2C6S

human adenovirus penton base 2 12 chimera


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.340 
  • R-Value Work: 0.275 
  • R-Value Observed: 0.276 

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This is version 1.3 of the entry. See complete history


Literature

Structural and Biochemical Characterization of a Human Adenovirus 2/12 Penton Base Chimera.

Zubieta, C.Blanchoin, L.Cusack, S.

(2006) FEBS J 273: 4336

  • DOI: 10.1111/j.1742-4658.2006.05430.x
  • Primary Citation of Related Structures:  
    2C6S

  • PubMed Abstract: 
  • The vertex of the adenoviral capsid is formed by the penton, a complex of two proteins, the pentameric penton base and the trimeric fiber protein. The penton contains all necessary components for viral attachment and entry into the host cell. After initial attachment via the head domain of the fiber protein, the penton base interacts with cellular integrins through an Arg-Gly-Asp (RGD) motif located in a hypervariable surface loop, triggering virus internalization ...

    The vertex of the adenoviral capsid is formed by the penton, a complex of two proteins, the pentameric penton base and the trimeric fiber protein. The penton contains all necessary components for viral attachment and entry into the host cell. After initial attachment via the head domain of the fiber protein, the penton base interacts with cellular integrins through an Arg-Gly-Asp (RGD) motif located in a hypervariable surface loop, triggering virus internalization. In order to investigate the structural and functional role of this region, we replaced the hypervariable loop of serotype 2 with the corresponding, but much shorter, loop of serotype 12 and compared it to the wild type. Here, we report the 3.6 A crystal structure of a human adenovirus 2/12 penton base chimera crystallized as a dodecamer. The structure is generally similar to human adenovirus 2 penton base, with the main differences localized to the fiber protein-binding site. Fluorescence anisotropy assays using a trimeric fiber protein mimetic called the minifiber and wild-type human adenovirus 2 and chimeric penton base demonstrate that fiber protein binding is independent of the hypervariable loop, with a K(d) for fiber binding estimated in the 1-2 microm range. Interestingly, competition assays using labeled and unlabeled minifiber demonstrated virtually irreversible binding to the penton base, which we ascribe to a conformational change, on the basis of comparisons of all available penton base structures.


    Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble Outstation, France. czubieta@slac.stanford.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ADENOVIRUS 2,12 PENTON BASE CHIMERA
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O
523Human adenovirus 2Mutation(s): 0 
Gene Names: L2
UniProt
Find proteins for P03276 (Human adenovirus C serotype 2)
Explore P03276 
Go to UniProtKB:  P03276
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03276
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 0.340 
  • R-Value Work: 0.275 
  • R-Value Observed: 0.276 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 266.5α = 90
b = 292.9β = 90
c = 307.3γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-04-03
    Changes: Data collection, Other, Source and taxonomy