Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C6  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 189.52 kDa 
• Atom Count: 10524 
• Modelled Residue Count: 1266 
• Deposited Residue Count: 1632 
• Unique protein chains: 1

4HUD

Structure of the bacteriophage T4 tail terminator protein, gp15.

• PDB DOI: 10.2210/pdb4HUD/pdb

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


• Deposited: 2012-11-02 Released: 2013-02-27 
• Deposition Author(s): Fokine, A., Zhang, Z., Kanamaru, S., Bowman, V.D., Aksyuk, A., Arisaka, F., Rao, V.B., Rossmann, M.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 

Literature

The molecular architecture of the bacteriophage t4 neck.

Fokine, A., Zhang, Z., Kanamaru, S., Bowman, V.D., Aksyuk, A.A., Arisaka, F., Rao, V.B., Rossmann, M.G.

(2013) J Mol Biol 425: 1731-1744

• PubMed: 23434847 
• DOI: 10.1016/j.jmb.2013.02.012
• Primary Citation of Related Structures:  
  3J2M, 3J2N, 3J2O, 4HUD, 4HUH


• PubMed Abstract: 
  

A hexamer of the bacteriophage T4 tail terminator protein, gp15, attaches to the top of the phage tail stabilizing the contractile sheath and forming the interface for binding of the independently assembled head. Here we report the crystal structure of the gp15 hexamer, describe its interactions in T4 virions that have either an extended tail or a contracted tail, and discuss its structural relationship to other phage proteins. The neck of T4 virions is decorated by the "collar" and "whiskers", made of fibritin molecules. Fibritin acts as a chaperone helping to attach the long tail fibers to the virus during the assembly process. The collar and whiskers are environment-sensing devices, regulating the retraction of the long tail fibers under unfavorable conditions, thus preventing infection. Cryo-electron microscopy analysis suggests that twelve fibritin molecules attach to the phage neck with six molecules forming the collar and six molecules forming the whiskers.

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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tail connector protein Gp15	A, B, C, D, E, F	272	Escherichia virus T4	Mutation(s): 0  Gene Names: 15
UniProt
Find proteins for P11112 (Enterobacteria phage T4) Explore P11112  Go to UniProtKB:  P11112

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.252 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 
• Space Group: P 3₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 100.682	α = 90
b = 100.682	β = 90
c = 155.891	γ = 120

Software Package:

Software Name	Purpose
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-11-02 
• Released Date: 2013-02-27 
Deposition Author(s): Fokine, A., Zhang, Z., Kanamaru, S., Bowman, V.D., Aksyuk, A., Arisaka, F., Rao, V.B., Rossmann, M.G.

Revision History  

• Version 1.0: 2013-02-27
  Type: Initial release
  
• Version 1.1: 2013-03-13
  Changes: Database references
• Version 1.2: 2013-05-22
  Changes: Database references
• Version 1.3: 2017-11-15
  Changes: Refinement description