Thermodynamically coupled biosensors for detecting neutralizing antibodies against SARS-CoV-2 variants.

ABSTRACT: We designed a protein biosensor that uses thermodynamic coupling for sensitive and rapid detection of neutralizing antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants in serum. The biosensor is a switchable, caged luciferase-receptor-binding domain (RBD) construct that detects serum-antibody interference with the binding of virus RBD to angiotensin-converting enzyme 2 (ACE-2) as a proxy for neutralization. Our coupling approach does not require target modification and can better distinguish sample-to-sample differences in analyte binding affinity and abundance than traditional competition-based assays.

SUBMITTER: Zhang JZ 

PROVIDER: S-EPMC9463068 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature