6EQC

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.4 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

  • 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 m ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule Chains Sequence Length Organism Details
Hexon protein
A, B, C
952 Human adenovirus C serotype 5 N/A
Find proteins for P04133 (Human adenovirus C serotype 5)
Go to UniProtKB:  P04133
Entity ID: 2
Molecule Chains Sequence Length Organism Details
scFv of 9C12 antibody
D, E, F
254 N/A N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-02-07
    Type: Initial release
  • Version 1.1: 2018-02-14
    Type: Database references