Article (Scientific journals)
A novel three-enzyme reaction cycle for the synthesis of N-acetyllactosamine with in situ regeneration of uridine 5'-diphosphate glucose and uridine 5'-diphosphate galactose
Zervosen, Astrid; Elling, Lothar
1996In Journal of the American Chemical Society, 118 (8), p. 1836-1840
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Keywords :
LacNAc; in situ regeneration; enzymatic synthesis; beta-1,4-galactosyltransferase; alpha-2,6-sialyltransferase
Abstract :
[en] A new three-enzyme reaction cycle consisting of sucrose synthase, UDP glucose 4‘-epimerase, and human β-1,4-galactosyltransferase was established for the synthesis of N-acetyllactosamine (LacNAc) with in situ regeneration of UDP galactose. We found that UDP glucose 4‘-epimerase is reductively inactivated in the presence of UMP and acceptor substrates of β-1,4-galactosyltransferase. Reactivation of UDP glucose 4‘-epimerase by the transition state analogues dUDP or dTDP 6-deoxy-d-xylo-4-hexulose in combination with the repetitive batch technique enabled us to use the native enzymes for 11 days in this cycle. With 10 U of sucrose synthase, 5 U of UDP glucose 4‘-epimerase, and 1.25 U of β-1,4-galactosyltransferase, 594 mg of LacNAc could be synthesized. N-Acetyllactosamine was also subsequently converted to Neu5Acα2,6Galβl,4GlcNAc with α-2,6-sialyltransferase and CMP-Neu5Ac.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Zervosen, Astrid ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Elling, Lothar
Language :
English
Title :
A novel three-enzyme reaction cycle for the synthesis of N-acetyllactosamine with in situ regeneration of uridine 5'-diphosphate glucose and uridine 5'-diphosphate galactose
Publication date :
1996
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
eISSN :
1520-5126
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
118
Issue :
8
Pages :
1836-1840
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 July 2009

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