Hinge disulfides in human IgG2 CD40 antibodies modulate receptor signaling by regulation of conformation and flexibility

Orr C, Fisher H, Yu X, Chan C, Gao Y, Duriez P, Booth S, Elliott I, Inzhelevskaya T, Mockridge I, Penfold C, Wagner A, Glennie M, White A, Essex J, Pearson A, Cragg M, Tews I, Science Immunology 7(73) (2022) DOI

SASDLK4 – Human immunoglobulin gamma 2 (IgG2) ChiLob 7/4 F(ab)2 - Heavy chain C224S, kappa chain C214S mutant

ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant
MWexperimental 108 kDa
MWexpected 99 kDa
VPorod 133 nm3
log I(s) 3.22×101 3.22×100 3.22×10-1 3.22×10-2
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant small angle scattering data  s, nm-1
ln I(s)
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant Guinier plot ln 3.22×101 Rg: 4.0 nm 0 (4.0 nm)-2 s2
(sRg)2I(s)/I(0)
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant Kratky plot 1.104 0 3 sRg
p(r)
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant pair distance distribution function Rg: 4.1 nm 0 Dmax: 13.3 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Human immunoglobulin gamma 2 (IgG2) ChiLob 7/4 F(ab)2 - Heavy chain C224S, kappa chain C214S mutant Rg histogram Rg, nm
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant MOLECULAR DYNAMICS FRAME model
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant MOLECULAR DYNAMICS FRAME model
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant MOLECULAR DYNAMICS FRAME model

log I(s)
 s, nm-1
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant MODELLER model

log I(s)
 s, nm-1
ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant SREFLEX model

Synchrotron SAXS data from solutions of Human immunoglobulin gamma 2 (IgG2) ChiLob 7/4 F(ab)2 - Heavy chain C224S, kappa chain C214S mutant in 50 mM HEPES, 150 mM KCl, pH 7.5 were collected on the BM29 beam line at the ESRF storage ring (Grenoble, France) using a Pilatus 1M detector at a sample-detector distance of 2.9 m and at a wavelength of λ = 0.099 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 45.00 μl sample at 20.8 mg/ml was injected at a 0.50 ml/min flow rate onto a GE Superdex 200 10/300 column at 25°C. 2700 successive 1 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.

ChiLob 7/4 IgG2 F(ab)2 C224S/kC214S mutant (C224S/kC214S)
Mol. type   Protein
Olig. state   Monomer
Mon. MW   98.7 kDa
Sequence   FASTA
 
PDB ID   6TKE
 
PDB ID   6TKE
 
PDB ID   6TKE
 
PDB ID   6TKE
 
PDB ID   6TKE