Abstract:
Methods of constructing a cell comprising in its chromosome one or more copies of an open reading frame (ORF) or operon encoding at least one polypeptide of interest, each copy being under the transcriptional control of a heterologous promoter using a site specific recombinase and in vivo integration by recombination; resulting cells, and methods for producing a polypeptide of interest using the resulting cells.
Abstract:
A bacterial host cell is disclosed including at least two copies of an amplification unit in its genome, the amplification unit including: i) at least one copy of a gene of interest, and ii) an expressible conditionally essential gene, wherein the conditionally essential gene is either promoterless or transcribed from a heterologous promoter having an activity substantially lower than the endogenous promoter of the conditionally essential gene, and wherein the conditionally essential gene if not functional would render the cell auxotrophic for at least one specific substance or unable to utilize one or more specific sole carbon source; methods for producing a protein using the cell of the invention, and methods for constructing the cell of the invention.
Abstract:
A bacterial host cell is disclosed including at least two copies of an amplification unit in its genome, the amplification unit including: i) at least one copy of a gene of interest, and ii) an expressible conditionally essential gene, wherein the conditionally essential gene is either promoterless or transcribed from a heterologous promoter having an activity substantially lower than the endogenous promoter of the conditionally essential gene, and wherein the conditionally essential gene if not functional would render the cell auxotrophic for at least one specific substance or unable to utilize one or more specific sole carbon source; methods for producing a protein using the cell of the invention, and methods for constructing the cell of the invention.
Abstract:
Methods of constructing a cell comprising in its chromosome one or more copies of an open reading frame (ORF) or operon encoding at least one polypeptide of interest, each copy being under the transcriptional control of a heterologous promoter using a site specific recombinase and in vivo integration by recombination; means for carrying out the methods, resulting cells, and methods for producing a polypeptide of interest using the resulting cells.
Abstract:
The present invention relates to temperature-sensitive variants of an RNA-guided endonuclease, polynucleotides encoding said variants, nucleic acid constructs and expression vectors comprising polynucleotides encoding said variants, host cells expressing said variant, methods of transient repression and expression of one or more DNA target sequence using said variants, and use of said variants, polynucleotides, nucleic acid constructs, expression vectors, host cells, and methods.
Abstract:
The present invention relates to means and methods for optimizing expression of a heterologous polypeptide of interest in Gram-positive host cells by co-expression with a foldase that is cognate to the heterologous polypeptide of interest.
Abstract:
The present invention relates to temperature-sensitive variants of a Class-II Cas9 protein, polynucleotides encoding said variants, nucleic acid constructs and expression vectors comprising polynucleotides encoding said variants, host cells expressing said variant, methods of transient repression and expression of one or more genome target sequence using said variants, and use of said variants, polynucleotides, nucleic acid constructs, expression vectors, host cells, and methods.
Abstract:
The present invention relates to methods for improving at least one property of a microorganism host cell by repressing the expression of one or more genome target sequence of interest by CRISPR-inhibition as well as the resulting host cells and methods of production emplying said host cells.
Abstract:
The present invention relates to a method of producing a natively non-secreted polypeptide without a secretion signal in a Bacillus host cell and recovering the polypeptide without performing a lysis step as well as to a Bacillus host cell comprising one or more exogenous or heterologous polynucleotides encoding a natively non-secreted polypeptide with no secretion signal.