Biological Assembly 1  

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

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 75.10 kDa 
• Atom Count: 4287 
• Modelled Residue Count: 543 
• Deposited Residue Count: 666 
• Unique protein chains: 1

3IO5

Crystal Structure of a dimeric form of the uvsX Recombinase core domain from Enterobacteria Phage T4

• PDB DOI: 10.2210/pdb3IO5/pdb

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


• Deposited: 2009-08-13 Released: 2010-08-25 
• Deposition Author(s): Gajewski, S.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.248 
• R-Value Work: 0.210 
• R-Value Observed: 0.212 

Literature

Crystal Structure of the Phage T4 Recombinase UvsX and Its Functional Interaction with the T4 SF2 Helicase UvsW.

Gajewski, S., Webb, M.R., Galkin, V., Egelman, E.H., Kreuzer, K.N., White, S.W.

(2011) J Mol Biol 405: 65-76

• PubMed: 21035462 
• DOI: 10.1016/j.jmb.2010.10.004
• Primary Citation of Related Structures:  
  3IO5


• PubMed Abstract: 
  

Bacteriophage T4 provides an important model system for studying the mechanism of homologous recombination. We have determined the crystal structure of the T4 UvsX recombinase, and the overall architecture and fold closely resemble those of RecA, including a highly conserved ATP binding site. Based on this new structure, we reanalyzed electron microscopy reconstructions of UvsX-DNA filaments and docked the UvsX crystal structure into two different filament forms: a compressed filament generated in the presence of ADP and an elongated filament generated in the presence of ATP and aluminum fluoride. In these reconstructions, the ATP binding site sits at the protomer interface, as in the RecA filament crystal structure. However, the environment of the ATP binding site is altered in the two filament reconstructions, suggesting that nucleotide cannot be as easily accommodated at the protomer interface of the compressed filament. Finally, we show that the phage helicase UvsW completes the UvsX-promoted strand-exchange reaction, allowing the generation of a simple nicked circular product rather than complex networks of partially exchanged substrates.

---

Organizational Affiliation: 

Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Recombination and repair protein	A, B	333	Escherichia virus T4	Mutation(s): 0  Gene Names: fdsA, UVSX
UniProt
Find proteins for P04529 (Enterobacteria phage T4) Explore P04529  Go to UniProtKB:  P04529

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	C [auth A], D [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.248 
• R-Value Work: 0.210 
• R-Value Observed: 0.212 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.974	α = 90
b = 95.974	β = 90
c = 131.274	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-08-13 
• Released Date: 2010-08-25 
Deposition Author(s): Gajewski, S.

Revision History  

• Version 1.0: 2010-08-25
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-11-01
  Changes: Refinement description