摘要:
The present invention relates to novel host cells and to methods of producing proteins. More specifically the invention relates to a host cell useful for the expression of heterologous proteins, which host cell has been genetically modified in order to express significantly reduced levels of a metalloprotease. Moreover the invention relates to a method of producing a heterologous protein, which method comprises cultivating the host cell in a suitable growth medium, followed by recovery of the desired protein.
摘要:
The present invention relates to a filamentous fungal cell in which an endogenous alkaline protease activity, an endogenous neutral metalloprotease activity and an endogenous serine protease activity of the subtilisin type have been completely or partially inactivated. Particularly the endogenous alkaline protease activity, the endogenous neutral metalloprotease activity and the endogenous serine protease activity of the subtilisin type are encoded by the alp, npI and pepC genes respectively. The filamentous fungal cell is particularly suitable for production of heterologous proteins such as antibodies.
摘要:
The present invention relates to methods for producing a polypeptide of interest by (a) cultivating a mutant of a parent Aspergillus cell, wherein (i) the mutant comprises a first nucleic acid sequence encoding the polypeptide and a second nucleic acid sequence comprising a modification of at least one of the genes responsible for the biosynthesis or secretion of at least one toxin, and (ii) the mutant produces less of the toxin than the parent Aspergillus cell when cultured under the same conditions; and (b) isolating the polypeptide from the culture medium. Also, mutants of Aspergillus cells are provided, as well as methods for obtaining the mutant cells.
摘要:
The present invention relates to novel host cells and to methods of producing proteins. More specifically the invention relates to a host cell useful for the expression of heterologous proteins, in which the host cell has been genetically modified in order to express significantly reduced levels of a metalloprotease and an alkaline protease. Moreover the invention relates to a method of producing a heterologous protein, which method comprises cultivating the host cell in a suitable growth medium, followed by recovery of the desired protein.
摘要:
The present invention relates to an isolated polypeptide having PepC inhibitory activity as well as to a method for producing a heterologous polypeptide of interest in an Aspergillus host cell comprising: (a) cultivating the Aspergillus host cell comprising a first and a second nucleic acid sequences under conditions conducive for the expression of the polypeptides encoded by the said first and second nucleic acid sequences, and wherein the first nucleic acid sequence encodes a heterologous polypeptide of interest and the second nucleic acid encodes the inhibitor polypeptide of the invention, and wherein the inhibitor polypeptide is expressed from a recombinant nucleic acid construct resulting in an increased level of the inhibitor polypeptide compared to an Aspergillus host cell not comprising the recombinant nucleic acid construct; and (b) recovering the heterologous polypeptide.
摘要:
The present invention relates to a method for increasing the production yield of a secreted antibody or antibody fragment in a filamentous fungal host cell, comprising: recombinant expression of the antibody or antibody fragment and over-expressing a BiP chaperone protein.
摘要:
The present invention relates to methods for producing a polypeptide of interest by (a) cultivating a mutant of a parent Aspergillus cell, wherein (i) the mutant comprises a first nucleic acid sequence encoding the polypeptide and a second nucleic acid sequence comprising a modification of at least one of the genes responsible for the biosynthesis or secretion of at least one toxin, and (ii) the mutant produces less of the toxin than the parent Aspergillus cell when cultured under the same conditions; and (b) isolating the polypeptide from the culture medium. Also, mutants of Aspergillus cells are provided, as well as methods for obtaining the mutant cells.