Journal article
An archaeal RadA paralog influences presynaptic filament formation
DNA repair, Vol.12(6), pp.403-413
06/01/2013
Handle:
https://hdl.handle.net/2376/109490
PMCID: PMC4084651
PMID: 23622866
Abstract
•The SsoRal1 paralog reduces recombinase ATPase activity.•SsoRal1 modulates SsoRadA presynaptic filament dynamics.•SsoRadA-mediated joint molecule formation is stimulated by SsoRal1.•SsoRal1 activities correlate with a mediator function in homologous recombination.
Recombinases of the RecA family play vital roles in homologous recombination, a high-fidelity mechanism to repair DNA double-stranded breaks. These proteins catalyze strand invasion and exchange after forming dynamic nucleoprotein filaments on ssDNA. Increasing evidence suggests that stabilization of these dynamic filaments is a highly conserved function across diverse species. Here, we analyze the presynaptic filament formation and DNA binding characteristics of the Sulfolobus solfataricus recombinase SsoRadA in conjunction with the SsoRadA paralog SsoRal1. In addition to constraining SsoRadA ssDNA-dependent ATPase activity, the paralog also enhances SsoRadA ssDNA binding, effectively influencing activities necessary for presynaptic filament formation. These activities result in enhanced SsoRadA-mediated strand invasion in the presence of SsoRal1 and suggest a filament stabilization function for the SsoRal1 protein.
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Details
- Title
- An archaeal RadA paralog influences presynaptic filament formation
- Creators
- William J GrahamMichael L RolfsmeierCynthia A Haseltine
- Publication Details
- DNA repair, Vol.12(6), pp.403-413
- Academic Unit
- Molecular Biosciences, School of
- Publisher
- Elsevier B.V
- Identifiers
- 99900547251801842
- Language
- English
- Resource Type
- Journal article