Bridges, Hannah R, Fedor, Justin G, Blaza, James N orcid.org/0000-0001-5420-2116 et al. (9 more authors) (2020) Structure of inhibitor-bound mammalian complex I. Nature Communications. 5261. ISSN 2041-1723
Abstract
Respiratory complex I (NADH:ubiquinone oxidoreductase) captures the free energy from oxidising NADH and reducing ubiquinone to drive protons across the mitochondrial inner membrane and power oxidative phosphorylation. Recent cryo-EM analyses have produced near-complete models of the mammalian complex, but leave the molecular principles of its long-range energy coupling mechanism open to debate. Here, we describe the 3.0-Å resolution cryo-EM structure of complex I from mouse heart mitochondria with a substrate-like inhibitor, piericidin A, bound in the ubiquinone-binding active site. We combine our structural analyses with both functional and computational studies to demonstrate competitive inhibitor binding poses and provide evidence that two inhibitor molecules bind end-to-end in the long substrate binding channel. Our findings reveal information about the mechanisms of inhibition and substrate reduction that are central for understanding the principles of energy transduction in mammalian complex I.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 26 Oct 2020 12:30 |
Last Modified: | 23 Jan 2025 00:24 |
Published Version: | https://doi.org/10.1038/s41467-020-18950-3 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41467-020-18950-3 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:167205 |