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The Molecular Mechanism of Transport by the Mitochondrial ADP/ATP Carrier

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Ruprecht, Jonathan J., King, Martin S., Zögg, Thomas, Aleksandrova, Antoniya A., Pardon, Els, Crichton, Paul G., Steyaert, Jan, Kunji, Edmund R.S.·2019·Cell

Abstract

Mitochondrial ADP/ATP carriers transport ADP into the mitochondrial matrix for ATP synthesis, and ATP out to fuel the cell, by cycling between cytoplasmic-open and matrix-open states. The structure of the cytoplasmic-open state is known, but it has proved difficult to understand the transport mechanism in the absence of a structure in the matrix-open state. Here, we describe the structure of the matrix-open state locked by bongkrekic acid bound in the ADP/ATP-binding site at the bottom of the central cavity. The cytoplasmic side of the carrier is closed by conserved hydrophobic residues, and a salt bridge network, braced by tyrosines. Glycine and small amino acid residues allow close-packing of helices on the matrix side. Uniquely, the carrier switches between states by rotation of its three domains about a fulcrum provided by the substrate-binding site. Because these features are highly conserved, this mechanism is likely to apply to the whole mitochondrial carrier family. VIDEO ABSTRACT.

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Metadata

Authors
Ruprecht, J. J., King, M. S., Zögg, T., Aleksandrova, A. A., Pardon, E., Crichton, P. G., Steyaert, J., & Kunji, E. R. S.
Venue
Cell
Publisher
Elsevier BV
Published
2019-01
Volume
176
Issue
3
Pages
435-447.e15
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2907890950
Cited by
319
References
51
FWCI
11.46
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The Molecular Mechanism of Transport by the Mitochondrial ADP/ATP Carrier. https://app.cochat.ai/papers/10.1016/j.cell.2018.11.025
The paper
Ruprecht, J. J., King, M. S., Zögg, T., Aleksandrova, A. A., Pardon, E., Crichton, P. G., Steyaert, J., & Kunji, E. R. S. (2019). The Molecular Mechanism of Transport by the Mitochondrial ADP/ATP Carrier. Cell. https://doi.org/10.1016/j.cell.2018.11.025

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