Abstract:
The present invention relates to a genetically modified yeast cell comprising: - at least one recombinant promoter operably linked to at least one gene encoding a polypeptide or protein supporting the biosynthesis of polypeptides or proteins within said cell, said at least one gene being located at the native genomic locus of the genetically unmodified wild-type yeast cell, wherein the naturally occurring promoter of the at least one gene encoding the biosynthesis supporting polypeptide or protein is inactivated by at least one mutation within said naturally occurring promoter and, - a secretion cassette comprising a recombinant nucleic acid molecule encoding a protein or polypeptide of interest and a method for producing a recombinant protein or polypeptide of interest using such a cell.
Abstract:
R-Hydroxynitrillyasen aus der Familie Rosaceae mit einer verbesserten Substratak zeptanz und erhöhter Stabilität, bei weichen im aktiven Zentrum der R Hydroxynitrillyasen entweder a) ein Alaninrest durch Glycin, Valin, Leucin, Isoleucin oder Phenylalanin oder b) ein Phenylalaninrest durch Alanin, Glycin Valin, Leucin oder Isoleucin oder c) ein Leucinrest durch Alanin, Glycin, Valin, Isoleucin oder Phenylalanin oder d) ein Isoleucinrest durch Alanin, Glycin, Valin, Leucin oder Phenylalanin substituiert ist und deren Verwendung zur Herstellung von enantiomerenreinen R- oder S-Cyanhydrinen.
Abstract:
R-hydroxynitrile lyases having an improved substrate acceptance, increased activity and increased selectivity, in which there is replacement in the amino acid sequence of R-hydroxynitrile lyases from the Rosaceae family either a) of the amino acid residue which corresponds to position 360 of the mature PaHNL5 protein by another apolar amino acid or a neutral amino acid and/or b) of the amino acid residue which corresponds to position 225 of the mature PaHNL5 protein by another polar amino acid, it also being possible where appropriate for 1 to 20 further residues in the active center or in the hydrophobic channel leading to the active center to be replaced.