Recombinant Hosts for Macrocyclic Ketone Biosynthesis

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Solution Overview

Problem

Current methods for producing muscone and civetone are labor-intensive and inefficient, particularly due to the need for high yields of these macrocyclic ketones and their precursors, which are essential in the fragrance industry, and the ethical concerns related to sourcing musk deer-derived muscone.

Innovation Solution

A recombinant host cell is engineered to produce muscone and civetone precursors and ketones through a series of genetic modifications, including genes encoding polypeptides for synthesizing key intermediates and cyclization activities, allowing for bioconversion and in vitro production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional extraction methods from musk deer are used, then muscone can be obtained, but the process is labor-intensive and inefficient

Engineering Contradiction:

Improveproduction efficiencyVSAvoidlabor intensity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent replaces traditional mechanical extraction methods with a biological production system using recombinant host cells. The host cells are engineered to express a complete biosynthetic pathway that converts readily available substrates into muscone and civetone through enzymatic reactions, eliminating the need for labor-intensive animal sourcing and chemical extraction processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The recombinant host cells are designed to autonomously perform the entire biosynthetic pathway from substrate to final product. The cells self-regulate the expression of multiple enzymes required for converting substrates through various intermediates to muscone and civetone, eliminating the need for manual intervention at each step of the synthesis process.

Inventive Principle:

Principle #25Self-service

2Reliability

If synthetic methods are used to produce muscone, then ethical concerns are addressed, but high yields of precursors and intermediates are required

Engineering Contradiction:

Improveethical sustainabilityVSAvoidprecursor yield requirement

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent divides the complex biosynthetic pathway into discrete enzymatic steps, each catalyzed by a specific recombinantly expressed enzyme. This segmentation allows for precise control and optimization of each transformation step, ensuring high conversion efficiency and minimizing the accumulation of intermediate precursors that would need to be managed in synthetic routes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent optimizes multiple parameters including substrate concentration, induction conditions, and expression levels of pathway enzymes to maximize flux through the biosynthetic pathway. By controlling these parameters, the system achieves high product yields directly from the host cells without requiring large-scale accumulation and purification of intermediate precursors.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If a complete biosynthetic pathway is engineered in recombinant hosts, then high yields of macrocyclic ketones are achieved, but the genetic modification process becomes complex

Engineering Contradiction:

Improvemacrocyclic ketone yieldVSAvoidgenetic modification complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines multiple genes encoding enzymes for the complete biosynthetic pathway into a single recombinant host cell system. All necessary enzymes from substrate conversion through intermediate formation to final macrocyclic ketone production are co-expressed in one biological factory, simplifying the overall process architecture despite the complexity of individual genetic modifications.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The recombinant host cell system is designed to perform multiple functions within a single platform: substrate uptake, enzymatic transformations through multiple pathway steps, and product secretion. This multi-functional design consolidates what would otherwise require separate processing steps into one integrated biological system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 approach enables efficient and high-yield production of muscone and civetone precursors and ketones, addressing the inefficiencies and ethical concerns of traditional methods while providing a sustainable solution for the fragrance industry.