The present invention relates to the field of bio-production of ectoine. There is a need in the art for ectoine production methods allowing its highly efficient synthesis and secretion. The solution proposed in the present invention is the use of a genetically modified yeast comprising many modifications as described in the present text.

A method of the bio-production of methionine and/or of its derivatives thereof from a reduced source of sulfur, such as MeSH or MeSNa including genetically modified yeasts, having an increased ability to produce methionine and/or its derivatives thereof, as compared to the parent yeasts.

The present disclosure relates to a variant of YjeH, which is an inner membrane protein, a microorganism including the same, and a method for producing a target product using the same.

The present invention relates to a compound of general formula I ##STR00001## The present invention also relates to a method of producing N-acetyl homoserine and/or derivatives thereof, the method comprising contacting at least one recombinant cell in an aqueous medium with acetate wherein the recombinant cell comprises an increased activity relative to a wild type cell of (a) an enzyme E.sub.1, a homoserine dehydrogenase (EC1.1.1.3) and/or an enzyme E.sub.5, an aspartokinase (EC2.7.2.4); and (b) an enzyme E.sub.2, a homoserine O-acetyl transferase (EC2.3.1.31)
and the acetate is maintained at a concentration of at least about 0.001 g/L in the aqueous medium.

The present invention relates to the field of bio-production of ectoine. There is a need in the art for ectoine production methods allowing its highly efficient synthesis and secretion. The solution proposed in the present invention is the use of a genetically modified yeast comprising many modifications as described in the present text.

Metal bioremediation and metal mining strategies can include compositions and methods.

The present invention relates to a method for producing L-methionine in which a microorganism is cultured in the presence of L-homoserine and methyl mercaptan, a salt of the same or dimethyl disulfide whereby the L-methionine is accumulated in the culture medium.

The present disclosure relates to an O-succinyl homoserine transferase mutant, a polynucleotide encoding the same, a microorganism including the mutant, and a method of producing O-succinyl homoserine using the microorganism.

Disclosed is a microorganism of Escherichia sp. producing O-acetyl homoserine, and a method of producing O-acetyl homoserine in high yield using the microorganism.

The present disclosure relates to an O-succinyl homoserine transferase mutant, a polynucleotide encoding the same, a microorganism including the mutant, and a method of producing O-succinyl homoserine using the microorganism.