Sortase A-mediated functionalization of nanobodies toward surface coupling

Abstract

The conserved LPETG motif, at which sortase A-catalyzed transpeptidation occurs, is engineered at the C-terminal region of the variable domain of single-domain heavy chain antibody (or nanobody) against Vascular Cell Adhesion Molecule 1 (VCAM1). The recombinant nanobody can then subsequently be ligated, under sortase A catalysis, to a variety of oligoglycine containing targets, including material surfaces, contrast labeling molecules and molecules functionalized for specific chemical coupling reactions.