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MetNet - plant pathway - flavonoid biosynthesis
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Pathway details: flavonoid biosynthesis

General info Interaction details Linked pathways Protein-protein interactions
  Pathway was created on Mon Jul 29, 2013.
 Contributed by aracyc:
Flavonoids are secondary metabolites formed from phenylpropanoid and fatty acid derivatives and have important functions, acting as UV-B protectors , attractors of pollinators and seed dispersers, insect feeding attractors, anti-feedants, signal molecules in legume-rhizobium bacteria interactions , and fungicides. Flavonoids have also received a lot of attention due to their effect of human health. In some plant species, flavonoids are required for fertility, but this is not the case in Arabidopsis . Biosynthesis is thought to occur in the cytoplasm through enzymes that are associated with the endoplasmatic reticulum membranes where the enzymes form a large, macromolecular complex . The structure of the major flavonoids in Arabidopsis have recently been described . Under greenhouse conditions, only kaempferol glycosides accumulate in Arabidopsis. With higher UV exposure, quercetin metabolites can be detected as well . Most flavonoids accumulate in the vacuole, the cuticular wax and in the cell wall . Flavonoids constitute a relatively diverse family of aromatic molecules that are derived from Phenylalanine and malonyl-coenzyme A (CoA; via the fatty acidic pathway). There are six major subgroups found in most higher plants: the chalcones, flavones, flavonols, flavandiols, anthocyanins, and condensed tannins (proanthocyanidins); a seventh group, the aurones, are not ubiquitos. Isoflavonoids are found mostly in legumes but also in a small number of non-legume plants and another specialized form of flavonoids, the phlobaphenes (monomers: 3-deoxyanthocyanins), have been detected in only a few species so far. Stilbenes, closely related to flavonoids, are synthesized by yet another group of unrelated species.
  Parts of this pathway occur in:   cytosol     nucleus     endoplasmic reticulum     peroxisome  

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Enzymatic reaction
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metabolite [24]
protein complex [6]
polypeptide [24]
RNA [16]
gene [16]

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