Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 74.44 kDa 
• Atom Count: 5332 
• Residue Count: 648 
• Unique protein chains: 1

2XGF

Structure of the bacteriophage T4 long tail fibre needle-shaped receptor-binding tip

• DOI: 10.2210/pdb2XGF/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Escherichia virus T4
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-06-03 Released: 2010-11-03 
• Deposition Author(s): Bartual, S.G., Otero, J.M., Garcia-Doval, C., Llamas-Saiz, A.L., Kahn, R., Fox, G.C., van Raaij, M.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.238 
• R-Value Work: 0.179 
• R-Value Observed: 0.182 

Literature

Structure of the bacteriophage T4 long tail fiber receptor-binding tip.

Bartual, S.G., Otero, J.M., Garcia-Doval, C., Llamas-Saiz, A.L., Kahn, R., Fox, G.C., van Raaij, M.J.

(2010) Proc Natl Acad Sci U S A 107: 20287-20292

• PubMed: 21041684 
• DOI: 10.1073/pnas.1011218107
• Primary Citation of Related Structures:  
  2XGF


• PubMed Abstract: 
  

Bacteriophages are the most numerous organisms in the biosphere. In spite of their biological significance and the spectrum of potential applications, little high-resolution structural detail is available on their receptor-binding fibers. Here we present the crystal structure of the receptor-binding tip of the bacteriophage T4 long tail fiber, which is highly homologous to the tip of the bacteriophage lambda side tail fibers. This structure reveals an unusual elongated six-stranded antiparallel beta-strand needle domain containing seven iron ions coordinated by histidine residues arranged colinearly along the core of the biological unit. At the end of the tip, the three chains intertwine forming a broader head domain, which contains the putative receptor interaction site. The structure reveals a previously unknown beta-structured fibrous fold, provides insights into the remarkable stability of the fiber, and suggests a framework for mutations to expand or modulate receptor-binding specificity.

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Related Citations: 

• Two-Chaperone Assisted Soluble Expression and Purification of the Bacteriophage T4 Long Tail Fibre Protein Gp37.
  Bartual, S.G., Garcia-Doval, C., Alonso, J., Schoehn, G., van Raaij, M.J.
  (2010) Protein Expr Purif 70: 116

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Organizational Affiliation: 

Departamento de Bioquimica y Biologia Molecular, Facultad de Farmacia, Campus Vida, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LONG TAIL FIBER PROTEIN P37	A, B, C	242	Escherichia virus T4	Mutation(s): 0  Gene Names: 37
Find proteins for P03744 (Enterobacteria phage T4) Explore P03744  Go to UniProtKB:  P03744

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CO3	B	CARBONATE ION C O3 BVKZGUZCCUSVTD-UHFFFAOYSA-L
FE2	A	FE (II) ION Fe CWYNVVGOOAEACU-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.238 
• R-Value Work: 0.179 
• R-Value Observed: 0.182 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 157.34	α = 90
b = 53.98	β = 100.43
c = 112.75	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-06-03 
• Released Date: 2010-11-03 
Deposition Author(s): Bartual, S.G., Otero, J.M., Garcia-Doval, C., Llamas-Saiz, A.L., Kahn, R., Fox, G.C., van Raaij, M.J.

Revision History 

• Version 1.0: 2010-11-03
  Type: Initial release
  
• Version 1.1: 2013-03-06
  Changes: Data collection, Version format compliance
• Version 1.2: 2018-02-07
  Changes: Database references