5C3N

Crystal structure of MERS coronavirus main protease in spacegroup C2221

• PDB DOI: https://doi.org/10.2210/pdb5C3N/pdb

• Classification: HYDROLASE
• Organism(s): Middle East respiratory syndrome-related coronavirus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-06-17 Released: 2015-12-30 
• Deposition Author(s): Chou, C.Y., Cheng, S.C.
• Funding Organization(s): Ministry of Science and Technology

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.282 
• R-Value Work: 0.218 
• R-Value Observed: 0.221 

Literature

Critical Assessment of the Important Residues Involved in the Dimerization and Catalysis of MERS Coronavirus Main Protease.

Ho, B.L., Cheng, S.C., Shi, L., Wang, T.Y., Ho, K.I., Chou, C.Y.

(2015) PLoS One 10: e0144865-e0144865

• PubMed: 26658006 
• DOI: https://doi.org/10.1371/journal.pone.0144865
• Primary Citation of Related Structures:  
  5C3N


• PubMed Abstract: 
  

  A highly pathogenic human coronavirus (CoV), Middle East respiratory syndrome coronavirus (MERS-CoV), has emerged in Jeddah and other places in Saudi Arabia, and has quickly spread to European and Asian countries since September 2012. Up to the 1st October 2015 it has infected at least 1593 people with a global fatality rate of about 35%. Studies to understand the virus are necessary and urgent. In the present study, MERS-CoV main protease (Mpro) is expressed; the dimerization of the protein and its relationship to catalysis are investigated.

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Organizational Affiliation: 

Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei 112, Taiwan.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 66.71 kDa 
• Atom Count: 4,580 
• Modelled Residue Count: 601 
• Deposited Residue Count: 612 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ORF1a protein	A, B	306	Middle East respiratory syndrome-related coronavirus	Mutation(s): 0  Gene Names: orf1ab
UniProt
Find proteins for V9TU05 (Middle East respiratory syndrome-related coronavirus) Explore V9TU05  Go to UniProtKB:  V9TU05

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.282 
• R-Value Work: 0.218 
• R-Value Observed: 0.221 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 87.23	α = 90
b = 94.037	β = 90
c = 155.059	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Blu-Ice	data collection
HKL-2000	data processing
PHASER	model building
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2015-12-30 
Deposition Author(s): Chou, C.Y., Cheng, S.C.

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Funding Organization	Location	Grant Number
Ministry of Science and Technology	Taiwan	MOST 103-2320-B-010-025

Revision History  

• Version 1.0: 2015-12-30
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description