Ac-Asp-Met-Gln-Asp-pNA (Caspase 3 (Apopain) Substrate)

Product Number: 860-25


SKU: 860-25 Category: Tags: ,

Molecular Weight: 669.21
Salt Form: TFA
Purity: >96%
Sequence (3-letter): Ac-Asp-Met-Gln-Asp-pNA
Sequence (1-letter): Ac-DMQD-pNA
Storage: -20 °C or below

Ac-Asp-Met-Gln-Asp-pNA is a colorimetric substrate for Caspase 3 (Apopain). Caspase 3 is a cysteine protease that is rapidly activated during apoptosis and that cleaves several substrates, including poly(ADP-ribose) polymerase (PARP). Caspase 3 is activated by Caspases 8, 9 and 10 and cleaves and activates caspase 6 and 7. Caspase 3 cleaves the amyloid precursor protein (APP) contributing to Amyloid beta formation and has been implicated in Alzheimer’s disease and proposed as a target for drug discovery.

Activity is quantified by the release of p-nitroaniline which is measured by absorbance at 405 nm.


1. Talanian, R.V. et al. (1997) “Substrate Specificities of Caspase Family Proteases” J. Biol. Chem. 272 (15): 9677–9682.
2.Nagane, M. et al. (1998) “Drug resistance of human glioblastoma cells conferred by a tumor-specific mutant epidermal growth factor receptor through modulation of Bcl-XL and caspase-3-like proteases” Proc. Natl. Acad. Sci. USA 95 (10): 5724–5729.
3) Troy T. Rohn, Elizabeth Head “Caspases as Therapeutic Targets in Alzheimer’s Disease: Is It Time to “Cut” to the Chase?” Int J Clin Exp Pathol. 2009; 2(2): 108–118.

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Caspase, Enzyme Substrates

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