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Title | Antiviral drug recognition and elevator-type transport motions of CNT3. |
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Journal, issue, pages | Nat Chem Biol, Vol. 20, Issue 9, Page 1144-1153, Year 2024 |
Publish date | Feb 28, 2024 |
Authors | Nicholas J Wright / Feng Zhang / Yang Suo / Lingyang Kong / Ying Yin / Justin G Fedor / Kedar Sharma / Mario J Borgnia / Wonpil Im / Seok-Yong Lee / |
PubMed Abstract | Nucleoside analogs have broad clinical utility as antiviral drugs. Key to their systemic distribution and cellular entry are human nucleoside transporters. Here, we establish that the human ...Nucleoside analogs have broad clinical utility as antiviral drugs. Key to their systemic distribution and cellular entry are human nucleoside transporters. Here, we establish that the human concentrative nucleoside transporter 3 (CNT3) interacts with antiviral drugs used in the treatment of coronavirus infections. We report high-resolution single-particle cryo-electron microscopy structures of bovine CNT3 complexed with antiviral nucleosides N-hydroxycytidine, PSI-6206, GS-441524 and ribavirin, all in inward-facing states. Notably, we found that the orally bioavailable antiviral molnupiravir arrests CNT3 in four distinct conformations, allowing us to capture cryo-electron microscopy structures of drug-loaded outward-facing and drug-loaded intermediate states. Our studies uncover the conformational trajectory of CNT3 during membrane transport of a nucleoside analog antiviral drug, yield new insights into the role of interactions between the transport and the scaffold domains in elevator-like domain movements during drug translocation, and provide insights into the design of nucleoside analog antiviral prodrugs with improved oral bioavailability. |
External links | Nat Chem Biol / PubMed:38418906 |
Methods | EM (single particle) |
Resolution | 2.31 - 6.92 Å |
Structure data | EMDB-41730, PDB-8tz1: EMDB-41731, PDB-8tz2: EMDB-41732, PDB-8tz3: EMDB-41733, PDB-8tz4: EMDB-41734, PDB-8tz5: EMDB-41735, PDB-8tz6: EMDB-41736, PDB-8tz7: EMDB-41737, PDB-8tz8: EMDB-41738, PDB-8tz9: EMDB-41739, PDB-8tza: EMDB-41740: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, consensus reconstruction EMDB-41741: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-OFS conformation EMDB-41742: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-INT1 conformation EMDB-41743: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-INT3 conformation EMDB-41744: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT1-INT1-OFS conformation (from ensemble analysis) EMDB-41745: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-OFS conformation EMDB-41746: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-INT1 conformation EMDB-41747: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-INT3 conformation EMDB-41748: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-INT1-INT3 (clockwise) conformation EMDB-41749: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-INT1-INT3 (counterclockwise) conformation EMDB-41750: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT2-INT2-INT1 conformation EMDB-41751: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT1-INT1-INT1 conformation EMDB-41752: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, consensus reconstruction EMDB-41755, PDB-8tzd: |
Chemicals | ChemComp-RBV: ChemComp-NA: ChemComp-LBN: ChemComp-HOH: ChemComp-U08:
ChemComp-U56:
ChemComp-U7I:
ChemComp-XMO: |
Source |
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Keywords | TRANSPORT PROTEIN / membrane protein / transporter / nucleoside |