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

SASDVB4 – β-Antigen C Protein B75KN-CTD domain bound to Leukocyte Immunoglobulin-Like Receptor LILR-B3

Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R)
IgA FC receptor (N770H)
MWexperimental 78 kDa
MWexpected 59 kDa
VPorod 175 nm3
log I(s) 7.22×101 7.22×100 7.22×10-1 7.22×10-2
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) IgA FC receptor (N770H) small angle scattering data  s, nm-1
ln I(s)
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) IgA FC receptor (N770H) Guinier plot ln 7.23×101 Rg: 3.9 nm 0 (3.9 nm)-2 s2
(sRg)2I(s)/I(0)
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) IgA FC receptor (N770H) Kratky plot 1.104 0 3 sRg
p(r)
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) IgA FC receptor (N770H) pair distance distribution function Rg: 3.9 nm 0 Dmax: 14.1 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Leukocyte immunoglobulin-like receptor subfamily B member 3 (P288R) IgA FC receptor (N770H) 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.

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
 
IgA FC receptor (N770H) (B75KN-CTD)
Mol. type   Protein
Organism   Streptococcus agalactiae
Olig. state   Monomer
Mon. MW   11.5 kDa
 
UniProt   P27951 (725-826)
Sequence   FASTA