Production of heterologous proteins in filamentous fungi
First Claim
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1. A recombinant DNA construct in which protein-encoding DNA is linked operably with a promoter variant of an Aspergillus promoter, wherein said Aspergillus promoter comprises a creA binding site, which is at least six contiguous guanine or cytosine nucleotides and mediates carbon-catabolite repression of said promoter, and other regulatory sequences;
- and wherein said promoter variant lacks the creA binding site, comprises the other regulatory sequences, and mediates expression of said protein-encoding DNA in the presence of glucose.
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Abstract
Expression of proteins in filamentous fungal hosts is achieved in the presence of glucose using promoter variants in which creA binding sites are functionally disrupted.
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Citations
10 Claims
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1. A recombinant DNA construct in which protein-encoding DNA is linked operably with a promoter variant of an Aspergillus promoter, wherein said Aspergillus promoter comprises a creA binding site, which is at least six contiguous guanine or cytosine nucleotides and mediates carbon-catabolite repression of said promoter, and other regulatory sequences;
- and wherein said promoter variant lacks the creA binding site, comprises the other regulatory sequences, and mediates expression of said protein-encoding DNA in the presence of glucose.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An Aspergillus nidulans strain that expresses the alcR gene product in the presence of glucose and has incorporated therein a recombinant DNA construct in which protein-encoding DNA is linked operably with a promoter variant of the alcA promoter, wherein said alcA promoter comprises creA binding sites at positions -302 and -167 each with at least six contiguous guanosine or cytosine nucleotides and mediates carbon-catabolite repression of said promoter, and other regulatory sequences;
- and wherein said promoter variant lacks the creA binding sites, comprises the other regulatory sequences, and mediates expression of said protein encoding DNA in the presence of glucose, whereby the protein-encoding DNA is expressed when said strain is cultured in the presence of glucose and inducer.
- View Dependent Claims (10)
Specification