2BX3

Crystal Structure of SARS Coronavirus Main Proteinase (P43212)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Ph-Dependent Conformational Flexibility of the Sars-Cov Main Proteinase (M(Pro)) Dimer: Molecular Dynamics Simulations and Multiple X-Ray Structure Analyses.

Tan, J.Verschueren, K.H.G.Anand, K.Shen, J.Yang, M.Xu, Y.Rao, Z.Bigalke, J.Heisen, B.Mesters, J.R.Chen, K.Shen, X.Jiang, H.Hilgenfeld, R.

(2005) J Mol Biol 354: 25

  • DOI: 10.1016/j.jmb.2005.09.012
  • Primary Citation of Related Structures:  
    2BX4, 2BX3

  • PubMed Abstract: 
  • The SARS coronavirus main proteinase (M(pro)) is a key enzyme in the processing of the viral polyproteins and thus an attractive target for the discovery of drugs directed against SARS. The enzyme has been shown by X-ray crystallography to undergo significant pH-dependent conformational changes ...

    The SARS coronavirus main proteinase (M(pro)) is a key enzyme in the processing of the viral polyproteins and thus an attractive target for the discovery of drugs directed against SARS. The enzyme has been shown by X-ray crystallography to undergo significant pH-dependent conformational changes. Here, we assess the conformational flexibility of the M(pro) by analysis of multiple crystal structures (including two new crystal forms) and by molecular dynamics (MD) calculations. The MD simulations take into account the different protonation states of two histidine residues in the substrate-binding site and explain the pH-activity profile of the enzyme. The low enzymatic activity of the M(pro) monomer and the need for dimerization are also discussed.


    Organizational Affiliation

    Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MAIN PROTEINASEA306SARS coronavirus Sin2774Mutation(s): 0 
EC: 3.4.24 (PDB Primary Data), 3.4.19.12 (UniProt), 3.4.22.69 (UniProt), 3.4.22 (UniProt), 2.7.7.48 (UniProt), 3.6.4.12 (UniProt), 3.6.4.13 (UniProt), 2.1.1 (UniProt), 3.1.13 (UniProt), 3.1 (UniProt)
UniProt
Find proteins for P0C6X7 (Severe acute respiratory syndrome coronavirus)
Explore P0C6X7 
Go to UniProtKB:  P0C6X7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.180 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.675α = 90
b = 69.675β = 90
c = 100.197γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-09-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection