Nsp9 protein from SARS-coronavirus.

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The Nsp9 Replicase Protein of Sars-Coronavirus, Structure and Functional Insights

Sutton, G.Fry, E.Carter, L.Sainsbury, S.Walter, T.Nettleship, J.Berrow, N.Owens, R.Gilbert, R.Davidson, A.Siddell, S.Poon, L.L.M.Diprose, J.Alderton, D.Walsh, M.Grimes, J.M.Stuart, D.I.

(2004) Structure 12: 341

  • DOI: https://doi.org/10.1016/j.str.2004.01.016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    As part of a high-throughput structural analysis of SARS-coronavirus (SARS-CoV) proteins, we have solved the structure of the non-structural protein 9 (nsp9). This protein, encoded by ORF1a, has no designated function but is most likely involved with viral RNA synthesis. The protein comprises a single beta-barrel with a fold previously unseen in single domain proteins. The fold superficially resembles an OB-fold with a C-terminal extension and is related to both of the two subdomains of the SARS-CoV 3C-like protease (which belongs to the serine protease superfamily). nsp9 has, presumably, evolved from a protease. The crystal structure suggests that the protein is dimeric. This is confirmed by analytical ultracentrifugation and dynamic light scattering. We show that nsp9 binds RNA and interacts with nsp8, activities that may be essential for its function(s).

  • Organizational Affiliation

    Division of Structural Biology, The Henry Wellcome Building for Genomic Medicine, Oxford University, Roosevelt Drive, Oxford OX3 7BN, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NSP9143SARS coronavirus HKU-39849Mutation(s): 0 
Find proteins for P0C6X7 (Severe acute respiratory syndrome coronavirus)
Explore P0C6X7 
Go to UniProtKB:  P0C6X7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C6X7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 
  • Space Group: P 43 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58α = 90
b = 58β = 90
c = 85γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-02-20
    Type: Initial release
  • Version 1.1: 2015-02-11
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2019-05-08
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Other