Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 209.99 kDa 
• Atom Count: 12583 
• Residue Count: 1724 
• Unique protein chains: 1

1SZP

A Crystal Structure of the Rad51 Filament

• DOI: 10.2210/pdb1SZP/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Saccharomyces cerevisiae
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2004-04-06 Released: 2004-07-13 
• Deposition Author(s): Conway, A.B., Lynch, T.W., Zhang, Y., Fortin, G.S., Symington, L.S., Rice, P.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.25 Å
• R-Value Free: 0.320 
• R-Value Work: 0.268 
• R-Value Observed: 0.273 

Literature

Crystal structure of a Rad51 filament.

Conway, A.B., Lynch, T.W., Zhang, Y., Fortin, G.S., Fung, C.W., Symington, L.S., Rice, P.A.

(2004) Nat Struct Mol Biol 11: 791-796

• PubMed: 15235592 
• DOI: 10.1038/nsmb795
• Primary Citation of Related Structures:  
  1SZP


• PubMed Abstract: 
  

Rad51, the major eukaryotic homologous recombinase, is important for the repair of DNA damage and the maintenance of genomic diversity and stability. The active form of this DNA-dependent ATPase is a helical filament within which the search for homology and strand exchange occurs. Here we present the crystal structure of a Saccharomyces cerevisiae Rad51 filament formed by a gain-of-function mutant. This filament has a longer pitch than that seen in crystals of Rad51's prokaryotic homolog RecA, and places the ATPase site directly at a new interface between protomers. Although the filament exhibits approximate six-fold symmetry, alternate protein-protein interfaces are slightly different, implying that the functional unit of Rad51 within the filament may be a dimer. Additionally, we show that mutation of His352, which lies at this new interface, markedly disrupts DNA binding.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, The University of Chicago, 920 East 58th Street, Chicago, Illinois 60637, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA repair protein RAD51	A, B, C, D, E, F	321	Saccharomyces cerevisiae	Mutation(s): 1  Gene Names: RAD51, YER095W
Find proteins for P25454 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P25454  Go to UniProtKB:  P25454

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A, B, C, D, E, F	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.25 Å
• R-Value Free: 0.320 
• R-Value Work: 0.268 
• R-Value Observed: 0.273 
• Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 135.262	α = 90
b = 135.262	β = 90
c = 128.887	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
EPMR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-04-06 
• Released Date: 2004-07-13 
Deposition Author(s): Conway, A.B., Lynch, T.W., Zhang, Y., Fortin, G.S., Symington, L.S., Rice, P.A.

Revision History 

• Version 1.0: 2004-07-13
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance