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...

    "Cronopio dentiacutus", a prehistoric mammal (an illustration)
    Mammalian Ancestors

    Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

    Biosecurity and Biocontrol
    Biosecurity and Biocontrol

    This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..

    An artistic depiction of Dunkleosteus fish
    Fish

    The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

    vitamins
    A Balanced Vitamin Diet – Vitamins A – K

    A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..

    Regulation of Biological Systems
    Regulation of Biological Systems

    Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..

    Chemical composition of the body
    Chemical Composition of the Body

    The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..