3VIQ

Crystal structure of Swi5-Sfr1 complex from fission yeast


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 

wwPDB Validation 3D Report Full Report



Literature

Mechanistic insights into the activation of Rad51-mediated strand exchange from the structure of a recombination activator, the Swi5-Sfr1 complex

Kuwabara, N.Murayama, Y.Hashimoto, H.Kokabu, Y.Ikeguchi, M.Sato, M.Mayanagi, K.Tsutsui, Y.Iwasaki, H.Shimizu, T.

(2012) Structure 20: 440-449

  • DOI: 10.1016/j.str.2012.01.005
  • Primary Citation of Related Structures:  
    3VIQ, 3VIR

  • PubMed Abstract: 
  • Rad51 forms a helical filament on single-stranded DNA and promotes strand exchange between two homologous DNA molecules during homologous recombination. The Swi5-Sfr1 complex interacts directly with Rad51 and stimulates strand exchange. Here we descr ...

    Rad51 forms a helical filament on single-stranded DNA and promotes strand exchange between two homologous DNA molecules during homologous recombination. The Swi5-Sfr1 complex interacts directly with Rad51 and stimulates strand exchange. Here we describe structural and functional aspects of the complex. Swi5 and the C-terminal core domain of Sfr1 form an essential activator complex with a parallel coiled-coil heterodimer joined firmly together via two previously uncharacterized leucine-zipper motifs and a bundle. The resultant coiled coil is sharply kinked, generating an elongated crescent-shaped structure suitable for transient binding within the helical groove of the Rad51 filament. The N-terminal region of Sfr1, meanwhile, has an interface for binding of Rad51. Our data suggest that the snug fit resulting from the complementary geometry of the heterodimer activates the Rad51 filament and that the N-terminal domain of Sfr1 plays a role in the efficient recruitment of the Swi5-Sfr1 complex to the Rad51 filaments.


    Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Swi5-dependent recombination DNA repair protein 1AC122Schizosaccharomyces pombe 972h-Mutation(s): 0 
Gene Names: sfr1dds20mug13SPBC28F2.07
Find proteins for Q9USV1 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore Q9USV1 
Go to UniProtKB:  Q9USV1
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mating-type switching protein swi5BD85Schizosaccharomyces pombe 972h-Mutation(s): 0 
Gene Names: swi5SPBC409.03
Find proteins for Q9UUB7 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore Q9UUB7 
Go to UniProtKB:  Q9UUB7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, C, D
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NO3
Query on NO3

Download CCD File 
A
NITRATE ION
N O3
NHNBFGGVMKEFGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.159α = 90
b = 128.682β = 90
c = 59.97γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SHELXSphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-22
    Type: Initial release