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3VIR

Crystal strcture of Swi5 from fission yeast

Summary for 3VIR
Entry DOI10.2210/pdb3vir/pdb
Related3VIQ
DescriptorMating-type switching protein swi5, octyl beta-D-glucopyranoside (2 entities in total)
Functional Keywordssfr1, recombination activator
Biological sourceSchizosaccharomyces pombe (Fission yeast)
Total number of polymer chains4
Total formula weight39640.97
Authors
Kuwabara, N.,Yamada, N.,Hashimoto, H.,Sato, M.,Iwasaki, H.,Shimizu, T. (deposition date: 2011-10-06, release date: 2012-08-22, Last modification date: 2024-03-20)
Primary citationKuwabara, N.,Murayama, Y.,Hashimoto, H.,Kokabu, Y.,Ikeguchi, M.,Sato, M.,Mayanagi, K.,Tsutsui, Y.,Iwasaki, H.,Shimizu, T.
Mechanistic insights into the activation of Rad51-mediated strand exchange from the structure of a recombination activator, the Swi5-Sfr1 complex
Structure, 20:440-449, 2012
Cited by
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 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.
PubMed: 22405003
DOI: 10.1016/j.str.2012.01.005
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2.7 Å)
Structure validation

238895

数据于2025-07-16公开中

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