:Monoterpene epsilon-lactone hydrolase

{{Infobox enzyme

| Name = Monoterpene ε-lactone hydrolase

| EC_number = 3.1.1.83

| CAS_number =

| GO_code =

| image =

| width =

| caption =

}}

The enzyme monoterpene ε-lactone hydrolase (EC 3.1.1.83, MLH; systematic name isoprop(en)ylmethyloxepan-2-one lactonohydrolase{{cite journal | vauthors = van der Vlugt-Bergmans CJ, van der Werf MJ | title = Genetic and biochemical characterization of a novel monoterpene ε-lactone hydrolase from Rhodococcus erythropolis DCL14 | journal = Applied and Environmental Microbiology | volume = 67 | issue = 2 | pages = 733–41 | date = February 2001 | pmid = 11157238 | pmc = 92642 | doi = 10.1128/aem.67.2.733-741.2001 }} catalyses the reaction

: (1) isoprop(en)ylmethyloxepan-2-one + H₂O $\backslash rightleftharpoons$ 6-hydroxyisoprop(en)ylmethylhexanoate (general reaction)

: (2) 4-isopropenyl-7-methyloxepan-2-one + H₂O $\backslash rightleftharpoons$ 6-hydroxy-3-isopropenylheptanoate

: (3) 7-isopropyl-4-methyloxepan-2-one + H₂O $\backslash rightleftharpoons$ 6-hydroxy-3,7-dimethyloctanoate

The enzyme catalyses the ring opening of ε-lactones in Gram-positive bacterium Rhodococcus erythropolis DCL14.