摘要:
Methods and means for the construction of strains of yeast capable of producing cellulolytic enzymes, achieved by the transfer of chromosomal genes or cDNA copies of mRNAs coding for cellulolytic enzymes isolated from the fungus Trichoderma reesei to yeast cells using recombinant DNA vectors capable of replicating in yeast. The correct expression of these cellulolytic genes in yeast leads to the production of cellulolytic enzymes which are secreted from the cell. This allows the yeast to hydrolyze 3-1,4-glucan substrates such as cellulose.
摘要:
The present invention relates to a method for genetically modifying a filamentous fungus host for improved protein production. The method comprises that a filamentous fungus host is genetically modified to overexpress or to be deficient of specific genes. The invention relates also to the modified hosts. Furthermore, the invention relates to a method for improved production or for producing an improved composition of proteins, such as cellulases, hemicellulases, other proteins involved in the degradation of lignocellulosic material, or other proteins, in a filamentous fungus host.
摘要:
The present invention relates to a method for genetically modifying a filamentous fungus host for improved protein production. The method comprises that a filamentous fungus host is genetically modified to overexpress or to be deficient of specific genes. The invention relates also to the modified hosts. Furthermore, the invention relates to a method for improved production or for producing an improved composition of proteins, such as cellulases, hemicellulases, other proteins involved in the degradation of lignocellulosic material, or other proteins, in a filamentous fungus host.
摘要:
Host cells, comprising Kluveryomyces expressing heterologous cellulases produce ethanol from cellulose In addition, multiple host cells expressing different heterlogous cellulases can be co-cultured together and used to produce ethanol from cellulose The recombinant yeast strains and co-cultures of the yeast strains can be used to produce ethanol on their own, or can also be used in combination with externally added cellulases to increase the efficiency of sacchanfication and fermentation processes.
摘要:
The present invention relates to a method and microbial host strain for converting a hexuronic acid to a hexaric acid. In particular, the invention relates to the conversion of D-galacturonic acid to meso-galactaric acid (mucic acid). The invention also concerns an isolated nucleotide sequence. According to the present method a microbial host strain genetically modified to express uronate dehydrogenase enzyme (EC 1.1.1.203) is contacted with a biomaterial comprising hexuronic acid and the conversion products are recovered. By using the recombinant microorganisms of the present invention it is possible to treat biomaterials comprising hexuronic acids and thereby decrease the amount of hexuronic acids released to the environment.
摘要:
The present invention relates to a method for genetically modifying a filamentous fungus host for improved protein production. The method comprises that a filamentous fungus host is genetically modified to overexpress or to be deficient of specific genes. The invention relates also to the modified hosts. Furthermore, the invention relates to a method for improved production or for producing an improved composition of proteins, such as cellulases, hemicellulases, other proteins involved in the degradation of lignocellulosic material, or other proteins, in a filamentous fungus host.
摘要:
A DNA molecule comprising a fungal gene encoding an enzyme protein capable of converting L-galactonic acid into L-threo-3-deoxy-hexulosonic acid has been cloned and heterologously expressed. The enzyme is involved in the metabolic conversion of sugar acids, which are present in biological waste material such as sugar beet pulp and other pectin comprising material. A microorganism genetically modified to effectively express said enzyme may be used in fermenting biomaterial to desired end products such as ethanol. Alternatively, microorganisms in which the gene has been inactivated may be used to produce L-galactonic acid, which accumulates when the expression of the gene is prevented.
摘要:
The present invention relates to a method for genetically modifying a filamentous fungus host for improved protein production. The method comprises that a filamentous fungus host is genetically modified to be deficient or to overexpress specific genes. The invention relates also to the modified hosts. Furthermore, the invention relates to a method for improved production or for producing an improved composition of proteins, such as cellulases, hemicellulases, other proteins involved in the degradation of lignocellulosic material, or other proteins, in a filamentous fungus host.
摘要:
Host cells, comprising Kluveryomyces expressing heterologous cellulases produce ethanol from cellulose In addition, multiple host cells expressing different heterlogous cellulases can be co-cultured together and used to produce ethanol from cellulose The recombinant yeast strains and co-cultures of the yeast strains can be used to produce ethanol on their own, or can also be used in combination with externally added cellulases to increase the efficiency of sacchanfication and fermentation processes
摘要:
The present invention relates to isolation and purification of protein in aqueous two-phase systems (ATPS). Specifically, the invention provides processes for partitioning of proteins of interest in ATPS by fusing said proteins to targeting proteins which have the ability of carrying said protein into one of the phases.