Structural basis for IL-33 recognition and its antagonism by the helminth effector protein HpARI2.

Jamwal A, Colomb F, McSorley HJ, Higgins MK, Nat Commun 15(1):5226 (2024) Europe PMC

SASDUY6 – Alarmin release inhibitor (HpARI2), full length, bound to Interleukin-33

Alarmin release inhibitor (Δ1-62)
Interleukin-33 (L179V)
MWI(0) 39 kDa
MWexpected 44 kDa
VPorod 62 nm3
log I(s) 6.28×10-2 6.28×10-3 6.28×10-4 6.28×10-5
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) small angle scattering data  s, nm-1
ln I(s)
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) Guinier plot ln 6.29×10-2 Rg: 2.7 nm 0 (2.7 nm)-2 s2
(sRg)2I(s)/I(0)
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) Kratky plot 1.104 0 3 sRg
p(r)
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) pair distance distribution function Rg: 2.7 nm 0 Dmax: 9.7 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) DAMMIF model

log I(s)
 s, nm-1
Alarmin release inhibitor (Δ1-62) Interleukin-33 (L179V) ALPHAFOLD model

Synchrotron SAXS data from solutions of alarmin release inhibitor bound to Interleukin-33 in 137 mM NaCl, 2.7 mM KCl, 10 mM phosphate buffer, 5% glycerol, pH 7.2 were collected on the B21 beam line at the Diamond Light Source (Didcot, UK) using a Eiger 4M detector at a sample-detector distance of 3.7 m and at a wavelength of λ = 0.09464 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). One solute concentration of 8.00 mg/ml was measured at 15°C. 600 successive 3 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.

Alarmin release inhibitor (Δ1-62) (HpARI2)
Mol. type   Protein
Organism   Heligmosomoides polygyrus
Olig. state   Monomer
Mon. MW   26.0 kDa
 
UniProt   A0A3P7XL18 (63-297)
Sequence   FASTA
 
Interleukin-33 (L179V)
Mol. type   Protein
Organism   Mus musculus
Olig. state   Monomer
Mon. MW   17.6 kDa
 
UniProt   Q8BVZ5 (109-266)
Sequence   FASTA