Merck, 208902-500UG, Calpastatin Peptide

General description
A 27-amino acid, cell-permeable peptide encoded by exon 1B of human calpastatin that acts as a potent inhibitor of calpain I and calpain II (IC₅₀ = 20 nM for purified rabbit calpain II). Does not inhibit either papain or trypsin. Blocks the down-regulation of protein kinase Cε (PKCε) in rat pituitary GH₄C₁ cells stimulated by thyrotropin-releasing hormone (TRH).
A 27-amino acid, peptide encoded by exon 1B of human calpastatin that acts as a cell-permeable and potent inhibitor of calpain I and calpain II (IC₅₀ = 20 nM for purified rabbit calpain II). Does not inhibit either papain or trypsin. Blocks the down-regulation of protein kinase Cε (PKCε) in rat pituitary GH4C1 cells stimulated by thyrotropin-releasing hormone (TRH).
Biochem/physiol Actions
Product does not compete with ATP.
Reversible: no
Target IC₅₀: 20 nM against calpain II
Cell permeable: yes
Primary Target
calpain 2
Physical form
Supplied as a trifluoroacetate salt.
Preparation Note
Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.
Other Notes
Ac-Asp-Pro-Met-Ser-Ser-Thr-Tyr-Ile-Glu-Glu-Leu-Gly-Lys-Arg-Glu-Val-Thr-Ile-Pro-Pro-Lys-Tyr-Arg-Glu-Leu-Leu-Ala-NH₂
Eto, A., et al. 1995. J. Biol. Chem. 270, 25115.
Kawasaki, J., et al. 1989. J. Biochem. 106, 274.
Maki, M., et al. 1989. J. Biol. Chem. 264, 18866.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Standard Handling (A)