6EQC

Cryo-EM reconstruction of a complex of a binding protein and human adenovirus C5 hexon


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.40 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

Adenoviral vector with shield and adapter increases tumor specificity and escapes liver and immune control.

Schmid, M.Ernst, P.Honegger, A.Suomalainen, M.Zimmermann, M.Braun, L.Stauffer, S.Thom, C.Dreier, B.Eibauer, M.Kipar, A.Vogel, V.Greber, U.F.Medalia, O.Pluckthun, A.

(2018) Nat Commun 9: 450-450

  • DOI: 10.1038/s41467-017-02707-6
  • Primary Citation of Related Structures:  
    5OGI, 6EQC

  • PubMed Abstract: 
  • Most systemic viral gene therapies have been limited by sequestration and degradation of virions, innate and adaptive immunity, and silencing of therapeutic genes within the target cells. Here we engineer a high-affinity protein coat, shielding the most commonly used vector in clinical gene therapy, human adenovirus type 5 ...

    Most systemic viral gene therapies have been limited by sequestration and degradation of virions, innate and adaptive immunity, and silencing of therapeutic genes within the target cells. Here we engineer a high-affinity protein coat, shielding the most commonly used vector in clinical gene therapy, human adenovirus type 5. Using electron microscopy and crystallography we demonstrate a massive coverage of the virion surface through the hexon-shielding scFv fragment, trimerized to exploit the hexon symmetry and gain avidity. The shield reduces virion clearance in the liver. When the shielded particles are equipped with adaptor proteins, the virions deliver their payload genes into human cancer cells expressing HER2 or EGFR. The combination of shield and adapter also increases viral gene delivery to xenografted tumors in vivo, reduces liver off-targeting and immune neutralization. Our study highlights the power of protein engineering for viral vectors overcoming the challenges of local and systemic viral gene therapies.


    Organizational Affiliation

    Department of Biochemistry, University of Zurich, Winterthurerstr, 190, 8057, Zurich, Switzerland. plueckthun@bioc.uzh.ch.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hexon proteinA, B, C952Human adenovirus 5Mutation(s): 0 
Gene Names: L3
UniProt
Find proteins for P04133 (Human adenovirus C serotype 5)
Explore P04133 
Go to UniProtKB:  P04133
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04133
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
scFv of 9C12 antibodyD, E, F254Mus musculusMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.40 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: 2018-02-07
    Type: Initial release
  • Version 1.1: 2018-02-14
    Changes: Database references