9Q1J image
Deposition Date 2025-08-14
Release Date 2025-09-24
Last Version Date 2025-10-15
Entry Detail
PDB ID:
9Q1J
Keywords:
VIRAL PROTEIN
Title:
Cryo-EM structure of SARS-CoV-2 nsp10-nsp14 E191A mutant-T20P14-R complex
Biological Source:
Source Organism:
Severe acute respiratory syndrome coronavirus 2 (Taxon ID: 2697049)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
2.81 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
9Q1J validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Non-structural protein 10
Gene (Uniprot):rep
Chain IDs:A, C, G, I
Chain Length:139
Number of Molecules:4
Biological Source:Severe acute respiratory syndrome coronavirus 2
UniProt ID:P0DTD1 Pfam ID:PF09401, PF06471 EC:2.7.7.48
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Proofreading exoribonuclease
Gene (Uniprot):rep
Mutagens:E191A
Chain IDs:B, D, H, J
Chain Length:527
Number of Molecules:4
Biological Source:Severe acute respiratory syndrome coronavirus 2
UniProt ID:P0DTD1 Pfam ID:PF09401, PF06471 EC:2.7.7.48
Polymer Type:polyribonucleotide
Molecule:T20P14-R RNA
Chain IDs:E, K
Chain Length:39
Number of Molecules:2
Biological Source:Severe acute respiratory syndrome coronavirus 2
Polymer Type:polyribonucleotide
Molecule:RNA (5'-R(*A*UP*UP*CP*CP*CP*C)-3')
Chain IDs:F, L
Chain Length:7
Number of Molecules:2
Biological Source:Severe acute respiratory syndrome coronavirus 2
Ligand Molecules
MG
ZN
Primary Citation
Molecular basis of SARS-CoV-2 proofreading enzyme-mediated resistance to remdesivir.
Proc.Natl.Acad.Sci.USA 122 e2519755122 e2519755122 (2025)
PMID: 41032524 DOI: 10.1073/pnas.2519755122

Abstact

SARS-CoV-2's remarkable resistance to nucleotide analog antivirals such as remdesivir, which thwarts RNA synthesis by inhibiting viral polymerase (RdRp), challenges available therapies. We reveal that remdesivir incorporation destabilizes RdRp-RNA complex while enhancing RNA binding to the proofreading exoribonuclease (ExoN), facilitating remdesivir excision. Conserved ExoN determinants for remdesivir recognition and excision underpin ExoN-mediated resistance across all coronaviruses. These findings inform the design of next-generation antivirals and combination therapies capable of overcoming ExoN-mediated resistance.

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Disease

Primary Citation of related structures
9Q1J
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