Reaction: UDP-α-D-xylose + [protein with EGF-like domain]-L-serine = UDP + [protein with EGF-like domain]-3-O-(β-D-xylosyl)-L-serine
Other name(s): POGLUT1 (gene name) (ambiguous); rumi (gene name) (ambiguous)
Systematic name: UDP-α-D-xylose:[protein with EGF-like domain]-L-serine O-β-xylosyltransferase (configuration-inverting)
Comments: The enzyme, found in animals and insects, xylosylates at the serine in the C-X-S-X-P-C motif of epidermal growth factor-like (EGF-like) domains. The enzyme is bifunctional also being active with UDP-α-glucose as donor (EC 184.108.40.2066, EGF-domain serine glucosyltransferase).
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
1. Li, Z., Fischer, M., Satkunarajah, M., Zhou, D., Withers, S.G. and Rini, J.M. Structural basis of Notch O-glucosylation and O-xylosylation by mammalian protein-O-glucosyltransferase 1 (POGLUT1). Nat. Commun. 8 (2017) 185. [PMID: 28775322]