Dictionary > Mannose

Mannose

Definition
noun
A hexoaldose monosaccharide with a chemical formula of C6H12O6, and an isomer of glucose from manna, the ash Fraxinus ornus, and related plants
Supplement
Monosaccharides are the simplest form of carbohydrates. They may be classified based on the number of constituent carbon atoms. For instance, hexose is a monosaccharide with six carbon atoms. They may also be classified based on the functional group present: aldose and ketose. Mannose is a hexose monosaccharide that belongs to the group of aldoses. As an aldose, mannose has an aldehyde as a functional group.
Mannose is a stereoisomer of glucose. In particular, it is a C-2 epimer of glucose. It occurs in two ring forms: the pyranose form (i.e. a six-membered ring that consists of five carbon atoms and one oxygen atom) and the furanose form (i.e. a five-membered ring consisting of four carbon atoms and one oxygen atom).
In human metabolism, mannose is involved in the glycosylation of certain proteins.
Glucose can be turned into mannose through the Lobry-de Bruyn-van Ekenstein transformation. Another way to produce mannose is by the oxidation of mannitol.
Mannose from the digestion of polysaccharides and glycoproteins is phosphorylated by the enzyme hexokinase. The resulting mannose-6-phosphate can enter the glycolysis when it is converted to fructose-6-phosphate by the enzyme phosphomannose isomerase.
Chemical formula:

  • C6H12O6

Synonym(s):

  • carubinose
  • seminose
  • See also:

    Related term(s):

  • Dolichyl-phosphate-mannose – protein mannosyltrans
  • Mannose-1-phosphate guanylyltransferase
  • Mannose-6-phosphate


    You will also like...

    Cell Biology
    Cell Biology

    The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

    Growth Patterns
    Growth Patterns

    This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

    Homeostatic Mechanisms and Cellular Communication
    Homeostatic Mechanisms and Cellular Communication

    Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

    Structural depiction of catalase, an enzyme
    Protein Activity and Cellular Metabolism

    Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

    Pollution in Freshwater Ecosystems
    Pollution in Freshwater Ecosystems

    There are many environmental factors that arise due to the usage of water in one way or another and for every action tha..