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Transglycosylation reactions

L. K. Ozimek, S. Kralj, M. J. van der Maarel, and L. Dijkhuizen, The levansucrase and inulosucrase enzymes of Lactobacillus reuteri 121 catalyse processive and non-processive transglycosylation reactions, Microbiology, 152 (2006) 1187-1196. [Pg.135]

The structure of the leaving group is a decisive factor for donor properties. Natural substrates for glycosidases are polysaccharidic chains and the corresponding disaccharides are still used in transglycosylation reactions as... [Pg.317]

FIG. l.-Transglycosylation of D-Apiose from UDP-D-apiose (5). (Studies in vitro showed that UDP-D-apiose uridine 5 -[3-C-(hydroxymethyl)-a-D-erythrofiiranosyl pyrophosphate] functions in a transglycosylation reaction. The product is apiin, 4, 5-dihydroxyflavon-7-yl 2-0-[3-C-(hydroxymethyl)-/3-D-erythrofuranosyl]-/8-D-glucopyran-oside (4), formed through the aid of an acceptor molecule.7 Additional products that may be formed by transglycosylation from an apiose donor-molecule include, principally, apiose-containing polysaccharides.)... [Pg.155]

Biosynthetic reactions forming apiose can be divided into decar-boxylative reactions resulting in the biosynthesis of UDP-apiose, and transglycosylation reactions resulting in the transfer of apiose from one compound to another. Formation of apiose in vitro has been extensively investigated in only two species of plants, namely, parsley (P. crispum) and duckweed (L. minor). Enzymes from these sources have been used in demonstrating the formation of apiose in vitro 4- ... [Pg.162]

It should be emphasized that, although lipid-activated sugars provide the only well known mechanism for transglycosylation reactions occurring across a membrane, other mechanisms cannot be precluded. More, active research is needed in order to elucidate the mechanism of synthesis of several plant glycans. [Pg.385]

Systematic research on glycosylamines led to observation of occurrence of the so-called transglycosylation reaction, and the mechanism of this transformation was studied and explained through the following examples, which have practical utility ... [Pg.7]

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See also in sourсe #XX -- [ Pg.158 , Pg.159 ]



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Examples of kinetically controlled transglycosylation reactions

Transglycosylation

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