Notch-modifying xylosyltransferase structures support an SNi-like retaining mechanism.
Yu, H., Takeuchi, M., LeBarron, J., Kantharia, J., London, E., Bakker, H., Haltiwanger, R.S., Li, H., Takeuchi, H.(2015) Nat Chem Biol 11: 847-854
- PubMed: 26414444 
- DOI: 10.1038/nchembio.1927
- Primary Citation of Related Structures:  
4WLG, 4WLM, 4WLZ, 4WM0, 4WMA, 4WMB, 4WMI, 4WMK, 4WN2 - PubMed Abstract: 
A major question remaining in glycobiology is how a glycosyltransferase (GT) that retains the anomeric linkage of a sugar catalyzes the reaction. Xyloside α-1,3-xylosyltransferase (XXYLT1) is a retaining GT that regulates Notch receptor activation by adding xylose to the Notch extracellular domain ...