Carboxyatractyloside: Difference between revisions
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{{MitoPedia | {{MitoPedia | ||
|abbr=Cat | |abbr=Cat | ||
|description='''Carboxyatractyloside''', Cat, is a highly selective and potent inhibitor of the [[adenine nucleotide translocator]] (ANT). Cat stabilizes the nucleoside binding site of ANT on the cytoplasmic side of the inner membrane and blocks the exchange of matrix ATP and cytoplasmic ADP. It causes stabilization of the ''c'' conformation ofย ANT leading to permeability transition pore (PTP) opening, loss ofย mitochondrial membrane potential, and apoptosis. | |description='''Carboxyatractyloside''', Cat, is a highly selective and potent inhibitor of the [[adenine nucleotide translocator]] (ANT). Cat stabilizes the nucleoside binding site of ANT on the cytoplasmic (positive) side of the inner membrane and blocks the exchange of matrix ATP and cytoplasmic ADP. It causes stabilization of the ''c'' conformation ofย ANT leading to permeability transition pore (PTP) opening, loss ofย mitochondrial membrane potential, and apoptosis. | ||
|info=[[MiPNet03.02]] | |info=[[MiPNet03.02]] | ||
|type=Inhibitor PS | |type=Inhibitor PS |
Revision as of 22:00, 4 August 2015
Description
Carboxyatractyloside, Cat, is a highly selective and potent inhibitor of the adenine nucleotide translocator (ANT). Cat stabilizes the nucleoside binding site of ANT on the cytoplasmic (positive) side of the inner membrane and blocks the exchange of matrix ATP and cytoplasmic ADP. It causes stabilization of the c conformation of ANT leading to permeability transition pore (PTP) opening, loss of mitochondrial membrane potential, and apoptosis.
Abbreviation: Cat
Reference: MiPNet03.02
MitoPedia topics: Inhibitor
Application in HRR
Cat: Carboxyatractyloside (carboxyatractyloside potassium salt from Xanthium sibiricum, C31H44O18S2*Kx); Sigma C 4992, 2 mg, store at -20 ยฐC; FW = 802.99 (free acid basis); Alternative source: Merck 216201-5MG (Calbiochem, Carboxyatractyloside potassium salt from Xanthium sibiricum, C31H43O18S2K3*3H2O), 5 mg, store at -20 ยฐC, FW = 939.1).
Caution: Chemicals stored in the fridge or freezer should be allowed to reach room temperature before opening. Very toxic!
Preparation of 5 mM stock solution (dissolved in H20):
- 1) Weigh 4.7 mg carboxyatractyloside.
- 2) Dissolve in 1 ml H2O.
- 3) Divide into 0.2 ml aliquots.
- 4) Store at -20 ยฐC.
O2k manual titrations >> MiPNet09.12 O2k-Titrations
- Titration volume: 2 ยตl using a 10 ยตl Hamilton syringe (2 ml O2k-chamber).
- Final concenteration: 5 ยตM.
Comment: Cat is considered to be much more specific than Atractyloside (Atr), and the effective concentration required is much much lower (ยตM). With Atr, a very high concentration (mM) is required for full inhibition.
* Talk:Carboxyatractyloside