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Structure paper

TitleAntiviral drug recognition and elevator-type transport motions of CNT3.
Journal, issue, pagesNat Chem Biol, Year 2024
Publish dateFeb 28, 2024
AuthorsNicholas J Wright / Feng Zhang / Yang Suo / Lingyang Kong / Ying Yin / Justin G Fedor / Kedar Sharma / Mario J Borgnia / Wonpil Im / Seok-Yong Lee /
PubMed AbstractNucleoside 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 linksNat Chem Biol / PubMed:38418906
MethodsEM (single particle)
Resolution2.31 - 6.92 Å
Structure data

EMDB-41730, PDB-8tz1:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Ribavirin
Method: EM (single particle) / Resolution: 2.54 Å

EMDB-41731, PDB-8tz2:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in MSP2N2 nanodiscs, apo state
Method: EM (single particle) / Resolution: 2.8 Å

EMDB-41732, PDB-8tz3:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with GS-441524, consensus reconstruction
Method: EM (single particle) / Resolution: 2.31 Å

EMDB-41733, PDB-8tz4:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with GS-441524, subset reconstruction
Method: EM (single particle) / Resolution: 3.23 Å

EMDB-41734, PDB-8tz5:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with N-hydroxycytidine
Method: EM (single particle) / Resolution: 2.74 Å

EMDB-41735, PDB-8tz6:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with PSI-6206
Method: EM (single particle) / Resolution: 2.69 Å

EMDB-41736, PDB-8tz7:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT1-INT1-INT1 conformation
Method: EM (single particle) / Resolution: 3.0 Å

EMDB-41737, PDB-8tz8:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT1-INT1-INT3 conformation
Method: EM (single particle) / Resolution: 3.19 Å

EMDB-41738, PDB-8tz9:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT2-INT2-INT2 conformation
Method: EM (single particle) / Resolution: 3.67 Å

EMDB-41739, PDB-8tza:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT2-INT1-INT1 conformation
Method: EM (single particle) / Resolution: 3.43 Å

EMDB-41740: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, consensus reconstruction
Method: EM (single particle) / Resolution: 2.8 Å

EMDB-41741: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-OFS conformation
Method: EM (single particle) / Resolution: 6.92 Å

EMDB-41742: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-INT1 conformation
Method: EM (single particle) / Resolution: 4.16 Å

EMDB-41743: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-OFS-INT3 conformation
Method: EM (single particle) / Resolution: 5.72 Å

EMDB-41744: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT1-INT1-OFS conformation (from ensemble analysis)
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-41745: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-OFS conformation
Method: EM (single particle) / Resolution: 4.28 Å

EMDB-41746: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-INT1 conformation
Method: EM (single particle) / Resolution: 3.47 Å

EMDB-41747: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT3-INT3-INT3 conformation
Method: EM (single particle) / Resolution: 4.3 Å

EMDB-41748: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-INT1-INT3 (clockwise) conformation
Method: EM (single particle) / Resolution: 3.87 Å

EMDB-41749: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, OFS-INT1-INT3 (counterclockwise) conformation
Method: EM (single particle) / Resolution: 3.68 Å

EMDB-41750: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT2-INT2-INT1 conformation
Method: EM (single particle) / Resolution: 3.49 Å

EMDB-41751: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, INT1-INT1-INT1 conformation
Method: EM (single particle) / Resolution: 3.45 Å

EMDB-41752: Cryo-EM reconstruction of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 2, consensus reconstruction
Method: EM (single particle) / Resolution: 2.99 Å

EMDB-41755, PDB-8tzd:
Cryo-EM structure of bovine concentrative nucleoside transporter 3 in complex with Molnupiravir, condition 1, INT1-INT1-OFS conformation (3DVA analysis)
Method: EM (single particle) / Resolution: 3.2 Å

Chemicals

ChemComp-RBV:
1-(beta-D-ribofuranosyl)-1H-1,2,4-triazole-3-carboxamide / medication, antivirus*YM / Ribavirin

ChemComp-NA:
Unknown entry

ChemComp-LBN:
1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine / phospholipid*YM / POPC

ChemComp-HOH:
WATER / Water

ChemComp-U08:
(2~{R},3~{R},4~{S},5~{R})-2-(4-azanylpyrrolo[2,1-f][1,2,4]triazin-7-yl)-5-(hydroxymethyl)-3,4-bis(oxidanyl)oxolane-2-carbonitrile / antivirus*YM / GS-441524


ChemComp, No image

ChemComp-U56:
Unknown entry


ChemComp, No image

ChemComp-U7I:
Unknown entry


ChemComp, No image

ChemComp-XMO:
Unknown entry

Source
  • bos taurus (cattle)
KeywordsTRANSPORT PROTEIN / membrane protein / transporter / nucleoside

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