Expression, purification, crystallization and preliminary X‐ray analysis of the RecQ helicase catalytic core from
The RecQ proteins are a highly conserved group of DNA helicases which play crucial roles in the maintenance of genome stability. DrRecQ from the radioresistant bacterium Deinococcus radiodurans is a special member of the RecQ family because it contains three Helicase‐and‐RNase‐D‐C‐terminal (HRDC) domains at the C‐terminus. The helicase catalytic core is essential for ATPase and DNA‐unwinding activities. In this work, the helicase catalytic core of DrRecQ was expressed in Escherichia coli, purified and crystallized. Crystals were obtained using the sitting‐drop vapour diffusion method and X‐ray diffraction data were collected to 2.9 Å resolution. The crystals belong to space group P212121, with unit‐cell parameters a = 84.75, b = 95.61, c = 183.83 Å.
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Document Type: Research Article
Publication date: 01 October 2012