|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 18.104.22.168
Enzymes and Genes:
|Sphingobium fuliginis :||organophosphate acid anhydrase
In Pathway: paraoxon degradation
Note that this reaction equation differs from the official Enzyme Commission reaction equation for this EC number, which can be found here .
The reaction direction shown, that is, A + B ↔ C + D versus C + D ↔ A + B, is in accordance with the direction in which it was curated.
Most BioCyc compounds have been protonated to a reference pH value of 7.3, and some reactions have been computationally balanced for hydrogen by adding free protons. Please see the PGDB Concepts Guide for more information.
Mass balance status: Balanced.
Enzyme Commission Primary Name: aryldialkylphosphatase
Enzyme Commission Synonyms: organophosphate hydrolase, paraoxonase, A-esterase, aryltriphosphatase, organophosphate esterase, esterase B1, esterase E4, paraoxon esterase, pirimiphos-methyloxon esterase, OPA anhydrase, organophosphorus hydrolase, phosphotriesterase, paraoxon hydrolase, OPH, organophosphorus acid anhydrase
Standard Gibbs Free Energy (ΔrG'° in kcal/mol): 3.5787811 [Latendresse13]
Enzyme Commission Summary:
Acts on organophosphorus compounds (such as paraoxon) including esters of phosphonic and phosphinic acids. Inhibited by chelating agents; requires divalent cations for activity. Previously regarded as identical with EC 22.214.171.124 arylesterase.
Unification Links: KEGG:R05548
ALDRIDGE53: ALDRIDGE WN (1953). "Serum esterases. I. Two types of esterase (A and B) hydrolysing p-nitrophenyl acetate, propionate and butyrate, and a method for their determination." Biochem J 53(1);110-7. PMID: 13032041
Bosmann72: Bosmann HB (1972). "Membrane marker enzymes. Characterization of an arylesterase of guinea pig cerebral cortex utilizing p-nitrophenyl acetate as substrate." Biochim Biophys Acta 276(1);180-91. PMID: 5047702
Mackness87: Mackness MI, Thompson HM, Hardy AR, Walker CH (1987). "Distinction between 'A'-esterases and arylesterases. Implications for esterase classification." Biochem J 245(1);293-6. PMID: 2822017
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