6U5O

Structure of the Human Metapneumovirus Polymerase bound to the phosphoprotein tetramer


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of the human metapneumovirus polymerase phosphoprotein complex.

Pan, J.Qian, X.Lattmann, S.El Sahili, A.Yeo, T.H.Jia, H.Cressey, T.Ludeke, B.Noton, S.Kalocsay, M.Fearns, R.Lescar, J.

(2020) Nature 577: 275-279

  • DOI: 10.1038/s41586-019-1759-1
  • Primary Citation of Related Structures:  
    6U5O

  • PubMed Abstract: 
  • Respiratory syncytial virus (RSV) and human metapneumovirus (HMPV) cause severe respiratory diseases in infants and elderly adults 1 . No vaccine or effective antiviral therapy currently exists to control RSV or HMPV infections. During viral genome replication and transcription, the tetrameric phosphoprotein P serves as a crucial adaptor between the ribonucleoprotein template and the L protein, which has RNA-dependent RNA polymerase (RdRp), GDP polyribonucleotidyltransferase and cap-specific methyltransferase activities 2,3 ...

    Respiratory syncytial virus (RSV) and human metapneumovirus (HMPV) cause severe respiratory diseases in infants and elderly adults 1 . No vaccine or effective antiviral therapy currently exists to control RSV or HMPV infections. During viral genome replication and transcription, the tetrameric phosphoprotein P serves as a crucial adaptor between the ribonucleoprotein template and the L protein, which has RNA-dependent RNA polymerase (RdRp), GDP polyribonucleotidyltransferase and cap-specific methyltransferase activities 2,3 . How P interacts with L and mediates the association with the free form of N and with the ribonucleoprotein is not clear for HMPV or other major human pathogens, including the viruses that cause measles, Ebola and rabies. Here we report a cryo-electron microscopy reconstruction that shows the ring-shaped structure of the polymerase and capping domains of HMPV-L bound to a tetramer of P. The connector and methyltransferase domains of L are mobile with respect to the core. The putative priming loop that is important for the initiation of RNA synthesis is fully retracted, which leaves space in the active-site cavity for RNA elongation. P interacts extensively with the N-terminal region of L, burying more than 4,016 Å 2 of the molecular surface area in the interface. Two of the four helices that form the coiled-coil tetramerization domain of P, and long C-terminal extensions projecting from these two helices, wrap around the L protein in a manner similar to tentacles. The structural versatility of the four P protomers-which are largely disordered in their free state-demonstrates an example of a 'folding-upon-partner-binding' mechanism for carrying out P adaptor functions. The structure shows that P has the potential to modulate multiple functions of L and these results should accelerate the design of specific antiviral drugs.


    Organizational Affiliation

    Antimicrobial Resistance Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, Singapore, Singapore. julien@ntu.edu.sg.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-directed RNA polymerase LA [auth L]2,030Human metapneumovirus CAN97-83Mutation(s): 0 
Gene Names: L
EC: 2.7.7.48 (PDB Primary Data), 2.1.1.56 (PDB Primary Data), 2.7.7 (PDB Primary Data), 2.7.7.88 (PDB Primary Data), 3.6.1 (UniProt), 2.1.1.375 (UniProt)
UniProt
Find proteins for Q6WB93 (Human metapneumovirus (strain CAN97-83))
Explore Q6WB93 
Go to UniProtKB:  Q6WB93
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6WB93
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PhosphoproteinB [auth P],
C [auth Q],
D [auth R],
E [auth S]
319Human metapneumovirus CAN97-83Mutation(s): 0 
Gene Names: P
UniProt
Find proteins for Q8B9Q8 (Human metapneumovirus (strain CAN97-83))
Explore Q8B9Q8 
Go to UniProtKB:  Q8B9Q8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8B9Q8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Education (MoE, Singapore)SingaporeMOE2016-T3-1-003
National Research Foundation (NRF, Singapore)SingaporeNRF2016NRF-CRP001-063
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesAI089618

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-25
    Type: Initial release
  • Version 1.1: 2019-12-04
    Changes: Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence
  • Version 1.3: 2020-01-22
    Changes: Database references