Li de la Sierra-Gallay I,
Le Cam E,
Nucleic Acids Res
SASDGR5 – The Vibrio cholerae DciA/DnaB helicase complex in the presence of bound ATP (VcDnaB.DciA.ATP)
Synchrotron SAXS data from solutions of the DnaB helicase hexamer/DciA complex in 20 mM Tris-HCl, 100 mM NaCl, 1 mM ATP, pH 8.8 were collected on the SWING beam line at SOLEIL (Saint-Aubin, France) using a Eiger 4M detector at a sample-detector distance of 1.8 m and at a wavelength of λ = 0.1033 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 84.00 μl sample at 27.8 mg/ml was injected at a 0.50 ml/min flow rate onto a GE Superdex 200 Increase 10/300 column at 15°C. 700 successive 2.990 second frames were collected. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.
The scattered intensities were displayed on an absolute scale (cm-1) using the scattering of water. Frames were examined individually using the US-SOMO HPLC module and 6 identical frames obtained at the beginning of the elution peak were averaged and further processed.
The complex is constituted of one hexamer of DnaB and three monomers of DciA.