Biological Assembly 1  

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

Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 62.53 kDa 
• Atom Count: 4672 
• Modelled Residue Count: 576 
• Deposited Residue Count: 576 
• Unique protein chains: 1

1QEX

BACTERIOPHAGE T4 GENE PRODUCT 9 (GP9), THE TRIGGER OF TAIL CONTRACTION AND THE LONG TAIL FIBERS CONNECTOR

• PDB DOI: 10.2210/pdb1QEX/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Escherichia virus T4
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-03-30 Released: 1999-10-05 
• Deposition Author(s): Kostyuchenko, V.A., Navruzbekov, G.A., Kurochkina, L.P., Strelkov, S.V., Mesyanzhinov, V.V., Rossmann, M.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.277 
• R-Value Work: 0.239 

Literature

The structure of bacteriophage T4 gene product 9: the trigger for tail contraction.

Kostyuchenko, V.A., Navruzbekov, G.A., Kurochkina, L.P., Strelkov, S.V., Mesyanzhinov, V.V., Rossmann, M.G.

(1999) Structure 7: 1213-1222

• PubMed: 10545330 
• DOI: 10.1016/s0969-2126(00)80055-6
• Primary Citation of Related Structures:  
  1QEX, 1S2E


• PubMed Abstract: 
  

The T4 bacteriophage consists of a head, filled with double-stranded DNA, and a complex contractile tail required for the ejection of the viral genome into the Escherichia coli host. The tail has a baseplate to whïch are attached six long and six short tail fibers. These fibers are the sensing devices for recognizing the host. When activated by attachment to cell receptors, the fibers cause a conformational transition in the baseplate and subsequently in the tail sheath, which initiates DNA ejection. The baseplate is a multisubunit complex of proteins encoded by 15 genes. Gene product 9 (gp9) is the protein that connects the long tail fibers to the baseplate and triggers the tail contraction after virus attachment to a host cell.

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Related Citations: 

• Crystallization and preliminary crystallographic characterization of bacteriophage T4 baseplate protein encoded by gene 9.
  Strelkov, S.V., Zurabishvili, T.G., Nepluev, I.V., Efimov, V.P., Isupov, M.N., Harutyunyan, E.H., Mesyanzhinov, V.V.
  (1993) J Mol Biol 234: 493

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Organizational Affiliation: 

Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, 16/10 Miklukho-Maklaya Street, Moscow, 117871, Russia.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (BACTERIOPHAGE T4 GENE PRODUCT 9 (GP9))	A, B	288	Escherichia virus T4	Mutation(s): 0  Gene Names: 9
UniProt
Find proteins for P10927 (Enterobacteria phage T4) Explore P10927  Go to UniProtKB:  P10927

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EPE	C [auth A], D [auth B]	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.277 
• R-Value Work: 0.239 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 94.33	α = 90
b = 94.33	β = 90
c = 440.94	γ = 120

Software Package:

Software Name	Purpose
CCP4	model building
CNS	refinement
DENZO	data reduction
SnB	phasing
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-03-30 
• Released Date: 1999-10-05 
Deposition Author(s): Kostyuchenko, V.A., Navruzbekov, G.A., Kurochkina, L.P., Strelkov, S.V., Mesyanzhinov, V.V., Rossmann, M.G.

Revision History  

• Version 1.0: 1999-10-05
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description
• Version 1.4: 2019-11-20
  Changes: Database references