3IYA

Association of the pr peptides with dengue virus blocks membrane fusion at acidic pH


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 22.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.4 of the entry. See complete history


Literature

Association of the pr peptides with dengue virus at acidic pH blocks membrane fusion.

Yu, I.M.Holdaway, H.A.Chipman, P.R.Kuhn, R.J.Rossmann, M.G.Chen, J.

(2009) J Virol 83: 12101-12107

  • DOI: 10.1128/JVI.01637-09
  • Primary Citation of Related Structures:  
    3IYA

  • PubMed Abstract: 
  • Flavivirus assembles into an inert particle that requires proteolytic activation by furin to enable transmission to other hosts. We previously showed that immature virus undergoes a conformational change at low pH that renders it accessible to furin (I. M ...

    Flavivirus assembles into an inert particle that requires proteolytic activation by furin to enable transmission to other hosts. We previously showed that immature virus undergoes a conformational change at low pH that renders it accessible to furin (I. M. Yu, W. Zhang, H. A. Holdaway, L. Li, V. A. Kostyuchenko, P. R. Chipman, R. J. Kuhn, M. G. Rossmann, and J. Chen, Science 319:1834-1837, 2008). Here we show, using cryoelectron microscopy, that the structure of immature dengue virus at pH 6.0 is essentially the same before and after the cleavage of prM. The structure shows that after cleavage, the proteolytic product pr remains associated with the virion at acidic pH, and that furin cleavage by itself does not induce any major conformational changes. We also show by liposome cofloatation experiments that pr retention prevents membrane insertion, suggesting that pr is present on the virion in the trans-Golgi network to protect the progeny virus from fusion within the host cell.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Envelope proteinA, C [auth B], E [auth C]395Dengue virus 2Mutation(s): 0 
EC: 3.4.21.91 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.1.1.56 (UniProt), 2.1.1.57 (UniProt), 2.7.7.48 (UniProt)
UniProt
Find proteins for P14340 (Dengue virus type 2 (strain Thailand/NGS-C/1944))
Explore P14340 
Go to UniProtKB:  P14340
Find proteins for E7FLK7 (Dengue virus 2)
Explore E7FLK7 
Go to UniProtKB:  E7FLK7
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
prM proteinB [auth D], D [auth E], F81Dengue virus 2Mutation(s): 0 
EC: 3.4.21.91 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.1.1.56 (UniProt), 2.1.1.57 (UniProt), 2.7.7.48 (UniProt)
UniProt
Find proteins for P14340 (Dengue virus type 2 (strain Thailand/NGS-C/1944))
Explore P14340 
Go to UniProtKB:  P14340
Find proteins for E7FLK7 (Dengue virus 2)
Explore E7FLK7 
Go to UniProtKB:  E7FLK7
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 22.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-04-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-10-26
    Changes: Source and taxonomy
  • Version 1.3: 2016-11-02
    Changes: Source and taxonomy
  • Version 1.4: 2018-07-18
    Changes: Data collection