Ace3-Modified Trichoderma Strains for Inducer-Free Enzyme Production

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Solution Overview

Problem

The commercial-scale production of cellulase enzymes by Trichoderma sp. fungal cells is costly due to the need for inducing substrates like sophorose or lactose, as existing methods face high costs and inefficiencies in providing these substrates.

Innovation Solution

Development of genetically modified Trichoderma sp. cells with variant Ace3 transcription factor proteins that upregulate lignocellulosic degrading enzyme expression in the absence of inducing substrates, utilizing modified Ace3 TF proteins with specific C-terminal truncations or mutations to enhance enzyme production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If inducing substrates like sophorose or lactose are provided to Trichoderma sp. cells, then enzyme production is up-regulated, but production costs increase significantly

Engineering Contradiction:

Improveenzyme productionVSAvoidcost of inducing substrate

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The invention modifies the Ace3 transcription factor protein by changing its amino acid sequence (specifically N-terminal truncations or mutations), which alters its regulatory parameters to enable constitutive expression of cellulase genes without requiring inducing substrates like sophorose or lactose

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention extracts or removes the dependency on external inducing substrates by modifying the Ace3 transcription factor to be active without these substrates, thereby eliminating the need to provide costly inducing agents in the culture medium

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If variant Ace3 transcription factor proteins are engineered, then enzyme expression increases without inducing substrates, but genetic modification complexity increases

Engineering Contradiction:

Improveenzyme expressionVSAvoidgenetic modification

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The Ace3 transcription factor protein is segmented by removing specific N-terminal portions (truncations) or modifying specific regions, creating simplified variants that retain functionality while gaining constitutive expression capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using external inducing substrates to activate Ace3, the invention inverts the approach by genetically modifying Ace3 itself to be permanently active, reversing the cause-effect relationship between substrate presence and enzyme expression

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12606838B2Compositions and methods for enhanced protein production in filamentous fungal cells

Publication Date: 2026.04.21 DANISCO US INC

AI summary

The present disclosure is generally related to mutant and genetically modified filamentous fungal cells and methods thereof for use in the production of proteins of interest. More particularly, as described herein, the mutant and/or modified fungal cells (strains) of the disclosure are well-suited for use in industrial scale fermentation processes for the enhanced expression/production of proteins of interest in the absence and/or in the presence of an inducing substrate.