-acetylgalactosamine
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United States of America Patent
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Mar 8, 2011
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Oct 18, 2005
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Oct 21, 2004
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Abstract
The present invention provides a method for enzymatically producing uridine 5′-diphospho-N-acetylgalactosamine (UDP-GalNAc) (which is an important substrate for oligosaccharide synthesis) from uridine 5′-triphosphate (UTP) and N-acetylgalactosamine 1-phosphate (GalNAc 1-P), the method including using, as an enzyme, uridine 5′-diphospho-N-acetylglucosamine pyrophosphorylase (UDP-GlcNAc pyrophosphorylase) derived from a microorganism (exclusive of a pathogenic microorganism). The GalNAc 1-P employed can be prepared from N-acetylgalactosamine and a phosphate donor in a reaction system by use of N-acetylgalactosamine kinase. According to the present invention, uridine 5′-diphospho-N-acetylgalactosamine can be efficiently produced by use of a relatively inexpensive substrate.
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