Glycobiotechnology: Enzymes for the synthesis of nucleotide sugars

  • Lothar Elling
Chapter

Abstract

Complex carbohydrates, as constituting part of glycoconjugates such as glycoproteins, glycolipids, hormones, antibiotics and other secondary metabolities, play an active role in inter-and intracellular communication. The aim of “glycobiotechnology” as an upcoming interdisciplinary research field is to develop highly efficient synthesis strategies, including in vivo and in vitro approaches, in order to bring such complex molecules into analytical and therapeutic studies. The enzymatic synthesis of glycosidic bonds by Leloir-glycosyltransferases is an efficient strategy for obtaining saccharides with absolute stereo- and regioselectivity in high yields and under mild condiitons. There are, however, two obstacles hindering the realization of this process on a biotechnological scale namely the production of recombinant Leloir-glycosyltransferases and the availability of enzymes for the synthesis of nucleotide sugars (the glycosyltransferase donor substrates). The present review surveys some synthetic targets which have attracted the interest of glycobiologists as well as recombinant expression systems which give Leloir-glycosyltransferase activities in the mU and U range. The main part summarizes publications concerned with the complex pathways of primary and secondary nucleotide sugars and the availability and use of these enzymes for synthesis applications. In this context, a survey of our work will demonstrate how enzymes from different sources and pathways can be combined for the synthesis of nucleotide deoxysugars and oligosaccharides.

List of Symbols and Abbreviations

A

Adenine

ADP

Adenosine 5′-diphosphate

ADP-Glc

Adenosine 5′-diphosphate α-d-glucose

C

Cytosine

CDP

Cytidine 5′-diphosphate

CDP-Glc

Cytidine 5′-diphosphate α-d-glucose

Cer

Ceramide

Fruc

d-fructose

Fuc

l-fucose

FucT

Fucosyltransferase

Gal

d-galactose

GalNAc

N-acetyl-d-galactosamine

GalNAcT

N-acetyl-d-galactosaminyltransferase

GalNH2-1-P

Galactosamine-1-phosphate

GalT

Galactosyltransfarase

GDP

Guanosine 5′-diphosphate

GDP-Fuc

Guanosine 5′-diphosphate β-l-fucose

GDP-Man

Guanosine 5′-diphosphate α-d-mannose

Glc-1-P

Glucose-1-phosphate

Glc-6-P

Glucose-6-phosphate

GlcNAc

N-acetyl-d-glucosamine

GlcNAcT

N-acetyl-d-glucosaminyltransferase

in situ Reg

In situ regeneration

LacNAc

N-acetyllactosamine

Le

Lewis blood group

Man

d-mannose

ManT

Mannosyltransferase

NAD

Nicotinamide adenine dinucleotide

NADH

Nicotinamide adenine dinucleotide hydride

Nat

Native

NDP

Nucleoside 5′-diphosphate

NeuAc

N-acetyl neuraminic acid

NMP

Nucleoside 5′-monophosphate

NTP

Nucleoside 5′-triphosphate

PEP

Phosph(enol)pyruvate

PP

Pyrophosphorylase

Pyr

Pyruvate

Rec

Recombinant

Ser

l-serine

SuSy

Sucrose synthase

Thr

l-threonine

dTDP

2′-deoxythymidine 5′-diphosphate

dTDP-Glc

2′-deoxythymidine 5′-diphosphate α-d-glucose

U

Uracil

dU

2′-deoxy-uridine

UDP

Uridine 5′-diphosphate

DUP-Ara

Uridine 5′-diphosphate β-l-arabinose

UDP-Gal

Uridine 5′-diphosphate α-d-galactose

UDP-GalNAc

Uridine 5′-diphosphate N-acetyl-α-d-galactosamine

UDP-GalNH2

Uridine 5′-diphosphate α-d-galactosamine

UDP-Glc

Uridine 5′-diphosphate-α-d-glucose

dUDP-Glc

2′-deoxy-uridine 5′-diphosphate α-d-glucose

UDP-GlcA

Uridine 5′-diphosphate α-d-glucuronic acid

UDP-GlcNAc

Uridine 5′-diphosphate N-acetyl-α-d-glucosamine

UDP-Xyl

Uridine 5′-diphosphate α-d-xylose

UMP

Uridine 5′-diphosphate

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Lothar Elling
    • 1
  1. 1.Institut für EnzymtechnologieJülichGermany

Personalised recommendations