Functional Relevance of Interleukin-1 Receptor Inter-domain Flexibility for Cytokine Binding and Signaling.

Ge J, Remesh SG, Hammel M, Pan S, Mahan AD, Wang S, Wang X, Structure 27(8):1296-1307.e5 (2019) Europe PMC

SASDE79 – Interleukin-18 receptor 1, IL-18Rα-ECD

Interleukin-18 receptor 1
MWexperimental 55 kDa
MWexpected 36 kDa
VPorod 77 nm3
log I(s) 2.18×102 2.18×101 2.18×100 2.18×10-1
Interleukin-18 receptor 1 small angle scattering data  s, nm-1
ln I(s)
Interleukin-18 receptor 1 Guinier plot ln 2.19×102 Rg: 3.1 nm 0 (3.1 nm)-2 s2
Interleukin-18 receptor 1 Kratky plot 1.104 0 3 sRg
Interleukin-18 receptor 1 pair distance distribution function Rg: 3.3 nm 0 Dmax: 10.9 nm

Data validation

Fits and models

log I(s)
 s, nm-1
Interleukin-18 receptor 1 BILBOMD model
Interleukin-18 receptor 1 BILBOMD model

Synchrotron SAXS data from solutions of Interleukin-18 receptor 1, IL-18Rα-ECD in 10mM HEPES, 150mM NaCl, 3% glycerol, pH 7.2 were measured using size-exclusion chromatography SAXS (SEC-SAXS) on the 12.3.1 (SIBYLS) beam line at the Advanced Light Source (ALS; Berkeley, CA, USA) using a using a MAR 165 CCD detector at a sample-detector distance of 1.5 m and at a wavelength of λ = 0.103 nm (l(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). The data were collected as 600 successive 3 second frames through the SEC elution profile. Sample-elution peak data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted and the individual subtracted data sets were scaled and averaged to generate the scattering profile displayed in this entry.

SEC-SAXS was performed at 20°C using the following parameters: Column: Schodex kw-803 ; Flow rate: 0.5 mL/min; Total acquisition time: 30min; Sample injection concentration: 10 mg/mL; Injection volume: 50 μL.

Interleukin-18 receptor 1
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   36.3 kDa
UniProt   Q13478 (22-329)
Sequence   FASTA