Recombinant methanotrophic bacteria for indigo biosynthesis and methods thereof
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Solution Overview
Problem
The chemical synthesis of indigo poses environmental and health hazards due to the use of hazardous chemicals and pollutants, necessitating a scalable, cost-effective, and eco-friendly biological route for indigo production.
Innovation Solution
Engineering recombinant methanotrophic bacteria with specific genes to convert methane into indigo through the shikimic acid pathway, utilizing genes such as tryptophanase (TnaA), mutant TrpB, flavin-containing monooxygenase (FMO), and acyl-CoA dehydrogenase-like protein (IacA) to enhance indole concentration and conversion to indoxyl, followed by oxidation to indigo.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical synthesis route is used for indigo production, then productivity and manufacturing scale are improved, but environmental pollution and health hazards worsen due to use of hazardous chemicals
Solution Approach 1:
The patent replaces the chemical synthesis system with a biological system. Recombinant methanotrophic bacteria are engineered to produce indigo through metabolic pathways, substituting chemical reactions with enzymatic catalysis. This eliminates the need for hazardous chemicals like aniline, formaldehyde, and sodium dithionite, while maintaining industrial-scale production capability through fermentation processes.
Solution Approach 2:
The patent introduces bacterial metabolic pathways as intermediary systems between methane and indigo production. The engineered bacteria serve as biological mediators that convert methane through the shikimic acid pathway and tryptophan metabolism to produce indigo, replacing direct chemical synthesis and eliminating harmful intermediate chemicals.
2Productivity
If chemical synthesis with strong reducing agents is used, then indigo production efficiency is improved, but effluent pollution and public health risks worsen
Solution Approach 1:
The patent replaces chemical reduction processes with biological reduction pathways. The engineered bacteria use endogenous enzymatic systems to reduce indole to indoxyl and facilitate indigo formation, eliminating the need for external strong reducing agents like sodium dithionite and preventing associated effluent pollution.
Solution Approach 2:
The bacterial system performs self-service by utilizing its own metabolic pathways and enzymatic capabilities to complete the indigo synthesis process. The bacteria generate necessary reducing equivalents through their metabolism and use internal enzymes for all transformation steps, eliminating dependency on external hazardous chemicals.
3Ease of manufacture
If natural indigo production is replaced by chemical synthesis, then cost-effectiveness and scalability are improved, but environmental sustainability worsens
Solution Approach 1:
The patent uses engineered bacteria as intermediary systems that bridge natural sustainability with industrial production requirements. The bacterial cells serve as living factories that maintain environmental compatibility while achieving scalable production through controlled fermentation, combining the benefits of natural processes with industrial efficiency.
Solution Approach 2:
The patent optimizes various parameters of the biological system including bacterial growth conditions, substrate concentration, induction timing, and fermentation parameters to achieve cost-effective industrial production. By controlling these parameters, the system maintains economic viability while preserving environmental sustainability through biological rather than chemical processes.
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
Provides a commercially scalable, cost-effective, and environmentally friendly method for indigo production, avoiding hazardous chemicals and reducing environmental impact.
Implementation Method 1
a gene encoding enzyme for increasing concentration of indole... conversion of tryptophan to indole
Implementation Method 2
a gene encoding mutant beta subunit of tryptophan synthase (mutant TrpB)... reduces or prevents tryptophan formation from indole
Implementation Method 3
a gene encoding enzyme for converting the indole to indoxyl... the oxidase is an indole oxidase
Implementation Method 4
the indole oxidase is flavin-containing monooxygenase (FMO)
Implementation Method 5
the dehydrogenase is acyl-CoA dehydrogenase-like protein (IacA)... converting the indole to indoxyl
Data Source
AI summary
The instant disclosure is in the field of biosciences, more particularly towards molecular and industrial biotechnology. The present disclosure relates to recombinant methanotrophic bacteria capable of synthesizing indigo from methane comprising a gene encoding enzyme for increasing concentration of indole and a gene encoding enzyme for converting the indole to indoxyl. The present disclosure also relates to a method of developing the recombinant methanotrophic bacteria, and a method of indigo biosynthesis by the recombinant methanotrophic bacteria in presence of a methane source.