Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity

Dehez F, Schanda P, King MS, Kunji ERS, Chipot C. 2017. Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity. Biophysical Journal. 113(11), 2311–2315.

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Journal Article | Published | English
Author
Dehez, François; Schanda, PaulIST Austria ; King, Martin S.; Kunji, Edmund R.S.; Chipot, Christophe
Abstract
Biophysical investigation of membrane proteins generally requires their extraction from native sources using detergents, a step that can lead, possibly irreversibly, to protein denaturation. The propensity of dodecylphosphocholine (DPC), a detergent widely utilized in NMR studies of membrane proteins, to distort their structure has been the subject of much controversy. It has been recently proposed that the binding specificity of the yeast mitochondrial ADP/ATP carrier (yAAC3) toward cardiolipins is preserved in DPC, thereby suggesting that DPC is a suitable environment in which to study membrane proteins. In this communication, we used all-atom molecular dynamics simulations to investigate the specific binding of cardiolipins to yAAC3. Our data demonstrate that the interaction interface observed in a native-like environment differs markedly from that inferred from an NMR investigation in DPC, implying that in this detergent, the protein structure is distorted. We further investigated yAAC3 solubilized in DPC and in the milder dodecylmaltoside with thermal-shift assays. The loss of thermal transition observed in DPC confirms that the protein is no longer properly folded in this environment.
Keywords
Publishing Year
Date Published
2017-12-05
Journal Title
Biophysical Journal
Volume
113
Issue
11
Page
2311-2315
ISSN
IST-REx-ID

Cite this

Dehez F, Schanda P, King MS, Kunji ERS, Chipot C. Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity. Biophysical Journal. 2017;113(11):2311-2315. doi:10.1016/j.bpj.2017.09.019
Dehez, F., Schanda, P., King, M. S., Kunji, E. R. S., & Chipot, C. (2017). Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity. Biophysical Journal. Elsevier. https://doi.org/10.1016/j.bpj.2017.09.019
Dehez, François, Paul Schanda, Martin S. King, Edmund R.S. Kunji, and Christophe Chipot. “Mitochondrial ADP/ATP Carrier in Dodecylphosphocholine Binds Cardiolipins with Non-Native Affinity.” Biophysical Journal. Elsevier, 2017. https://doi.org/10.1016/j.bpj.2017.09.019.
F. Dehez, P. Schanda, M. S. King, E. R. S. Kunji, and C. Chipot, “Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity,” Biophysical Journal, vol. 113, no. 11. Elsevier, pp. 2311–2315, 2017.
Dehez F, Schanda P, King MS, Kunji ERS, Chipot C. 2017. Mitochondrial ADP/ATP carrier in dodecylphosphocholine binds cardiolipins with non-native affinity. Biophysical Journal. 113(11), 2311–2315.
Dehez, François, et al. “Mitochondrial ADP/ATP Carrier in Dodecylphosphocholine Binds Cardiolipins with Non-Native Affinity.” Biophysical Journal, vol. 113, no. 11, Elsevier, 2017, pp. 2311–15, doi:10.1016/j.bpj.2017.09.019.

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