β-GlcNAc-modified WTA is sufficient to confer langerin
binding.
(A) Schematic overview of the synthetic WTA structures and in vitro glycosylation by recombinant TarS, TarP, or TarM.
(B) Binding of recombinant human langerin-FITC (0.4–25 μg/mL)
to RboP hexamers alone (RboP backbone) or after in vitro glycosylation by TarS, TarP, or TarM. (C) Binding of recombinant
human langerin-FITC (0.4–25 μg/mL) to RboP dodecamers
alone (RboP backbone) or after in vitro glycosylation
similar to RboP hexamers. Binding to β-GlcNAc WTA was assessed
in the absence and presence of EGTA (10 mM). Data for panel B and
C are shown as fluorescence signal + SEM of three independent experiments
and were compared with the negative control (buffer). *p < 0.05, ****p < 0.0001.