Bacterial targeting of the neutrophil inhibitory receptor LILRB3 to evade antibody immunity.

Rumpret M, Lewis Marffy AL, Zhang Y van Woudenbergh E, van der Lans SPA, Xu X, Fu Z, Zhao Y, Catton EA, Paré G, McGregor F, Spiller OB, Fernandes MJ, de Haas CJC, van Strijp JAG, van Sorge NM, Geisbrecht BV, McCarthy AJ, Nat Commun (2026) Europe PMC

SASDVA4 – β-Antigen C Protein B6C domain bound to Leukocyte Immunoglobulin-Like Receptor LILR-B3

IgA FC receptor
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R)
MWexperimental 87 kDa
MWexpected 67 kDa
VPorod 202 nm3
log I(s) 9.00×101 9.00×100 9.00×10-1 9.00×10-2
IgA FC receptor Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) small angle scattering data  s, nm-1
ln I(s)
IgA FC receptor Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) Guinier plot ln 9.01×101 Rg: 3.9 nm 0 (3.9 nm)-2 s2
(sRg)2I(s)/I(0)
IgA FC receptor Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) Kratky plot 1.104 0 3 sRg
p(r)
IgA FC receptor Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) pair distance distribution function Rg: 4.0 nm 0 Dmax: 13.5 nm

Data validation


Fits and models


log I(s)
 s, nm-1
IgA FC receptor Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) MULTIFOXS model

Size-exclusion chromatography coupled small-angle X-ray scattering (SEC-SAXS) data of B75KN-CTD bound to LILRB3 were obtained using the SIBYLS beamline 12.3.1 at the Advanced Light Source, Lawrence Berkeley National Laboratory. The experiments were conducted with a sample-to-detector distance of 2.1 m and a wavelength. λ, of 0.1127 nm, yielding scattering vectors (s) ranging from 0.1 nm⁻¹ to 4 nm⁻¹. The scattering vector, s, is calculated using the equation s = 4πsinθ/λ, where 2θ represents the scattering angle. Size-exclusion chromatography (SEC) was performed using an Agilent 1260 series HPLC with a Shodex analytical column. A 60 μl sample at a 5 mg/ml protein concentration was injected at a flow rate of 0.65 ml/min onto a Shodex KW-803 column at 4°C. A total of 906 successive 2-second frames were captured. Subsequently, data normalization was conducted against the intensity of the transmitted beam, followed by radial averaging, and subtraction of the scattering from a solvent blank.

IgA FC receptor (B6C)
Mol. type   Protein
Organism   Streptococcus agalactiae
Olig. state   Monomer
Mon. MW   19.8 kDa
 
UniProt   P27951 (258-428)
Sequence   FASTA
 
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) (LILRB3)
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   47.0 kDa
 
UniProt   A0A0G2JM46 (24-443)
Sequence   FASTA