2.4.1.222 additional information ligand-receptor interactions and role of fringe glycosylation, regulation of signaling, overview, Fringe proteins do not influence the surface expression of Notch1 2.4.1.222 additional information Fringe elongates O-fucose residues on EGF-like repeat 4 and 5 of Notch3. Fringe plays a role in CADASIL pathophysiology 2.4.1.222 additional information Fringe is required for the differentiation of polar cell precursors. Fringe is necessary for generating positional information in localizing a high-affinity interaction between Notch and its ligand Delta, even if a second ligand is not essential 2.4.1.222 additional information the glycosyltransferase Fringe promotes Delta-Notch signaling between neurons and glia, and is required for subtype-specific glial gene expression 2.4.1.222 additional information transfers a beta-D-GlcNAc residue from UDP-D-GlcNAc to the fucose residue of a fucosylated protein acceptor 2.4.1.222 additional information LFNG, Lunatic Fringe, and MFNG, Manic Fringe, transfer N-acetylglucosamine (GlcNAc) to O-fucose attached to EGF-like repeats of NOTCH receptors 2.4.1.222 additional information O-GlcNAc is added to Notch by an enzymatic activity distinct from the well-known nuclear/cytoplasmic O-GlcNAc transferase, OGT, EC 2.4.1.255 2.4.1.222 additional information Drosophila Fringe glycosyltransferase adds GlcNAc specifically to the O-fucose residues of Notch transmembrane proteins 2.4.1.222 additional information the enzyme adds N-acetylglucosamine to O-linked fucose residues on epidermal growth factor repeats of Notch 2.4.1.222 additional information the enzyme adds N-acetylglucosamine to O-linked fucose residues on epidermal growth factor repeats of Notch. Lfng inhibits activation of Notch1 and Notch4 in basal cells of the mouse prostate gland while enhancing Notch3 activation