Cell surface glycan engineering reveals that matriglycan alone can recapitulate dystroglycan binding and function
作者:M. Osman Sheikh、Chantelle J. Capicciotti、Lin Liu、Jeremy Praissman、Dahai Ding、Daniel G. Mead、Melinda A. Brindley、Tobias Willer、Kevin P. Campbell、Kelley W. Moremen、Lance Wells、Geert-Jan Boons
DOI:10.1038/s41467-022-31205-7
日期:——
microarray, we demonstrate length-dependent binding to Laminin, Lassa virus GP1, and the clinically-important antibody IIH6. Utilizing an enzymatic engineering approach, an N-linked glycoprotein was converted into a IIH6-positive Laminin-binding glycoprotein. Engineering of the surface of cells deficient for either α-DG or O-mannosylation with matriglycans of sufficient length recovers infection with
Functional Characterization and Protein Engineering of a Glycosyltransferase GcCGT to Produce Flavone 6,8-Di-<i>C</i>- and 6-<i>C</i>-4′-<i>O</i>-Glycosides
TcCGT1, which is initiated by the spontaneous deprotonation of the substrate. The spacious binding pocket explains the substrate promiscuity, and the binding pose of the substrate determines C‐ or O‐glycosylation activity. Site‐directed mutagenesis at two residues (I94E and G284K) switched C‐ to O‐glycosylation. TcCGT1 is the first plant CGT with a crystal structure and the first flavone 8‐C‐glycosyltransferase