8 results about "Nucleoside diphosphate" patented technology

Disclosed are methods and compositions for glycosylation of a sugar acceptor, comprising the steps of: (i) converting an exogenous nucleoside triphosphate (NTP) to a nucleoside diphosphate (NDP); (ii) converting the NDP to NDP-sugar, comprising contacting at least one Leloir glycosyltransferase (GT) with the NDP and an exogenous sugar donor (SD) in a reaction medium; and (iii) converting a sugar acceptor (SA) to a glycosylated SA, comprising contacting the at least one GT with the NDP-sugar and the SA in the reaction medium.

The application relates to the technical field of biological medicine, and discloses a nucleoside diphosphate compound and a preparation method thereof. The compound has the structure shown in formula (I). The preparation method of the nucleoside compound comprises the following steps: contacting a compound shown in formula (I-2) with a compound shown in formula (I-1) to perform a contact reaction I. The aforementioned nucleoside compound provided by the application has excellent inhibitory activity on CD73, and in-vivo experiments show that the compound has good antitumor activity.

The present invention relates to a method for the synthesis of 6-azido-6-deoxy-2-N-acetyl-monosaccharide-nucleotide diphosphates, in particular 6-azido-6-deoxy-2-N-acetyl-D-galactosamine-nucleotide diphosphate or 6-azido-6-deoxy-2-N-acetyl-D-glucosamine-nucleotide diphosphate. The synthesis method according to the present invention is characterized by high efficiency and high yield. Another part of the present invention is a key intermediate of the method.

To provide a method for producing rebaudioside D and rebaudioside M by reaction of glycosyltransferase, and to provide a composition for producing rebaudioside D and rebaudioside M containing glycosyltransferase.SOLUTION: Provided is a method for preparing rebaudioside D, the method including preparing rebaudioside D by reacting glucose-linked nucleotide diphosphate with rebaudioside A in the presence of glycosyltransferase B (UGT-B), wherein the glycosyltransferase B is at least one protein selected from the group consisting of proteins consisting of an amino acid sequence represented by a specific sequence.SELECTED DRAWING: Figure 1

The present invention provides engineered adenylyl-sulfate kinase polypeptides capable of adding a phosphate group to the 3' position of the sugar of a natural or modified nucleoside diphosphate, as well as compositions and methods of utilizing these engineered polypeptides.

To provide an improved method for producing a sugar nucleoside diphosphate in the field of a functionalized nucleoside sugar.SOLUTION: A method for the chemical conversion of GalNAc or GlcNAc to its respective 6-azido derivative via a cyclic sulfate, followed by conversion to the respective UDP derivative via an anomeric phosphorylation step and a UMP coupling step, wherein a 6-azido-6-deoxy monosaccharide compound having the structure (I) is prepared according to the following scheme: SELECTED DRAWING: None

This invention relates to a method for synthesizing 6-azido-6-deoxy-2-N-acetyl-monosaccharide-nucleoside diphosphate, particularly 6-azido-6-deoxy-2-N-acetyl-D-galactosamine-nucleoside diphosphate or 6-azido-6-deoxy-2-N-acetyl-D-glucosamine-nucleoside diphosphate. The synthetic method according to the invention is characterized by high efficiency and high yield. Another part of the invention concerns the key intermediates of this method.

Disclosed is a method for evaluating the oxidative activity of a dehydrogenase, which comprises a step in which the dehydrogenase and the DT-diaphorase are subjected to a catalytic oxidation-reduction reaction in an aqueous solution containing one molecule of the dehydrogenase, a substrate for the dehydrogenase, a nucleoside diphosphate derivative, the DT-diaphorase, and a fluorescent probe, and fluorescence after the reaction is measured.