Polymorphic Protective Dps-DNA Co-Crystals by Cryo Electron Tomography and Small Angle X-Ray Scattering.

Kamyshinsky R, Chesnokov Y, Dadinova L, Mozhaev A, Orlov I, Petoukhov M, Orekhov A, Shtykova E, Vasiliev A, Biomolecules 10(1) (2019) Europe PMC

SASDKE4 – Polymorphic DNA protection during starvation protein (Dps)-DNA сo-сrystals

DNA protection during starvation protein
MWexperimental 224 kDa
MWexpected 224 kDa
log I(s) 8.00×10-1 8.00×10-2 8.00×10-3 8.00×10-4
DNA protection during starvation protein small angle scattering data  s, nm-1
(sRg)2I(s)/I(0)
DNA protection during starvation protein Kratky plot 1.104 0 3 sRg

Data validation


There are no models related to this curve.

Synchrotron SAXS data from in cellulo Dps-DNA co-crystalls were collected on the EMBL-P12 BioSAXS beamline at the PETRAIII storage ring (DESY, Hamburg, Germany) equipped with a robotic sample changer and a 2D photon counting pixel X-ray detector Pilatus 2M. The scattering intensity I(s) was recorded in the range of the momentum transfer 0.02 < s < 4.0 nm-1, where s = 4πsinθ/λ, and 2θ is the scattering angle, λ= 0.124 nm is the X-ray wavelength. The measurements were carried out in 10 mM Tris-HCl, 100 mM NaCl, 0.5 mM EDTA, pH 7.5 buffer. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.

NOTE: Data validation metrics do not apply for this entry (Rg, I(0), MW, etc). The quoted 'experimental MW' is that of the dodecameric protein calculated from the amino acid sequence. The monomer MW is quoted at 19 kDa.

DNA protection during starvation protein (Dps)
Mol. type   Protein
Organism   Escherichia coli (strain K12)
Olig. state   Dodecamer
Mon. MW   18.7 kDa
 
UniProt   P0ABT2
Sequence   FASTA