| Literature DB >> 20823543 |
Naoyuki Kuwabara1, Hiroshi Hashimoto, Noriyo Yamada, Satoru Unzai, Mitsunori Ikeguchi, Mamoru Sato, Yasuto Murayama, Hiroshi Iwasaki, Toshiyuki Shimizu.
Abstract
The assembly of the presynaptic filament of recombinases represents the most important step in homologous recombination. The formation of the filament requires assistance from mediator proteins. Swi5 and Sfr1 have been identified as mediators in fission yeast and these proteins form a complex that stimulates strand exchange. Here, the expression, purification and crystallization of Swi5 and its complex with an N-terminally truncated form of Sfr1 (DeltaN180Sfr1) are presented. Analytical ultracentrifugation of the purified samples showed that Swi5 and the protein complex exist as tetramers and heterodimers in solution, respectively. Swi5 was crystallized in two forms belonging to space groups C2 and R3 and the crystals diffracted to 2.7 A resolution. Swi5-DeltaN180Sfr1 was crystallized in space group P2(1)2(1)2 and the crystals diffracted to 2.3 A resolution. The crystals of Swi5 and Swi5-DeltaN180Sfr1 are likely to contain one tetramer and two heterodimers in the asymmetric unit, respectively.Entities:
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Year: 2010 PMID： 20823543 PMCID： PMC2935244 DOI： 10.1107/S1744309110032239
Source DB: PubMed Journal: Acta Crystallogr Sect F Struct Biol Cryst Commun ISSN： 1744-3091