2BT7

Structure of the C-terminal receptor-binding domain of avian reovirus fibre sigmaC, Cd crystal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the Carboxy-Terminal Receptor-Binding Domain of Avian Reovirus Fibre Sigmac

Guardado Calvo, P.Fox, G.C.Hermo Parrado, X.L.Llamas-Saiz, A.L.Costas, C.Martinez-Costas, J.Benavente, J.van Raaij, M.J.

(2005) J.Mol.Biol. 354: 137

  • DOI: 10.1016/j.jmb.2005.09.034
  • Primary Citation of Related Structures:  
  • Also Cited By: 2VRS, 2JJL

  • PubMed Abstract: 
  • Avian reovirus fibre, a homo-trimer of the sigmaC protein, is responsible for primary host cell attachment. The protein expressed in bacteria forms elongated fibres comprised of a carboxy-terminal globular head domain and a slender shaft, and partial ...

    Avian reovirus fibre, a homo-trimer of the sigmaC protein, is responsible for primary host cell attachment. The protein expressed in bacteria forms elongated fibres comprised of a carboxy-terminal globular head domain and a slender shaft, and partial proteolysis yielded a carboxy-terminal protease-stable domain that was amenable to crystallisation. Here, we show that this fragment retains receptor-binding capability and report its structure, solved using two-wavelength anomalous diffraction and refined using data collected from three different crystal forms at 2.1 angstroms, 2.35 angstroms and 3.0 angstroms resolution. The carboxy-terminal globular domain has a beta-barrel fold with the same overall topology as the mammalian reovirus fibre (sigma1). However, the monomers of the sigmaC trimer show a more splayed-out arrangement than in the sigma1 structure. Also resolved are two triple beta-spiral repeats of the shaft or stalk domain. The presence in the sequence of heptad repeats amino-terminal to these triple beta-spiral repeats suggests that the unresolved portion of the shaft domain contains a triple alpha-helical coiled-coil structure. Implications for the function and stability of the sigmaC protein are discussed.


    Related Citations: 
    • Protein Architecture of Avian Reovirus S1133 and Identification of the Cell Attachment Protein
      Martinez-Costas, J.,Grande, A.,Varela, R.,Garcia-Martinez, C.,Benavente, J.
      (1997) J.Virol. 71: 59
    • The Avian Reovirus Genome Segment S1 is a Functionally Tricistronic Gene that Expresses One Structure and Two Nonstructural Proteins in Infected Cells
      Bodelon, G.,Labrada, L.,Martinez-Costas, J.,Benavente, J.
      (2001) Virology 290: 181
    • Subunit Composition and Conformational Stability of the Oligomeric Form of the Avian Reovirus Cell-Attachment Protein Sigmac
      Grande, A.,Costas, C.,Benavente, J.
      (2002) J.Gen.Virol. 83: 131
    • Crystal Structure of Reovirus Attachment Protein Sigma1 Reveals Evolutionary Relationship to Adenovirus Fiber
      Chappell, J.D.,Prota, A.E.,Dermody, T.S.,Stehle, T.
      (2002) Embo J. 21: 1
    • Oligomerization and Cell-Binding Properties of the Avian Reovirus Cell-Attachment Protein Sigmac
      Grande, A.,Rodriguez, E.,Costas, C.,Everitt, E.,Benavente, J.
      (2000) Virology 274: 367


    Organizational Affiliation

    Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Santiago de Compostela, Campus Sur, E-15782 Santiago de Compostela, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIGMA C
A
170Avian orthoreovirusMutation(s): 0 
Find proteins for O12287 (Avian orthoreovirus)
Go to UniProtKB:  O12287
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CD
Query on CD

Download SDF File 
Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.183 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 73.075α = 90.00
b = 73.075β = 90.00
c = 69.928γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
SHELXDphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-02-07
    Type: Database references, Source and taxonomy