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


General info Interaction details Linked pathways Protein-protein interactions
Notes
  Pathway was created on Mon Jul 29, 2013.
 Contributed by aracyc:
Plant volatiles contribute to aroma, flavor and scents of plants. . They are produced by the terminal branches of primary metabolic pathways. A single reaction and enzyme can convert a primary metabolite into a volatile compound. phenylacetaldehyde and 2-phenylethanol are two such aroma volatiles derived from phenylalanine . Both compounds have pleasant fruity, floral smells and are major contributors of scent in many flowers. phenylacetaldehyde is the major scent volatile of hyacinth and lilac. 2-phenylethanol is the major aroma volatile associated with roses . In tomato, both these compounds are a big impact on the fruit's flavor and the rapid interconversion of phenylacetaldehyde to 2-phenylethanol in vivo has been demonstrated . They also act as powerful insect attractants and each attracts different sets of pollinating and predatory insects. Despite the multiple roles these compounds play, little is known about their biosynthesis in plants. In yeast, 2-phenylethanol is produced from phenylalanine via phenylpyruvate and phenylacetaldehyde . In petunia and tomato, the biosynthesis of 2-phenylethanol appears to have evolved into distinct pathways. The tomato enzymes catalyze the simple conversion of phenylalanine to phenylethylamine, whereas the petunia enzyme is a complex one and catalyzes the efficient coupling of phenylalanine decarboxylation to oxidation, generating phenylacetaldehyde, ammonia, H2O2 and CO2 in stoichiometric amounts . The biosynthesis of these compounds has not been studied in Arabidopsis, but, there is evidence that Arabidopsis thaliana produces both phenylacetaldehyde and 2-phenylethanol in siliques, leaves, and inflorescences of plants generated through in vitro cultivation .
  Parts of this pathway occur in:   cytosol     plastid     nucleus     endoplasmic reticulum     mitochondrion  


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Enzymatic reaction
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metabolite [29]
protein complex [4]
RNA [58]
polypeptide [58]
gene [58]


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