Molecular Insights on the Assembling of ParB1 and ParB1- parS1 Partition Complex

Anu A, Lata S, Chaudhuri B, ACS Bio & Med Chem Au (2026) DOI

SASDVE3 – Probable chromosome-partitioning protein ParB in the presence of cytidine triphosphate (vcParB1-CTP-peak)

Probable chromosome-partitioning protein ParB
MWexperimental 60 kDa
MWexpected 68 kDa
VPorod 124 nm3
log I(s) 1.39×101 1.39×100 1.39×10-1 1.39×10-2
Probable chromosome-partitioning protein ParB small angle scattering data  s, nm-1
ln I(s)
Probable chromosome-partitioning protein ParB Guinier plot ln 1.39×101 Rg: 3.9 nm 0 (3.9 nm)-2 s2
(sRg)2I(s)/I(0)
Probable chromosome-partitioning protein ParB Kratky plot 1.104 0 3 sRg
p(r)
Probable chromosome-partitioning protein ParB pair distance distribution function Rg: 4.2 nm 0 Dmax: 16 nm

Data validation


There are no models related to this curve.

Synchrotron SAXS data from solutions of Probable chromosome-partitioning protein ParB in the presence of cytidine triphosphate (vcParB1-CTP-peak) in 20 mM Tris pH 7.5, 100 mM NaCl, 2% glycerol, 1 mM EDTA, 2 mM DTT, 5 mM MgCl2, 1.2 mM CTP were collected on the BM29 beam line at the ESRF storage ring (Grenoble, France) using a Pilatus 1M detector at a sample-detector distance of 2.8 m and at a wavelength of λ = 0.0999 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 100.00 μl sample at 6 mg/ml was injected at a 0.07 ml/min flow rate onto a GE Superdex 200 Increase 3.2/300 column at 20°C. 960 successive 2 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.

SEC-SAXS run on vcParB1 treated with CTP.

Probable chromosome-partitioning protein ParB (vcParB1-CTP)
Mol. type   Protein
Organism   Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)
Olig. state   Dimer
Mon. MW   34.1 kDa
 
UniProt   Q9KNG7 (2-293)
Sequence   FASTA