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TRPV1 structures in distinct conformations reveal activation mechanisms

Author

Listed:
  • Erhu Cao

    (University of California)

  • Maofu Liao

    (Keck Advanced Microscopy Laboratory, University of California)

  • Yifan Cheng

    (Keck Advanced Microscopy Laboratory, University of California)

  • David Julius

    (University of California)

Abstract

Transient receptor potential (TRP) channels are polymodal signal detectors that respond to a wide range of physical and chemical stimuli. Elucidating how these channels integrate and convert physiological signals into channel opening is essential to understanding how they regulate cell excitability under normal and pathophysiological conditions. Here we exploit pharmacological probes (a peptide toxin and small vanilloid agonists) to determine structures of two activated states of the capsaicin receptor, TRPV1. A domain (consisting of transmembrane segments 1–4) that moves during activation of voltage-gated channels remains stationary in TRPV1, highlighting differences in gating mechanisms for these structurally related channel superfamilies. TRPV1 opening is associated with major structural rearrangements in the outer pore, including the pore helix and selectivity filter, as well as pronounced dilation of a hydrophobic constriction at the lower gate, suggesting a dual gating mechanism. Allosteric coupling between upper and lower gates may account for rich physiological modulation exhibited by TRPV1 and other TRP channels.

Suggested Citation

  • Erhu Cao & Maofu Liao & Yifan Cheng & David Julius, 2013. "TRPV1 structures in distinct conformations reveal activation mechanisms," Nature, Nature, vol. 504(7478), pages 113-118, December.
    • Handle: RePEc:nat:nature:v:504:y:2013:i:7478:d:10.1038_nature12823
    DOI: 10.1038/nature12823
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    Cited by:

    1. Michael J. Maxwell & Chris Thekkedam & Cedric Lamboley & Yanni K.-Y. Chin & Theo Crawford & Jennifer J. Smith & Junyu Liu & Xinying Jia & Irina Vetter & Derek R. Laver & Bradley S. Launikonis & Angela, 2023. "A bivalent remipede toxin promotes calcium release via ryanodine receptor activation," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Arthur Neuberger & Kirill D. Nadezhdin & Alexander I. Sobolevsky, 2021. "Structural mechanisms of TRPV6 inhibition by ruthenium red and econazole," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    3. Ruth A. Pumroy & Anna D. Protopopova & Tabea C. Fricke & Iris U. Lange & Ferdinand M. Haug & Phuong T. Nguyen & Pamela N. Gallo & Bárbara B. Sousa & Gonçalo J. L. Bernardes & Vladimir Yarov-Yarovoy & , 2022. "Structural insights into TRPV2 activation by small molecules," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    4. Heng Zhang & Jia-Jia Lin & Ya-Kai Xie & Xiu-Zu Song & Jia-Yi Sun & Bei-Lei Zhang & Yun-Kun Qi & Zhen-Zhong Xu & Fan Yang, 2023. "Structure-guided peptide engineering of a positive allosteric modulator targeting the outer pore of TRPV1 for long-lasting analgesia," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    5. Barbara Storti & Carmine Di Rienzo & Francesco Cardarelli & Ranieri Bizzarri & Fabio Beltram, 2015. "Unveiling TRPV1 Spatio-Temporal Organization in Live Cell Membranes," PLOS ONE, Public Library of Science, vol. 10(3), pages 1-17, March.
    6. Do Hoon Kwon & Feng Zhang & Justin G. Fedor & Yang Suo & Seok-Yong Lee, 2022. "Vanilloid-dependent TRPV1 opening trajectory from cryoEM ensemble analysis," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    7. Maxim V Nikolaev & Natalia A Dorofeeva & Margarita S Komarova & Yuliya V Korolkova & Yaroslav A Andreev & Irina V Mosharova & Eugene V Grishin & Denis B Tikhonov & Sergey A Kozlov, 2017. "TRPV1 activation power can switch an action mode for its polypeptide ligands," PLOS ONE, Public Library of Science, vol. 12(5), pages 1-16, May.
    8. Arthur Neuberger & Mai Oda & Yury A. Nikolaev & Kirill D. Nadezhdin & Elena O. Gracheva & Sviatoslav N. Bagriantsev & Alexander I. Sobolevsky, 2023. "Human TRPV1 structure and inhibition by the analgesic SB-366791," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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