General description
A cell-permeable hydroxyethylene dipeptide isostere that acts as a potent and highly specific inhibitor of γ-secretase (Aβ total IC50 = 17 nM; Aβ40 IC50 = 48 nM; and Aβ42 IC50 = 67 nM in SH-SY5Y cells overexpressing spβA4CTF). Binds to presenilin and blocks Notch intracellular domain production. Also reported to block the formation of εCTF, resulting in the accumulation of α- and βCTF. Functions as a transition state analog mimic at the catalytic site of an aspartyl protease, however, it exhibits over 100-fold greater selectivity for γ-secretase than for cathepsin D.
Biochem/physiol Actions
Cell permeable: yes
Primary Target
Aβtotal
Product does not compete with ATP.
Reversible: no
Target IC50: Aβtotal 17 nM, Aβ40 48 nM, and Aβ42 67 nM in SHSY5Y cells overexpressing spβA4CTF
Packaging
Packaged under inert gas
Physical form
A 1 mM (250 µg in 372 µl or 500 µg in 744 µl) solution in DMSO.
Preparation Note
Following initial thaw, aliquot and freeze (-20°C).
Other Notes
Weidemann, A., et al. 2002. Biochemistry41, 2825.
Doerfler, P., et al. 2001. Proc. Natl. Acad. Sci. USA98, 9312.
Li, Y.M., et al. 2000. Proc. Natl. Acad. Sci. USA97, 6138.
Shearman, M.S., et al. 2000. Biochemistry39, 8698.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Standard Handling (A)
| Quality Segment | 100 |
| assay | ≥90% (HPLC) |
| form | liquid |
| manufacturer/tradename | Calbiochem® |
| storage condition | protect from light,OK to freeze,desiccated |
| shipped in | ambient |
| storage temp. | −20°C |
