4-Hydroxybenzoic acid, also known as p-hydroxybenzoic acid (PHBA), is a monohydroxybenzoic acid, a phenolic derivative of benzoic acid. It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as alcohols and acetone. 4-Hydroxybenzoic acid is primarily known as the basis for the preparation of its esters, known as parabens, which are used as preservatives in cosmetics and some ophthalmic solutions. It is isomeric with 2-hydroxybenzoic acid, known as salicylic acid, a precursor to aspirin, and with 3-hydroxybenzoic acid.
Amidohydrolases are a type of hydrolase that acts upon amide bonds.
The crotonase family comprises mechanistically diverse proteins that share a conserved trimeric quaternary structure, the core of which consists of 4 turns of a (beta/beta/alpha)n superhelix.
In enzymology, a 4-hydroxybenzoyl-CoA reductase (EC 1.3.7.9) is an enzyme found in some bacteria and archaea that catalyzes the chemical reaction
In enzymology, a 4-methoxybenzoate monooxygenase (O-demethylating) (EC 1.14.99.15) is an enzyme that catalyzes the chemical reaction
In enzymology, a 2,4'-dihydroxyacetophenone dioxygenase (EC 1.13.11.41) is an enzyme that catalyzes the chemical reaction
In enzymology, a phosphoenolpyruvate mutase is an enzyme that catalyzes the chemical reaction
In enzymology, a 4-chlorobenzoate dehalogenase (EC 3.8.1.6) is an enzyme that catalyzes the chemical reaction
In enzymology, a 4-chlorobenzoyl-CoA dehalogenase (EC 3.8.1.7) is an enzyme that catalyzes the chemical reaction
In enzymology, a phosphonoacetaldehyde hydrolase (EC 3.11.1.1) is an enzyme that catalyzes the chemical reaction
In enzymology, a phosphonopyruvate hydrolase (EC 3.11.1.3) is an enzyme that catalyzes the chemical reaction
In enzymology, a (S)-2-haloacid dehalogenase (EC 3.8.1.2) is an enzyme that catalyzes the chemical reaction
The enzyme 4-hydroxybenzoate decarboxylase (EC 4.1.1.61) catalyzes the chemical reaction
In enzymology, a 4-chlorobenzoate—CoA ligase is an enzyme that catalyzes the chemical reaction
In enzymology, a 4-hydroxybenzoate—CoA ligase is an enzyme that catalyzes the chemical reaction
4-hydroxybenzoate geranyltransferase is an enzyme with systematic name geranyl-diphosphate:4-hydroxybenzoate 3-geranyltransferase. This enzyme catalyses the following chemical reaction
3-Hydroxybenzoate—CoA ligase is an enzyme with systematic name 3-hydroxybenzoate:CoA ligase (AMP-forming). This enzyme catalyses the following chemical reaction
Acyl-CoA thioesterase 13 is a protein that in humans is encoded by the ACOT13 gene. This gene encodes a member of the thioesterase superfamily. In humans, the protein co-localizes with microtubules and is essential for sustained cell proliferation.
3-Hydroxybenzoyl-CoA is a molecule formed by condensing the thiol group of coenzyme A (CoA) with the carboxylic acid group of 3-hydroxybenzoic acid. Stable in acidic conditions, it is a tetraprotic acid due to the pyrophosphate and phosphate groups included. It derives from a benzoyl-CoA and a 3-hydroxybenzoic acid. In organisms such as plants, this can be formed using the 3-hydroxybenzoate—CoA ligase enzyme. This uses ATP, 3-hydroxybenzoate, and CoA as substrates.
