An Anomalous Small-Angle X-Ray Scattering Study of the Formation of Iron Clusters in the Inner Cavity of the Ferritin-Like Protein Dps

Gordienko A, Mozhaev A, Gibizova V, Dadinova L
Moscow University Physics Bulletin 77(6):858-867 (2023 Feb 15)

doi: 10.3103/S0027134922060054 		Submitted to SASBDB: 2022 Aug 15
Published in SASBDB:

SASDPX7 – DNA protection during starvation protein (Dps) loaded with FeSO4⋅7H2O in the amount corresponding to 50 iron atoms per dodecamer. Anomalous SAXS spanning the X-ray Fe-absorption edge 7.100-7.133 keV.

DNA protection during starvation protein experimental SAS data
DAMMIN model
Sample: DNA protection during starvation protein dodecamer, 224 kDa Escherichia coli (strain … protein
Buffer: 50 mM NaCl, 0.5 mM EDTA, 50 mM Tris-HCl, pH: 8
Experiment: SAXS data collected at EMBL P12, PETRA III on 2021 Oct 5
RgGuinier 3.8 nm
Dmax 14.0 nm
VolumePorod 32 nm3

SASDPY7 – DNA protection during starvation protein (Dps) loaded with FeSO4⋅7H2O in the amount corresponding to 500 iron atoms per dodecamer. Anomalous SAXS spanning the X-ray Fe-absorption edge 7.100-7.133 keV.

DNA protection during starvation protein experimental SAS data
DAMMIN model
Sample: DNA protection during starvation protein dodecamer, 224 kDa Escherichia coli (strain … protein
Buffer: 50 mM NaCl, 0.5 mM EDTA, 50 mM Tris-HCl, pH: 8
Experiment: SAXS data collected at EMBL P12, PETRA III on 2021 Oct 5
RgGuinier 7.4 nm
Dmax 12.0 nm

SASDPZ7 – DNA protection during starvation protein (Dps) loaded with FeSO4⋅7H2O in the amount corresponding to 2000 iron atoms per dodecamer. Anomalous SAXS spanning the X-ray Fe-absorption edge 7.100-7.133 keV.

DNA protection during starvation protein experimental SAS data
DAMMIN model
Sample: DNA protection during starvation protein dodecamer, 224 kDa Escherichia coli (strain … protein
Buffer: 50 mM NaCl, 0.5 mM EDTA, 50 mM Tris-HCl, pH: 8
Experiment: SAXS data collected at EMBL P12, PETRA III on 2021 Oct 5
RgGuinier 7.1 nm
Dmax 14.0 nm