Recombinant Microorganisms for Acetovanillone Phosphorylation

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Solution Overview

Problem

There is a need for microbes capable of efficiently catabolizing acetovanillone, a common aromatic monomer derived from lignin depolymerization, to convert it into valuable products, as existing methods yield mixtures of aromatic compounds that are difficult to utilize effectively.

Innovation Solution

Recombinant microorganisms engineered with a recombinant aromatic kinase gene, such as Saro_1862 homologs, are developed to phosphorylate lignin aromatics like acetovanillone, enabling their catabolism and conversion into valuable products.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If chemical methods are used for lignin depolymerization, then aromatic compounds can be obtained, but the products are mixtures that are difficult to utilize effectively

Engineering Contradiction:

Improvearomatic compound productionVSAvoidproduct utilization

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The patent introduces a site-directed mutagenesis approach that changes a specific amino acid residue (glutamate to lysine at position 16 of Saro_1862) to alter the enzymatic activity and substrate specificity, enabling the enzyme to phosphorylate acetovanillone and related compounds that were previously not substrates

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a heterologous kinase enzyme (Saro_1862 from Novosphingobium aromaticivorans) as an intermediary to catalyze the phosphorylation of acetovanillone, converting it into a form that can be effectively utilized by metabolic pathways in the host organism (Escherichia coli)

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If existing microbes are used to catabolize lignin aromatics, then some conversion can occur, but efficiency is insufficient for effective utilization

Engineering Contradiction:

Improvecatabolism efficiencyVSAvoidconversion effectiveness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent performs adaptive laboratory evolution and identifies specific mutations (E16K substitution in Saro_1862) that dramatically improve the enzyme's ability to phosphorylate acetovanillone, thereby enhancing the overall catabolism efficiency of the microbial system

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a feedback approach by expressing the mutant kinase gene in host bacteria and measuring growth on acetovanillone as the sole carbon source, allowing selection and optimization of strains with improved catabolic capability through iterative experimentation

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The recombinant microorganisms effectively catabolize acetovanillone and related lignin aromatics, facilitating their conversion into useful chemicals through phosphorylation, thereby addressing the inefficiencies of existing depolymerization methods.

Implementation Method 1

The aromatic kinase protein can be a homolog of Saro_1862 of Novosphingobium aromaticivorans DSM12444 comprising amino acid sequence comprising a lysine at a position corresponding to position 16 of SEQ ID NO:4

Methodology Applied

Scientific EffectPhosphorylation:

Data Source

PatentUS20260043053A1Recombinant microorganisms that catabolize acetovanillone and methods of using same

Publication Date: 2026.02.12 WISCONSIN ALUMNI RES FOUND

AI summary

Recombinant microorganisms that catabolize lignin aromatics, such as acetovanillone, and methods of using same to catabolize the lignin aromatics.