Solution structures of glycosaminoglycan-bound CXCL8 complexes determined by small-angle X-ray scattering (SAXS).

White MA Mahler BP, Joseph PRB, Nagarajan B, Wang X, Desai UR, Rajarathnam K, Biochem J 483(10):1861-1876 (2026) Europe PMC

SASD2R2 – Interleukin-8-Chondroitin sulphate (CXCL8:CS08)

Chondroitin sulfate 8-mer
INTERLEUKIN 8
MWI(0) 28 kDa
MWexpected 18 kDa
log I(s) 2.76×104 2.76×103 2.76×102 2.76×101
Chondroitin sulfate 8-mer INTERLEUKIN 8 small angle scattering data  s, nm-1
ln I(s)
Chondroitin sulfate 8-mer INTERLEUKIN 8 Guinier plot ln 2.77×104 Rg: 1.7 nm 0 (1.7 nm)-2 s2
(sRg)2I(s)/I(0)
Chondroitin sulfate 8-mer INTERLEUKIN 8 Kratky plot 1.104 0 3 sRg
p(r)
Chondroitin sulfate 8-mer INTERLEUKIN 8 pair distance distribution function Rg: 1.7 nm 0 Dmax: 6.6 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Chondroitin sulfate 8-mer INTERLEUKIN 8 CUSTOM IN-HOUSE model

SAXS data from solutions of Interleukin-8-Chondroitin sulphate (CXCL8:CS08) in 50 mM phosphate, pH 7 were collected on the Rigaku BioSAXS-1000 instrument (Sealy Center For Structural Biology, UTMB-G, Galveston, TX, USA) using a Pilatus 100K detector at a sample-detector distance of 0.5 m and at a wavelength of λ = 0.15418 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 10.00 mg/ml was measured at 5°C. Eight successive 3600 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.

Chondroitin sulfate 8-mer (CS08)
Mol. type   Other
Organism   NA
Olig. state   Monomer
Mon. MW   1.8 kDa
Chemical formula
 
INTERLEUKIN 8 (CXCL8)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Dimer
Mon. MW   8.0 kDa
 
UniProt   P10145 (28-99)
Sequence   FASTA