Pepstatin A (Pepstatin) is a specific inhibitor of aspartic proteases produced by actinomycetes, which can inhibit hemoglobin-pepsin, hemoglobin-proctase, casein-pepsin, casein-proctase, casein-acid protease and hemoglobin-acid protease with IC50 values of 4.5 nM, 6.2 nM, 150 nM, 290 nM, 520 nM and 260 nM, respectively. Pepstatin also inhibits HIV protease.
| Molecular Weight | 685.89 |
| Formula | C34H63N5O9 |
| CAS Number | 26305-03-3 |
| Solubility (25°C) | DMSO ≥ 25 mg/mL |
| Storage | Store at ≤-20°C, dry, sealed |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[3] Marciniszyn J Jr, et al. J Biol Chem. Mode of inhibition of acid proteases by pepstatin.
| Related Cathepsin Products |
|---|
| Z-Gly-Pro-Arg-AMC hydrochloride
Z-Gly-Pro-Arg-AMC hydrochloride a fluorescent trypsin and cathepsin K substrate. |
| N-CBZ-Phe-Arg-AMC
N-CBZ-Phe-Arg-AMC (Z-FR-AMC) is a cathepsin substrate used in assessment activity of lysosomal cathepsin enzymes. |
| Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2
Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2 is a cathepsin D substrate, that can be used for cathepsin D FRET assay. |
| (S, S)-Z-FA-FMK
(S,S)-Z-FA-FMK is a cell-permeable, irreversible cathepsin B inhibitor. |
| H-Pro-Thr-Glu-Phe-p-nitro-Phe-Arg-Leu-OH
H-Pro-Thr-Glu-Phe-p-nitro-Phe-Arg-Leu-OH is a water-soluble polypeptide that can serve as a substrate for cathepsin D, pepsin and pepsinogen. |
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