Urolithin Production via Microbial Hydroxyl Elimination

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Solution Overview

Problem

Current methods for producing urolithins, particularly urolithin A and urolithin C, face challenges in efficiently converting ellagic acid into these metabolites, with limited production yields and inability to eliminate the hydroxyl group at the 8-position, restricting the production of other urolithin variants like urolithin B.

Innovation Solution

A method involving microorganisms from the genus Slackia, such as Slackia heliotrinireducens, and Gordonibacter, like Gordonibacter pamelaeae, is used to convert urolithin C into isourolithin A and urolithin A into urolithin B by eliminating the hydroxyl group at the 8-position, utilizing fermentation processes in specific media conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If chemical synthesis method is used to produce urolithins, then production yield is improved, but suitability for functional food applications deteriorates

Engineering Contradiction:

Improveproduction yieldVSAvoidsuitability for functional food applications

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent replaces chemical synthesis methods with biological fermentation methods using microorganisms. Specifically, it employs bacteria such as Lactobacillus, Bifidobacterium, and E. coli equipped with heterologous gene clusters to biosynthetically produce urolithins from ellagic acid precursors, thereby achieving production suitable for functional food applications while maintaining viable yields

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces microbial intermediaries (bacteria with engineered metabolic pathways) to convert ellagic acid into urolithins through controlled fermentation. These microbial systems serve as living factories that produce urolithins in a manner compatible with food and beverage applications, bridging the gap between production efficiency and application suitability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If existing microorganism fermentation method is used to produce urolithin C, then production is achieved, but production yield remains low and urolithin A cannot be produced

Engineering Contradiction:

Improveproduction capabilityVSAvoidproduction yield

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent modifies microbial parameters by introducing and expressing heterologous gene clusters (such as the urolithin gene cluster from Gordonibacter pamelaeae) into host microorganisms. This genetic parameter change enables the microorganisms to acquire new metabolic capabilities for producing both urolithin A and urolithin C with improved yields

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates multi-functional microorganisms that can produce multiple urolithin types (both urolithin A and urolithin C) from the same ellagic acid precursor. The engineered bacterial strains possess versatile metabolic pathways that enable simultaneous or sequential production of different urolithin variants, overcoming the limitation of single-product fermentation

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If Gordonibacter pamelaeae is used to produce urolithin C from ellagic acid, then production is achieved, but ability to eliminate hydroxyl group at 8-position is lost

Engineering Contradiction:

Improveproduction yieldVSAvoidability to produce different urolithin variants

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent segments the urolithin biosynthesis pathway into modular gene clusters that can be independently manipulated and recombined. By separating and reassembling these genetic modules in different host microorganisms, the patent restores the ability to produce various urolithin variants including those requiring hydroxyl group elimination at the 8-position

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses intermediary microorganisms (such as Lactobacillus and Bifidobacterium species) that can perform the hydroxyl group elimination function. These intermediary strains, when equipped with appropriate gene clusters, serve as biological catalysts that restore the missing metabolic capability to eliminate the 8-position hydroxyl group and produce diverse urolithin variants

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This method enables the production of urolithin B and other urolithin variants with enhanced yields, potentially utilizing them in cosmetics, pharmaceuticals, and food products for antioxidant, anti-inflammatory, and anti-glycation actions.

Implementation Method 1

Methodology Applied

Scientific EffectFermentation: Fermentation

Data Source

PatentUS11667937B2Method for producing urolithins

Publication Date: 2023.06.06 DAICEL CORP

AI summary

An object of the present invention is to provide a method for eliminating the hydroxyl group at the 8-position of a urolithin to produce another kind of urolithin, and this object is achieved by a method for producing a second urolithin, comprising allowing, in a solution containing a first urolithin, a microorganism having an ability to produce the second urolithin from the first urolithin.