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Synchrotron SAXS data from solutions of Immunoglobulin domains 4,5,6,7 of Nucleoporin Pom152 (Pom152 Ig-4,5,6,7: amino acids 718-1148) in 10mM HEPES, 150mM NaCl, 10%(v/v) glycerol, 5mM DTT, pH 7.5 were collected on the BL4-2 beam line at the Stanford Synchrotron Radiation Lightsource (SSRL) (Stanford, CA, USA) using a Rayonix MX225-HE detector at a sample-detector distance of 1.7 m and at a wavelength of λ = 0.098 nm (I(s) vs s, where = 4πsinθ/λ and 2θ is the scattering angle). Solute concentrations ranging between 0.5 and 10 mg/ml were measured at 15°C. 20 successive 1 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 and the different curves were scaled for protein concentration. The low angle data collected at lower concentration were merged with the highest concentration high angle data to yield the final composite scattering curve.
Guinier Rg and I(0) were calculated using AutoRg. The experimental MW was estimated using SAXSMOW.
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s, nm-1
