4-Hydroxybenzaldehyde
4-Hydroxybenzaldehyde, also known as 4-formylphenol or 4-hydroxybenzenecarbonal, belongs to the class of organic compounds known as hydroxybenzaldehydes. These are organic aromatic compounds containing a benzene ring carrying an aldehyde group and a hydroxyl group. A hydroxybenzaldehyde that is benzaldehyde substituted with a hydroxy group at position C-4. 4-Hydroxybenzaldehyde exists in all living organisms, ranging from bacteria to humans. 4-Hydroxybenzaldehyde is a sweet, almond, and balsam tasting compound. 4-Hydroxybenzaldehyde is found, on average, in the highest concentration within vinegars and oats. 4-Hydroxybenzaldehyde has also been detected, but not quantified, in several different foods, such as cardoons, colorado pinyons, oyster mushrooms, common chokecherries, and potato. This could make 4-hydroxybenzaldehyde a potential biomarker for the consumption of these foods.
| ID | EC Number | Name |
|---|---|---|
| KEGG:R01293 | 1.2.1.28 | 4-hydroxybenzaldehyde:NAD+ oxidoreductase |
| KEGG:R01294 | 1.2.1.7 | 4-hydroxybenzaldehyde:NADP+ oxidoreductase |
| KEGG:R01303 | 1.14.99.- | C00156 + C00028 + C00001<=>C00633 + C00030 + C00007 |
| KEGG:R02672 | 4.1.1.7 | 4-hydroxybenzoylformate carboxy-lyase |
| KEGG:R02673 | 1.1.3.19 | (S)-2-hydroxy-2-(4-hydroxyphenyl)acetate:oxygen 1-oxidoreductase |
| KEGG:R02675 | 1.17.9.1 | 4-methylphenol:oxidized azurin oxidoreductase (methyl-hydroxylating) |
| KEGG:R02676 | 4.1.2.11 | 4-hydroxymandelonitrile hydroxybenzaldehyde-lyase |
| KEGG:R06886 | 1.3.-.- | C13632 + C00007<=>C00633 + C10700 |
| KEGG:R12134 | 1.17.9.1 | C17467 + 2 C05357<=>C00633 + 2 C05358 + 2 C00080 |
| KEGG:R13288 | 4.1.2.66 | C22890<=>C00633 + C00033 |
| KEGG:R13289 | 4.1.2.66 | 4-coumarate acetate-lyase (4-hydroxybenzaldehyde-forming) |
| KEGG:R13380 | 1.13.11.94 | 4-vinylphenol:oxygen oxidoreductase |
| Rhea:RHEA:15142 | 1.17.9.1 | 4-methylphenol + 4 oxidized [azurin] + H2O => 4 reduced [azurin] + 4-hydroxybenzaldehyde + 4 H+ |
| Rhea:RHEA:15143 | 1.17.9.1 | 4 reduced [azurin] + 4-hydroxybenzaldehyde + 4 H+ => 4-methylphenol + 4 oxidized [azurin] + H2O |
| Rhea:RHEA:15144 | 1.17.9.1 | 4-methylphenol + 4 oxidized [azurin] + H2O <=> 4 reduced [azurin] + 4-hydroxybenzaldehyde + 4 H+ |
| Rhea:RHEA:15834 | 1.1.3.19 | (S)-4-hydroxymandelate + O2 + H+ => 4-hydroxybenzaldehyde + H2O2 + CO2 |
| Rhea:RHEA:15835 | 1.1.3.19 | 4-hydroxybenzaldehyde + H2O2 + CO2 => (S)-4-hydroxymandelate + O2 + H+ |
| Rhea:RHEA:15836 | 1.1.3.19 | (S)-4-hydroxymandelate + O2 + H+ <=> 4-hydroxybenzaldehyde + H2O2 + CO2 |
| Rhea:RHEA:15978 | 4.1.2.11 | (S)-4-hydroxymandelonitrile => 4-hydroxybenzaldehyde + hydrogen cyanide |
| Rhea:RHEA:15979 | 4.1.2.11 | 4-hydroxybenzaldehyde + hydrogen cyanide => (S)-4-hydroxymandelonitrile |
| Rhea:RHEA:15980 | 4.1.2.11 | (S)-4-hydroxymandelonitrile <=> 4-hydroxybenzaldehyde + hydrogen cyanide |
| Rhea:RHEA:20306 | 1.2.1.64 | 4-hydroxybenzaldehyde + NAD+ + H2O => 4-hydroxybenzoate + NADH + 2 H+ |
| Rhea:RHEA:20307 | 1.2.1.64 | 4-hydroxybenzoate + NADH + 2 H+ => 4-hydroxybenzaldehyde + NAD+ + H2O |
| Rhea:RHEA:20308 | 1.2.1.64 | 4-hydroxybenzaldehyde + NAD+ + H2O <=> 4-hydroxybenzoate + NADH + 2 H+ |
| Rhea:RHEA:40996 | 3-hydroxy-3-(4-hydroxyphenyl)propanoyl-CoA => 4-hydroxybenzaldehyde + acetyl-CoA | |
| Rhea:RHEA:40997 | 4-hydroxybenzaldehyde + acetyl-CoA => 3-hydroxy-3-(4-hydroxyphenyl)propanoyl-CoA | |
| Rhea:RHEA:40998 | 3-hydroxy-3-(4-hydroxyphenyl)propanoyl-CoA <=> 4-hydroxybenzaldehyde + acetyl-CoA | |
| Rhea:RHEA:47937 | 1.2.1.96 | 4-hydroxybenzaldehyde + NADP+ + H2O => 4-hydroxybenzoate + NADPH + 2 H+ |
| Rhea:RHEA:47938 | 1.2.1.96 | 4-hydroxybenzoate + NADPH + 2 H+ => 4-hydroxybenzaldehyde + NADP+ + H2O |
| Rhea:RHEA:47939 | 1.2.1.96 | 4-hydroxybenzaldehyde + NADP+ + H2O <=> 4-hydroxybenzoate + NADPH + 2 H+ |