Evonik Degussa Gmbh

Evonik Operations Gmbh

Stella Molck

Brigitte Bathe

Frank Schneider

Guido Meurer

Stefan Pelzer

Horst Priefert

Daniel Petri

Claudia Borgmeier

Sandra Herbold

Rose Whelan

Jessica Kleinbölting

Kiran Doranalli

Maike Kipker

The current invention concerns a newstrain with strong inhibition ofand its use as a probiotic.

strain with probiotic activity

The present invention relates to a process for the fermentative production of L-amino acids using microorganisms of the Enterobacteriaceae family, which harbor an attenuated proP gene, to the microorganisms suitable for said production and to polynucleotides coding for variants of the ProP transporter.

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The invention relates to a process for the fermentative preparation of sulphur-containing amino acids chosen from the group of L-methionine, L-cysteine, L-cystine, L-homocysteine and L-homocystine, comprising the steps:

Process for the fermentative preparation of sulphur-containing amino acids

Disclosed herein is a process for the fermentative preparation of sulphur-containing amino acids chosen from the group of L-methionine, L-cysteine, L-cystine, L-homocysteine and L-homocystine, comprising the steps: a) provision of a microorganism of the family Enterobacteriaceae or of a microorganism of the family Corynebacteriaceae which has an increased thiosulphate sulphurtransferase activity compared with the particular starting strain; b) fermentation of the microorganism from a) in a medium which contains an inorganic source of sulphur chosen from the group of salt of dithiosulphuric acid or a mixture of a salt of dithiosulphuric acid and a salt of sulphuric acid, a fermentation broth being obtained, and c) concentration of the sulphur-containing amino acid in the fermentation broth from b).

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Bielefeld, Germany

Stella Molck