Anti-EDIII of DENV2 [2C8]

Absolute Antibody

Anti-EDIII of DENV2 [2C8]

9

The antibody binds to domain III of the envelope (E) protein of Dengue virus. In particular, it recognizes the N-terminal region of EDIII (DIII-DI hinge residues 298-303) and the BC loop (residues 328-334), and residues K361, V282, E383 and P384. The anti

Binding avidity/affinity of both Full length (IgG) and Fab fragments of the antibody to whole virion measured by ELISA. The crystal structure of the Fab fragment in complex with EDIII of DENV2 NGC was determined. Focus reduction neutralization assays showed highly potent neutralization of DENV2 NGC and 16681 for the antibody (IgG2a) with 50% neutralization titers in the sub-nanomolar range (50% FRNT at 0.025 nM). Pre- and postattachment neutralization assays showed the antibody is capable of significantly inhibiting infection after the virus had bound to the cells. The antibody has strong capacity to promote antibody dependent enhancement (ADE). ADE was analysed using U937 cells, the antibody demonstrated typical infection enhancement with peak titers of over 1000-fold enhancement over background and a wide range of concentrations at which enhancement occurred. The humanized version of the antibody (human IgG1) showed enhancement for DENV2/16681 and DENV2/NGC. Surface plasmon resonance assay was performed to evaluate the binding specificity and affinity between the antibody and recombinant EDIII (Kd= 176.7 nM) (Renner et al., 2018; PMID: 30323338).

ELISA, Neutralisation/Blocking, Other Application

Research Use Only

Monoclonal

2C8

Mouse

IgG2a

Virus

-20°C,2°C to 8°C

12352203