5F5M

Crystal structure of Marburg virus nucleoprotein core domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.215 

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This is version 1.3 of the entry. See complete history


Literature

Structural Insight into Nucleoprotein Conformation Change Chaperoned by VP35 Peptide in Marburg Virus

Liu, B.Dong, S.Li, G.Wang, W.Liu, X.Wang, Y.Yang, C.Rao, Z.Guo, Y.

(2017) J Virol 91

  • DOI: 10.1128/JVI.00825-17
  • Primary Citation of Related Structures:  
    5F5M, 5F5O

  • PubMed Abstract: 
  • Marburg virus (MARV) encodes a nucleoprotein (NP) to encapsidate its genome by oligomerization and form a ribonucleoprotein complex (RNP). According to previous investigation on nonsegmented negative-sense RNA viruses (nsNSV), the newly synthesized NPs must be prevented from indiscriminately binding to noncognate RNAs ...

    Marburg virus (MARV) encodes a nucleoprotein (NP) to encapsidate its genome by oligomerization and form a ribonucleoprotein complex (RNP). According to previous investigation on nonsegmented negative-sense RNA viruses (nsNSV), the newly synthesized NPs must be prevented from indiscriminately binding to noncognate RNAs. During the viral RNA synthesis process, the RNPs undergo a transition from an RNA-bound form to a template-free form, to open access for the interaction between the viral polymerase and the RNA template. In filoviruses, this transition is regulated by VP35 peptide and other viral components. To further understand the dynamic process of filovirus RNP formation, we report here the structure of MARV NP core , both in the apo form and in the VP35 peptide-chaperoned form. These structures reveal a typical bilobed structure, with a positive-charged RNA binding groove between two lobes. In the apo form, the MARV NP exists in an interesting hexameric state formed by the hydrophobic interaction within the long helix of the NP core C-terminal region, which shows high structural flexibility among filoviruses and may imply critical function during RNP formation. Moreover, the VP35 peptide-chaperoned NP core remains in a monomeric state and completely loses its affinity for single-stranded RNA (ssRNA). The structural comparison reveals that the RNA binding groove undergoes a transition from closed state to open state, chaperoned by VP35 peptide, thus preventing the interaction for viral RNA. Our investigation provides considerable structural insight into the filovirus RNP working mechanism and may support the development of antiviral therapies targeting the RNP formation of filovirus. IMPORTANCE Marburg virus is one of the most dangerous viruses, with high morbidity and mortality. A recent outbreak in Angola in 2005 caused the deaths of 272 persons. NP is one of the most essential proteins, as it encapsidates and protects the whole virus genome simultaneously with self-assembly oligomerization. Here we report the structures of MARV NP core in two different forms. In the MARV NP apo form, we identify an interesting hexamer formed by hydrophobic interaction within a long helix, which is highly conserved and flexible among filoviruses and may indicate its critical function during the virus RNP formation. Moreover, the structural comparison with the NP-VP35 peptide complex reveals a structural transition chaperoned by VP35, in which the RNA binding groove undergoes a transition from closed state to open state. Finally, we discussed the high conservation and critical role of the VP35 binding pocket and its potential use for therapeutic development.


    Organizational Affiliation

    Drug discovery center for infectious disease, Nankai University, Tianjin, People's Republic of China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nucleoprotein AB373Lake Victoria marburgvirus - OzolinMutation(s): 0 
Gene Names: NP
Find proteins for Q6UY69 (Lake Victoria marburgvirus (strain Ozolin-75))
Explore Q6UY69 
Go to UniProtKB:  Q6UY69
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.215 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 147.959α = 90
b = 147.959β = 90
c = 58.982γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
SCALEPACKdata reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-31
    Type: Initial release
  • Version 1.1: 2017-06-14
    Changes: Database references
  • Version 1.2: 2017-08-16
    Changes: Database references
  • Version 1.3: 2017-10-04
    Changes: Data collection