Names | |
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IUPAC name Guanosine 5′-(α-D-mannopyranosyl dihydrogen diphosphate) | |
Systematic IUPAC name O1-{[(2R,3S,4R,5R)-5-(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl} O3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl] dihydrogen diphosphate | |
Identifiers | |
3D model (JSmol) | |
ChEBI | |
ChemSpider | |
MeSH | Guanosine+Diphosphate+Mannose |
PubChem CID | |
UNII | |
CompTox Dashboard (EPA) | |
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Properties | |
C16H25N5O16P2 | |
Molar mass | 605.341 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Guanosine diphosphate mannose or GDP-mannose is a nucleotide sugar that is a substrate for glycosyltransferase reactions in metabolism. This compound is a substrate for enzymes called mannosyltransferases.
Known as donor of activated mannose in all glycolytic reactions, GDP-mannose is essential in eukaryotes. [1]
GDP-mannose is produced from GTP and mannose-6-phosphate by the enzyme mannose-1-phosphate guanylyltransferase (GDP-mannose pyrophosphorylase, GDP-MP). [2] This enzyme belongs to a family of nucleotidyl-transferases and is a pervasive enzyme found in bacteria, fungi, plants, and animals. [3]
Mannans are polymers containing the sugar mannose as a principal component. They are a type of polysaccharide found in hemicellulose, a major source of biomass found in higher plants such as softwoods. These polymers also typically contain two other sugars, galactose and glucose. They are often branched.
Guanosine diphosphate, abbreviated GDP, is a nucleoside diphosphate. It is an ester of pyrophosphoric acid with the nucleoside guanosine. GDP consists of a pyrophosphate group, a pentose sugar ribose, and the nucleobase guanine.
Colitose is a mannose-derived 3,6-dideoxysugar produced by certain bacteria. It is a constituent of the lipopolysaccharide. It is the enantiomer of abequose.
In enzymology, a GDP-mannose 6-dehydrogenase (EC 1.1.1.132) is an enzyme that catalyzes the chemical reaction
In enzymology, a GDP-mannose 3,5-epimerase is an enzyme that catalyzes the chemical reaction
The enzyme GDP-mannose 4,6-dehydratase (EC 4.2.1.47) catalyzes the chemical reaction
In nucleotide sugar metabolism a group of biochemicals known as nucleotide sugars act as donors for sugar residues in the glycosylation reactions that produce polysaccharides. They are substrates for glycosyltransferases. The nucleotide sugars are also intermediates in nucleotide sugar interconversions that produce some of the activated sugars needed for glycosylation reactions. Since most glycosylation takes place in the endoplasmic reticulum and golgi apparatus, there are a large family of nucleotide sugar transporters that allow nucleotide sugars to move from the cytoplasm, where they are produced, into the organelles where they are consumed.
Nucleotide sugars are the activated forms of monosaccharides. Nucleotide sugars act as glycosyl donors in glycosylation reactions. Those reactions are catalyzed by a group of enzymes called glycosyltransferases.
In enzymology, a dolichyl-phosphate beta-D-mannosyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a fucose-1-phosphate guanylyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a glucose-1-phosphate cytidylyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a glucose-1-phosphate guanylyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a glucose-1-phosphate thymidylyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a mannose-1-phosphate guanylyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a mannose-1-phosphate guanylyltransferase (GDP) is an enzyme that catalyzes the chemical reaction
In enzymology, a nucleoside-triphosphate-aldose-1-phosphate nucleotidyltransferase is an enzyme that catalyzes the chemical reaction
In enzymology, a phosphomannan mannosephosphotransferase is an enzyme that catalyzes the chemical reaction
In enzymology, an UTP—hexose-1-phosphate uridylyltransferase is an enzyme that catalyzes the chemical reaction
Thymidine diphosphate glucose is a nucleotide-linked sugar consisting of deoxythymidine diphosphate linked to glucose. It is the starting compound for the syntheses of many deoxysugars.
Cytidine diphosphate glucose, often abbreviated CDP-glucose, is a nucleotide-linked sugar consisting of cytidine diphosphate and glucose. This nucleotide saccharide participates in the synthesis of deoxy sugars such as paratose and tyvelose.