7KJP

Disulfide Stabilized Norovirus GI.1 VLP Shell Region


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.86 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Disulfide stabilization of human norovirus GI.1 virus-like particles focuses immune response toward blockade epitopes.

Verardi, R.Lindesmith, L.C.Tsybovsky, Y.Gorman, J.Chuang, G.Y.Edwards, C.E.Brewer-Jensen, P.D.Mallory, M.L.Ou, L.Schon, A.Shi, W.Tully, E.S.Georgiou, G.Baric, R.S.Kwong, P.D.

(2020) NPJ Vaccines 5: 110-110

  • DOI: 10.1038/s41541-020-00260-w
  • Primary Citation of Related Structures:  
    7KJP

  • PubMed Abstract: 
  • Human noroviruses are non-enveloped, single-strand RNA viruses that cause pandemic outbreaks of acute gastroenteritis. A bivalent vaccine containing GI.1 and GII.4 virus-like particles (VLPs) has been shown to be safe and highly immunogenic, but its efficacy and durability have been limited ...

    Human noroviruses are non-enveloped, single-strand RNA viruses that cause pandemic outbreaks of acute gastroenteritis. A bivalent vaccine containing GI.1 and GII.4 virus-like particles (VLPs) has been shown to be safe and highly immunogenic, but its efficacy and durability have been limited. Here, we show that norovirus GI.1 VLPs are unstable and contain a substantial fraction of dissociated VLP components. Broadly reactive, non-neutralizing antibodies isolated from vaccinated donors bound to the dissociated components, but not to the intact VLPs. Engineering of interprotomer disulfide bonds within the shell domain prevented disassembly of the VLPs, while preserving antibody accessibility to blockade epitopes. Without adjuvant, mice immunized with stabilized GI.1 VLPs developed faster blockade antibody titers compared to immunization with wild-type GI.1 VLPs. In addition, immunization with stabilized particles focused immune responses toward surface-exposed epitopes and away from occluded epitopes. Overall, disulfide-stabilized norovirus GI.1 VLPs elicited improved responses over the non-disulfide-stabilized version, suggesting their promise as candidate vaccines.


    Organizational Affiliation

    Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, 20892, MD, USA. pdkwong@nih.gov.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Capsid protein VP1A, B, C530Norovirus Hu/1968/USMutation(s): 2 
Gene Names: ORF2
Find proteins for Q83884 (Norwalk virus (strain GI/Human/United States/Norwalk/1968))
Explore Q83884 
Go to UniProtKB:  Q83884
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.86 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM103310
Other privateUnited StatesSF349247 (Simons Foundation)
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesS10 OD019994-01
Other privateUnited StatesF00316 (Agouron Institute)

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-02
    Type: Initial release
  • Version 1.1: 2020-12-30
    Changes: Database references