UDP-N-acetyl-5-thio-galactosamine is a substrate of lactose synthase
摘要:
Uridine 5'-(N-acetyl-5-thio-galactosaminyl diphosphate) (UDP-5SGalNAc) was synthesized from an N-acetylgalactosamine derivative via ring opening-recyclization approach. UDP-5SGalNAc was active as a donor substrate for lactose synthase, the complex of galactosyltransferase and lactalbumin, giving the disaccharide mimic (5SGalNAc beta[1-->4]GlcNAc) which has a sulfur in the ring of the non-reducing sugar. The initial rate of the formation of the disaccharide mimic was 0.23% that for the natural disaccharide (GalNAc beta[1-->4]GlcNAc). (C) 1997 Elsevier Science Ltd.
UDP-N-acetyl-5-thio-galactosamine is a substrate of lactose synthase
摘要:
Uridine 5'-(N-acetyl-5-thio-galactosaminyl diphosphate) (UDP-5SGalNAc) was synthesized from an N-acetylgalactosamine derivative via ring opening-recyclization approach. UDP-5SGalNAc was active as a donor substrate for lactose synthase, the complex of galactosyltransferase and lactalbumin, giving the disaccharide mimic (5SGalNAc beta[1-->4]GlcNAc) which has a sulfur in the ring of the non-reducing sugar. The initial rate of the formation of the disaccharide mimic was 0.23% that for the natural disaccharide (GalNAc beta[1-->4]GlcNAc). (C) 1997 Elsevier Science Ltd.