Crystal Structure of Ad35 fiber knob

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.352 
  • R-Value Work: 0.332 
  • R-Value Observed: 0.332 

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Conservation of fiber structure and CD46 usage by subgroup B2 adenoviruses

Pache, L.Venkataraman, S.Nemerow, G.R.Reddy, V.S.

(2008) Virology 375: 573-579

  • DOI: https://doi.org/10.1016/j.virol.2008.02.013
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Most subgroup B2 adenoviruses use CD46 as their primary receptor. Recent structural and mutagenesis studies suggested that Ad11 and Ad35 likely engage this receptor in a very similar fashion. However, no comparative studies assessing the cell-associated CD46 binding efficiencies of different Ad fibers have been performed. We solved the crystal structure of Ad35 fiber knob and constructed a model of the fiber knob complexed with CD46. Comparison of our model with that of Ad11-CD46 showed that despite a larger CD46-interacting region in the IJ loop of Ad11, the buried surface area was very similar, suggesting that both fiber knobs might exhibit similar binding. In support of this, cell based competition studies demonstrated almost identical binding efficiencies of Ad11 and Ad35 fibers to cell surface CD46. These findings shed further light on CD46 association by Ad and could impact the selection of novel Ad types for gene transfer.

  • Organizational Affiliation

    Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fiber220Human adenovirus 35Mutation(s): 0 
Find proteins for Q7T925 (Human adenovirus B serotype 35)
Explore Q7T925 
Go to UniProtKB:  Q7T925
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7T925
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.352 
  • R-Value Work: 0.332 
  • R-Value Observed: 0.332 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 173.906α = 90
b = 173.906β = 90
c = 154.145γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-01-31
    Changes: Experimental preparation, Source and taxonomy
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references