Danisco US Inc.

Vtt Technical Research Centre of Finland Ltd

Mari J Valkonen

Michael C Ward

Merja Elisa Penttila

Huaming Wang

Markku Saloheimo

Tiina Pakula

Nina Aro

Markku L A Saloheimo

Felipe Oseas Bendezu

Yun Luo

Certain embodiments of the disclosure are directed to variant filamentous fungal cells, compositions thereof and methods thereof for increased production of one or more proteins of interest. More particularly, in certain embodiments, the disclosure is directed to variant filamentous fungal (host) cells derived from parental filamentous fungal cells, wherein the variant host cells comprise a genetic modification which enables the expression/production of a protein of interest (POI) in the absence of inducing substrate. In certain embodiments, a variant fungal host cell of the disclosure comprises a genetic modification which increases the expression of a variant activator of cellulase expression 3 (ace3) gene encoding an Ace3 protein referred to herein as Ace3-L.

Protein production in filamentous fungal cells in the absence of inducing substrates

Described herein are methods for increasing the amount of protein secreted by a cell. In one case, a cell is provided which contains a heterologous nucleic acid encoding a protein having unfolded protein response modulating activity and a heterologous nucleic acid encoding a protein of interest to be secreted. In one case, the protein having unfolded protein response modulating activity is selected from the proteins selected from the group consisting of HAC1, PTC2 and IRE1. The protein of interest can be any secreted protein such as a therapeutic or an industrial enzyme. For example the protein can be selected from the group consisting of lipase, cellulase, endo-glucosidase H, protease, carbohydrase, reductase, oxidase, isomerase, transferase, kinase, phosphatase, alpha-amylase, glucoamylase, lignocellulose hemicellulase, pectinase and ligninase.

Increased production of secreted proteins by recombinant eukaryotic cells

Growing community of inventors

Helsinki, Finland

Mari J Valkonen