Conversion of methionine to methional by Lactococcus lactis.
Lactic acid bacteria were screened for methional production from 4-methylthio-2-ketobutanoate. Only Lactococcus lactis IFPL730 produced high amounts of methional. It was demonstrated that production of this compound was an exclusively enzymatic reaction. The present work describes for the first time that L. lactis can convert enzymatically methionine to methional in a process mediated by aminotransferase and alpha-ketoacid decarboxylase activities. The activity seems to be strain dependent.
Amárita
F
F
Department of Science and Technology of Dairy Products, Instituto del Frío (CSIC), Ciudad Universitaria, E-28040 Madrid, Spain.
Fernández-Esplá
D
D
Requena
T
T
Pelaez
C
C
D000447:Aldehydes / Q000378:metabolism*; D002087:Butyrates / Q000378:metabolism; D003470:Culture Media; D013294:Lactococcus lactis / Q000254:growth & development / Q000378:metabolism*; D008715:Methionine / Q000378:metabolism*; D011767:Pyruvate Decarboxylase / Q000378:metabolism; D013438:Sulfhydryl Compounds; D000637:Transaminases / Q000378:metabolism
D000447:Aldehydes; D002087:Butyrates; D003470:Culture Media; D013438:Sulfhydryl Compounds; C008390:methional; C045636:2-keto-4-mercaptobutyric acid; D008715:Methionine; D000637:Transaminases; D011767:Pyruvate Decarboxylase