In chapter 1 Y. Hirabayashi and S. S. Ichikava consider glucosyltransferases and UDP-glucoseceramide glucosyltransferase. The latter is widely distributed in animal and plant tissues. Since glucosylceramide is a precursor for many glycosphingolipids, this enzyme plays a key role in the biosynthesis of these compounds.
Chapters 2-8 deal with various types of galactosyltransferases such as beta4-galactosyltransferase I (by N. Shaper and J. Shaper), beta4-galactosyltransferases II, III, IV, V, VI, and VII (by K. Furukawa and H. Clausen), beta3-galactosyltransferases I, II, and III (T. Hennet and E. Berger), beta3-galactosyltransferase IV (GM1-synthase) (K. Furukawa), beta3-galactosyltransferase V (H. Narimatsu), alpha3-galactosyltransferase (D. van den Eijnden and D. Joziasse), and galactosylceramide synthase (W. Stoffel).
Chapters 9-21 consider various types of N-acetylglucosaminyltransferases. Substrate specificity of various N-acetylglucosaminyltransferases is considered by P. Stanley (N-acetylglucosaminyltransferase I), H. Shachter (N-acetylglucosaminyltransferase II), Y. Ikede and N. Taniguchi (N-acetylglucosaminyltransferase III), M. Minova et al. (N-acetylglucosaminyltransferase IV), J. Dennis (N-acetylglucosaminyltransferase V), K. Honke and N. Taniguchi (N-acetylglucosaminyltransferase VI). Several chapters of this section deal with beta3-N-acetylglucosaminyltransferases (R. Haltivanger and M. Fukuda), beta6-N-acetylglucosaminyltransferases I, II, and III, which attach N-acetylglucosamine to protein cores type 2 (M. Fukuda et al., M. Fukuda, J. Yeh), alpha4-N-acetylglucosaminyltransferase (J. Nakajama), and O-GlcNAc-transferase (S. Iyer and G. Hart).
Chapter 22-26 also deal with N-acetylglucosaminyltransferases. F. Hagen et al. review polypeptide N-acetylglucosaminyltransferases, K. Furukawa considers beta4-N-acetylglucosaminyltransferase. Transferases involved into biosynthesis of substances of A and B blood groups are considered by S. Hakomori. K. Honke considers glycolipid synthase involved into biosynthesis of Forsmann glycolipid.
Chapters 27-34 summarize data on fucosyltransferases. These include alpha-2-fucosyltransferases (R. Oriol and R. Mollicone), alpha3/4-fucosyltransferases (H. Narimatsu), alpha3-fucosyltransferases IV, V, VI, VII, and IX (H. Narimatsu), and also alpha6-fucosyltransferase VIII (E. Miyoshi and N. Taniguchi).
One of the largest sections (chapters 35-53) of this book was reserved for sialyltransferases, including alpha2,3-sialyltransferases I, II, III, IV, V (M. Fukuda, J. Marth; T. Hamamoto, S. Tsuji; S. Kitazume-Kawaguchi, S. Tsuji; M. Saito, A. Ishii), alpha2,6-sialyltransferases, which catalyze addition of N-acetylneuraminic acid to galactose (T. Hamamoto, S. Tsuji) and to N-acetylgalactosamine (N. Kurosava, S. Tsuji; S. Takashima, S. Tsuji). Some chapters of this section deal with alpha2,8-sialyltransferases catalyzing addition of N-acetylneuraminic acid (NANA) to terminal NANA residues in carbohydrate chains of glycoproteins and glycolipids (Y. Sanai, N. Kojima, S. Tsuji, Y. Yoshida, J. Nakayama et al.). Properties and substrate specificity of alpha2,8-sialyltransferases, members of this group of enzymes catalyzing biosynthesis of polysialic chains, which may contain up to several tens of sialic acid residues, are analyzed. In a separate chapter, A. Suzuki considers CMP-NANA hydroxylase, which catalyzes conversion of CMP-NANA into CMP-N-glycolylneuraminic acid. Hydroxylation reaction requires the enzymatic complex containing cytochrome b5, NADH-cytochrome b5 reductase, CMP-NANA hydroxylase, and also NADH.
Chapters 51-53 summarize data on glucuronyltransferases. One of these enzymes, HNK-1-glucuronyltransferase, is involved in biosynthesis of carbohydrate chains of HNK-1-carbohydrate epitope, which is a sulfated trisaccharide SO4-3GlcAbeta1-3Galbeta1-4GlcNAc. The latter is a component of such biologically important molecules as NCAM (nervous cell adhesive molecule), myelin associated glycoprotein, telencephalin, etc. (S. Oka, T. Kawasaki). This section also deals with two glucuronyltransferases (GT), glycosaminoglycan-GT1 (H. Kitagawa, K. Sugahara), and UDP-glucose dehydrogenase (A. Spicer). The latter is the key enzyme of biosynthesis of glycosaminoglycans; it also plays an important role during toxin detoxication and metabolism of such endogenous substrates as steroids, heme pigments, and thyroxin.
Glycosyltransferases involved in biosynthesis of glycosaminoglycans are considered in chapters 54-57. These include alpha4-N-acetylhexosaminyltransferase (H. Kitagawa, K. Sugahara), hyaluronan synthases 1, 2, and 3 (K. Kimata), heparan sulfate GlcA/GlcNAc transferase (M. Kusche-Gullberg, U. Lindahl), and D-glucuronyl-C5-epimerase (J. Li, U. Lindahl).
A big section of the book (chapters 58-73) is devoted to sulfotransferases. Most of these enzymes sulfate carbohydrate chains in proteoglycans, glycolipids, and glycoproteins.
A separate section (chapters 74-76) deals with transporters of UDP-galactose, UDP-N-acetylglucosamine, and CMP-sialic acid.
Chapters 77-82 highlight dolichol derivatives involved in certain processes of biosynthesis of glycoconjugates.
Chapters 83-89 consider enzymes involved into processing of N-glycans: phosphomannose isomerase, alpha-mannosidase II, GlcNAc-1 phosphotransferase, and others.
Each chapter not only contains a bibliography of the most important papers in each field, but also refers readers to principally important reviews and monographs for further reading. Such recommendations help the readers to get deeper penetration into particular problems discussed in each chapter. In each chapter much attention is also paid to biological aspects of glycosyltransferases, their genetic control, and impairments appearing as the result of mutations in corresponding genes.
This book contains an alphabetic index and maps of metabolic reactions of biosynthesis of N- and O-glycans, glycosphingolipids, and proteoglycans.
This book is quite valuable theoretically and methodologically for specialists of various fields of glycobiology, biochemistry, biotechnology, and medicine. I believe that this book will become an important desk book for researchers working with glycosyltransferases.
G. Ya. Wiederschain, Doctor of Biological Sciences