Regulatable growth of filamentous fungi
The present invention generally relates to hyphal growth in fungi and in particular describes the modulation of genes associated with hyphal growth in filamentous fungi. The present invention provides methods and systems for the production of proteins and/or chemicals from filamentous fungi which comprise modulation of genes associated with hyphal growth. Specifically, the present invention is directed to a full length cotA gene, its gene product and methods of use.
1. An isolated polynucleotide that encodes or is fully complementary to a sequence that encodes a cotA polypeptide having serine/threonine kinase activity selected from the group consisting of:
a nucleic acid sequence that encodes or is fully complementary to a sequence that encodes a cotA polypeptide having at least 95% sequence identity to the amino acid sequence presented as SEQ ID NO:2 ( FIG. 2 ),
a nucleic acid sequence that encodes or is fully complementary to a sequence that encodes a cotA polypeptide having the amino acid sequence presented as SEQ ID NO:2 ( FIG. 2 ), and
the nucleic acid sequence presented as SEQ ID NO:1 ( FIG. 1 ) or the full complement thereof.
2. An expression cassette comprising a promoter operatively linked to a polynucleotide of claim 1 .
3. The expression cassette of claim 2 , wherein the promoter is inducible.
4. The expression cassette of claim 3 , wherein the promoter is selected from the group consisting of glucoamylase gene promoter, blue light inducible promoters (bli-4), and copper metallothionein gene (cmt) promoter.
5. The expression cassette of claim 4 , wherein the promoter is the glucoamylase A (glaA) promoter.
6. An expression vector comprising the expression cassette of claim 2 .