Atractyloside is an inhibitor of the adenine nucleotide translocator (ANT). It is an extremely toxic glycoside that inhibits oxidative phosphorylation by blocking the transfer of adenosine nucleotides through the mitochondrial membrane.
Application in HRR
- Atr: Atractyloside (Atractyloside dipotassium salt, C30H44O16S2K2); Sigma A 6882, 250 mg, store at R.T.; M = 802.99 g·mol-1 containing 2.5 mol H2O/mol.
- Caution: very toxic.
- Preparation of 50 mM stock solution (dissolved in H20):
- Weigh 40.2 mg atractyloside.
- Dissolve in 1 ml H2O (it dissolves better in warm water).
- Divide into 0.2 ml aliquots.
- Store at -20 °C.
- » O2k manual titrations MiPNet09.12 O2k-Titrations
- Titration volume: 30 µl using a 50 µl syringe (2 ml O2k-chamber).
- Final concentration: 0.75 mM.
- Comment: With Atr, a very high concentration is required for full inhibition. Carboxyatractyloside (Cat) is considered to be much more specific than Atr, and the effective concentration required is much much lower.
MitoPedia topics: Inhibitor