Download MendeleyExpression, Purification, Crystallization and Preliminary X-Ray Diffraction Analysis of the Ddx3 RNA Helicase Domain.
Rodamilans, B., Montoya, G.(2007) Acta Crystallogr Sect F Struct Biol Cryst Commun 63: 283
- PubMed: 17401195
- DOI: https://doi.org/10.1107/S1744309107006434
- Primary Citation of Related Structures:
2JGN - PubMed Abstract:
DDX3 is a human RNA helicase that is involved in RNA processing and important human diseases. This enzyme belongs to the DEAD-box protein family, the members of which are characterized by the presence of nine conserved motifs including the Asp-Glu-Ala-Asp motif that defines the family. DDX3 has two distinct domains: an ATP-binding domain in the central region of the protein and a helicase domain in the carboxy-terminal region. The helicase domain of DDX3 was cloned and overexpressed in Escherichia coli. Crystallization experiments yielded crystals that were suitable for X-ray diffraction analysis. The final crystallization conditions were a reservoir solution consisting of 2 M ammonium sulfate, 0.1 M imidazole pH 6.4 plus 5 mM spermine tetrahydrochloride and a protein solution containing 10 mM HEPES, 500 mM ammonium sulfate pH 8.0. The crystals of the helicase domain belong to the monoclinic space group P2(1), with unit-cell parameters a = 43.85, b = 60.72, c = 88.39 A, alpha = gamma = 90, beta = 101.02 degrees , and contained three molecules per asymmetric unit. These crystals diffracted to a resolution limit of 2.2 A using synchrotron radiation at the European Synchrotron Radiation Facility (ESRF) and the Swiss Light Source (SLS).
Organizational Affiliation:
Structural Biology and Biocomputing Programme, Spanish National Cancer Centre (CNIO) Macromolecular Crystallography Group, c/Melchor Fdez Almagro 3, 28029 Madrid, Spain.
