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Structural bases of TRP channel TRPV6 allosteric modulation by 2-APB

Author

Listed:
  • Appu K. Singh

    (Columbia University)

  • Kei Saotome

    (Columbia University)

  • Luke L. McGoldrick

    (Columbia University
    Molecular and Biomedical Studies, Columbia University)

  • Alexander I. Sobolevsky

    (Columbia University)

Abstract

Transient receptor potential (TRP) channels are involved in various physiological processes, including sensory transduction. The TRP channel TRPV6 mediates calcium uptake in epithelia and its expression is dramatically increased in numerous types of cancer. TRPV6 inhibitors suppress tumor growth, but the molecular mechanism of inhibition remains unknown. Here, we present crystal and cryo-EM structures of human and rat TRPV6 bound to 2-aminoethoxydiphenyl borate (2-APB), a TRPV6 inhibitor and modulator of numerous TRP channels. 2-APB binds to TRPV6 in a pocket formed by the cytoplasmic half of the S1–S4 transmembrane helix bundle. Comparing human wild-type and high-affinity mutant Y467A structures, we show that 2-APB induces TRPV6 channel closure by modulating protein–lipid interactions. Mutagenesis and functional analyses suggest that the identified 2-APB binding site might be present in other members of vanilloid subfamily TRP channels. Our findings reveal a mechanism of ion channel allosteric modulation that can be exploited for therapeutic design.

Suggested Citation

  • Appu K. Singh & Kei Saotome & Luke L. McGoldrick & Alexander I. Sobolevsky, 2018. "Structural bases of TRP channel TRPV6 allosteric modulation by 2-APB," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04828-y
    DOI: 10.1038/s41467-018-04828-y
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    Cited by:

    1. 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.
    2. 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.
    3. Arthur Neuberger & Yury A. Trofimov & Maria V. Yelshanskaya & Jeffrey Khau & Kirill D. Nadezhdin & Lena S. Khosrof & Nikolay A. Krylov & Roman G. Efremov & Alexander I. Sobolevsky, 2023. "Molecular pathway and structural mechanism of human oncochannel TRPV6 inhibition by the phytocannabinoid tetrahydrocannabivarin," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    4. Arthur Neuberger & Yury A. Trofimov & Maria V. Yelshanskaya & Kirill D. Nadezhdin & Nikolay A. Krylov & Roman G. Efremov & Alexander I. Sobolevsky, 2023. "Structural mechanism of human oncochannel TRPV6 inhibition by the natural phytoestrogen genistein," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    5. 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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