4A0T

Structure of the carboxy-terminal domain of bacteriophage T7 fibre gp17 containing residues 371-553.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.157 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of the receptor-binding carboxy-terminal domain of bacteriophage T7 tail fibers.

Garcia-Doval, C.van Raaij, M.J.

(2012) Proc Natl Acad Sci U S A 109: 9390-9395

  • DOI: 10.1073/pnas.1119719109
  • Primary Citation of Related Structures:  
    4A0T, 4A0U

  • PubMed Abstract: 
  • The six bacteriophage T7 tail fibers, homo-trimers of gene product 17, are thought to be responsible for the first specific, albeit reversible, attachment to Escherichia coli lipopolysaccharide. The protein trimer forms kinked fibers comprised of an amino-terminal tail-attachment domain, a slender shaft, and a carboxyl-terminal domain composed of several nodules ...

    The six bacteriophage T7 tail fibers, homo-trimers of gene product 17, are thought to be responsible for the first specific, albeit reversible, attachment to Escherichia coli lipopolysaccharide. The protein trimer forms kinked fibers comprised of an amino-terminal tail-attachment domain, a slender shaft, and a carboxyl-terminal domain composed of several nodules. Previously, we expressed, purified, and crystallized a carboxyl-terminal fragment comprising residues 371-553. Here, we report the structure of this protein trimer, solved using anomalous diffraction and refined at 2 Å resolution. Amino acids 371-447 form a tapered pyramid with a triangular cross-section composed of interlocked β-sheets from each of the three chains. The triangular pyramid domain has three α-helices at its narrow end, which are connected to a carboxyl-terminal three-blade β-propeller tip domain by flexible loops. The monomers of this tip domain each contain an eight-stranded β-sandwich. The exact topology of the β-sandwich fold is novel, but similar to that of knob domains of other viral fibers and the phage Sf6 needle. Several host-range change mutants have been mapped to loops located on the top of this tip domain, suggesting that this surface of the tip domain interacts with receptors on the cell surface.


    Related Citations: 
    • Crystallization of the C-Terminal Domain of the Bacteriophage T7 Fibre Protein Gp17.
      Garcia-Doval, C., van Raaij, M.J.
      (2012) Acta Crystallogr Sect F Struct Biol Cryst Commun 68: 166

    Organizational Affiliation

    Department of Molecular Structure, Centro Nacional de Biotecnologia, Consejo Superior de Investigaciones Cientificas, E-28049 Madrid, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TAIL FIBER PROTEINA, B, C228Escherichia phage T7Mutation(s): 0 
Gene Names: 17
UniProt
Find proteins for P03748 (Escherichia phage T7)
Explore P03748 
Go to UniProtKB:  P03748
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03748
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1PE
Query on 1PE

Download Ideal Coordinates CCD File 
H [auth C]PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

Download Ideal Coordinates CCD File 
F [auth B]2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
TMO
Query on TMO

Download Ideal Coordinates CCD File 
D [auth A],
E [auth B],
G [auth C]
trimethylamine oxide
C3 H9 N O
UYPYRKYUKCHHIB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.157 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.24α = 90
b = 86.04β = 90
c = 118.41γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
autoSHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2012-06-06
    Changes: Other
  • Version 1.2: 2012-06-20
    Changes: Other
  • Version 1.3: 2016-12-28
    Changes: Database references, Other, Structure summary
  • Version 1.4: 2018-02-07
    Changes: Database references