane permeable due to low molecular weight and lack of charged residues.Calpain Inhibitor I is used for western blotting methods.


Formula variant


C20H37N3O4


General description


Calpain Inhibitor I is a strong, competitive inhibitor of the Ca2+-dependent neutral cysteine proteases calpain I and calpain II.


Other Notes


For life science research only. Not for use in diagnostic procedures.


Preparation Note


Working concentration: 0.1 - 10 µMThe suggested starting concentration is 17 µg/ml. This is the concentration at which half maximal inhibition of calpain I is observed.Working solution: Recommended solvent is DMF, ethanol, or methanol up to 10 mg/ml.Storage conditions (working solution): -15 to -25 °CSolutions in DMF, methanol, ethanol are stable for 4 weeks at -15 to -25 °C.


Quality


Purity: 98% (from C); chromatographically homogeneous


Reconstitution


Soluble in DMF, ethanol, or methanol to 10 mg/ml. For a stock solution, Roche recommends dissolving 1 mg of the inhibitor in 100 µl DMF, methanol, or ethanol. Before use, dilute with water or phosphate buffer (0.1 M, pH 7.5) to desired concentration. Solutions in DMF, ethanol, or methanol are stable for 2 to 3 days at 2 to 8 °C, and approximately 4 weeks at -15 to -25 °C. For best results, prepare solutions fresh before use.


Specificity


Calpain Inhibitor I is a strong, competitive inhibitor of the Ca2+-dependent neutral cysteine proteases calpain I (requiring 2–75 µM Ca2+ for activation) and calpain II (requiring 200–800 µM) with a Ki-value between 0.12 µM and 0.23 µM. Calpain II is inhibited to a lesser extent than calpain I. Calpain Inhibitor I is also a strong inhibitor of papain and cathepsin B and L. It shows only weak inhibition of cathepsin H and α-chymotrypsin and does not inhibit trypsin. ID50 for 0.02 U platelet calpain is 0.05 µM.

mp182 °C
InChI keyFMYKJLXRRQTBOR-BZSNNMDCSA-N
InChI1S/C20H37N3O4/c1-7-8-9-16(12-24)22-19(26)18(11-14(4)5)23-20(27)17(10-13(2)3)21-15(6)25/h12-14,16-18H,7-11H2,1-6H3,(H,21,25)(H,22,26)(H,23,27)/t16-,17-,18-/m0/s
Formpowder
Assay98% (chromatographically homogeneous)

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