Nucleoid remodeling during environmental adaptation is regulated by HU-dependent DNA bundling.

Remesh SG, Verma SC, Chen JH, Ekman AA, Larabell CA, Adhya S, Hammel M, Nat Commun 11(1):2905 (2020) Europe PMC

SASDFX5 – DNA-binding protein HU-alpha bound to 80 base-pair DNA at pH 5.5 with 50 mM NaCl

80bp_DNA Forward
80bp_DNA Reverse
DNA-binding protein HU-alpha
MWexperimental 350 kDa
MWexpected 59 kDa
log I(s)
80bp_DNA Forward 80bp_DNA Reverse DNA-binding protein HU-alpha small angle scattering data  s, nm-1
(sRg)2I(s)
80bp_DNA Forward 80bp_DNA Reverse DNA-binding protein HU-alpha Kratky plot 0 3 sRg

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of DNA-binding protein HU-alpha bound to 80 base-pair DNA in 10 mM Bis-Tris, 50 mM NaCl, pH 5.5 were collected on the 12.3.1 (SIBYLS) beam line at the Advanced Light Source (ALS) storage ring (Berkeley, CA, USA) using a Pilatus3 X 2M detector at a sample-detector distance of 1.3 m and at a wavelength of λ = 0.103 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). 300 successive 3 second frames were collected at 10°C. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.

SAXS profile corresponds to a protein-DNA complex between bacterial nucleoid associated protein HUalpha and 80bp DNA. Under these conditions, the complex forms lamellar structures visible as Bragg Diffraction peaks.

80bp_DNA Forward
Mol. type   DNA
Organism   Escherichia coli
Olig. state   Monomer
Mon. MW   24.8 kDa
Sequence   FASTA
 
80bp_DNA Reverse
Mol. type   DNA
Organism   Escherichia coli
Olig. state   Monomer
Mon. MW   24.6 kDa
Sequence   FASTA
 
DNA-binding protein HU-alpha
Mol. type   Protein
Organism   Escherichia coli
Olig. state   Unknown
Mon. MW   9.5 kDa
 
UniProt   P0ACF0 (1-90)
Sequence   FASTA