Chemical compound
5-Hydroxyferulic acid is a hydroxycinnamic acid.
It is a precursor in the biosynthesis of sinapic acid. Phenylalanine is first converted to cinnamic acid by the action of the enzyme phenylalanine ammonia-lyase (PAL). A series of enzymatic hydroxylations and methylations leads to coumaric acid, caffeic acid, ferulic acid, 5-hydroxyferulic acid and sinapic acid.
Thus 5-hydroxyferulic acid is formed from ferulic acid by the action of the specific enzyme ferulate 5-hydroxylase (F5H).
References
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| Aglycones | | Precursor | |
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Monohydroxycinnamic acids
(Coumaric acids) | |
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| Dihydroxycinnamic acids | |
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| Trihydroxycinnamic acids | |
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| O-methylated forms | |
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| others | |
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| Esters | | glycoside-likes | Esters of
caffeic acid
with cyclitols | |
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| Glycosides | |
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| Tartaric acid esters | |
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Other esters
with caffeic acid | |
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Caffeoyl phenylethanoid
glycoside (CPG) |
- Echinacoside
- Calceolarioside A, B, C, F
- Chiritoside A, B, C
- Cistanoside A, B, C, D, E, F, G, H
- Conandroside
- Myconoside
- Pauoifloside
- Plantainoside A
- Plantamajoside
- Tubuloside B
- Verbascoside (Isoverbascoside, 2′-Acetylverbascoside)
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| Oligomeric forms | | Dimers |
- Diferulic acids (DiFA) : 5,5′-Diferulic acid, 8-O-4′-Diferulic acid, 8,5′-Diferulic acid, 8,5′-DiFA (DC), 8,5′-DiFA (BF), 8,8′-Diferulic acid
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| Trimers | |
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| Tetramers | |
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Conjugates with
coenzyme A (CoA) | |
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