4RF0

Crystal structure of the Middle-East respiratory syndrome coronavirus papain-like protease in complex with ubiquitin (space group P6522)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.243 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal Structure of the Middle East Respiratory Syndrome Coronavirus (MERS-CoV) Papain-like Protease Bound to Ubiquitin Facilitates Targeted Disruption of Deubiquitinating Activity to Demonstrate Its Role in Innate Immune Suppression.

Bailey-Elkin, B.A., Knaap, R.C., Johnson, G.G., Dalebout, T.J., Ninaber, D.K., van Kasteren, P.B., Bredenbeek, P.J., Snijder, E.J., Kikkert, M., Mark, B.L.

(2014) J Biol Chem 289: 34667-34682

  • DOI: 10.1074/jbc.M114.609644
  • Primary Citation of Related Structures:  
    4REZ, 4RF0, 4RF1

  • PubMed Abstract: 

    • Middle East respiratory syndrome coronavirus (MERS-CoV) is a newly emerging human pathogen that was first isolated in 2012. MERS-CoV replication depends in part on a virus-encoded papain-like protease (PL(pro)) that cleaves the viral replicase polyproteins at three sites releasing non-structural protein 1 (nsp1), nsp2, and nsp3 ...

    Middle East respiratory syndrome coronavirus (MERS-CoV) is a newly emerging human pathogen that was first isolated in 2012. MERS-CoV replication depends in part on a virus-encoded papain-like protease (PL(pro)) that cleaves the viral replicase polyproteins at three sites releasing non-structural protein 1 (nsp1), nsp2, and nsp3. In addition to this replicative function, MERS-CoV PL(pro) was recently shown to be a deubiquitinating enzyme (DUB) and to possess deISGylating activity, as previously reported for other coronaviral PL(pro) domains, including that of severe acute respiratory syndrome coronavirus. These activities have been suggested to suppress host antiviral responses during infection. To understand the molecular basis for ubiquitin (Ub) recognition and deconjugation by MERS-CoV PL(pro), we determined its crystal structure in complex with Ub. Guided by this structure, mutations were introduced into PL(pro) to specifically disrupt Ub binding without affecting viral polyprotein cleavage, as determined using an in trans nsp3↓4 cleavage assay. Having developed a strategy to selectively disable PL(pro) DUB activity, we were able to specifically examine the effects of this activity on the innate immune response. Whereas the wild-type PL(pro) domain was found to suppress IFN-β promoter activation, PL(pro) variants specifically lacking DUB activity were no longer able to do so. These findings directly implicate the DUB function of PL(pro), and not its proteolytic activity per se, in the inhibition of IFN-β promoter activity. The ability to decouple the DUB activity of PL(pro) from its role in viral polyprotein processing now provides an approach to further dissect the role(s) of PL(pro) as a viral DUB during MERS-CoV infection.

    Organizational Affiliation: 

    From the Department of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada and brian.mark@umanitoba.ca.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ORF1ab proteinA324Human betacoronavirus 2c Jordan-N3/2012Mutation(s): 0 
Gene Names: ORF1ab
EC: 2.7.7.48 (UniProt), 3.4.19.12 (UniProt), 3.4.22.69 (UniProt), 3.6.4.12 (UniProt), 3.6.4.13 (UniProt)
UniProt
Find proteins for M4STU1 (Human betacoronavirus 2c Jordan-N3/2012)
Explore M4STU1 
Go to UniProtKB:  M4STU1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupM4STU1
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-60S ribosomal protein L40B75Homo sapiensMutation(s): 0 
Gene Names: UBA52, UBCEP2
UniProt & NIH Common Fund Data Resources
Find proteins for P62987 (Homo sapiens)
Explore P62987 
Go to UniProtKB:  P62987
PHAROS:  P62987
GTEx:  ENSG00000221983 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62987
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.243 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 176.972α = 90
b = 176.972β = 90
c = 84.549γ = 120
Software Package:
Software NamePurpose
MxDCdata collection
SOLVEphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references
  • Version 1.2: 2015-01-14
    Changes: Database references