Functional attributes of the Saccharomyces cerevisiae meiotic recombinase Dmc1
Journal
DNA Repair
Journal Volume
12
Journal Issue
9
Pages
707 - 712
Date Issued
2013
Author(s)
Busygina, Valeria
Gaines, William A.
Xu, Yuanyuan
Kwon, Youngho
Williams, Gareth J.
Lin, Sheng-Wei
Chang, Hao-Yen
Wang, Hong-Wei
Sung, Patrick
Abstract
The role of Dmc1 as a meiosis-specific general recombinase was first demonstrated in Saccharomyces cerevisiae. Progress in understanding the biochemical mechanism of ScDmc1 has been hampered by its tendency to form inactive aggregates. We have found that the inclusion of ATP during protein purification prevents Dmc1 aggregation. ScDmc1 so prepared is capable of forming D-loops and responsive to its accessory factors Rad54 and Rdh54. Negative staining electron microscopy and iterative helical real-space reconstruction revealed that the ScDmc1-ssDNA nucleoprotein filament harbors 6.5 protomers per turn with a pitch of ∼106Å. The ScDmc1 purification procedure and companion molecular analyses should facilitate future studies on this recombinase.
SDGs
Type
journal article