Ncb5or Electron Transfer for Insect Pheromone Production
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Solution Overview
Problem
Current methods for producing insect pheromones, such as moth pheromones, are limited by the efficiency and specificity of enzymes like fatty acyl-CoA desaturases and reductases, which are integral membrane proteins requiring NADH or NADPH for electron transfer, and there is a lack of understanding of Ncb5or enzymes in insects.
Innovation Solution
Incorporating heterologous NAD(P)H cytochrome b5 oxidoreductases (Ncb5ors) into cells expressing fatty acyl-CoA desaturases and reductases enhances the activity and production of desaturated and saturated fatty alcohols, aldehydes, and acetates, leading to higher titer and purity of these compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heterologous Ncb5or is incorporated into cells expressing fatty acyl-CoA desaturases and reductases, then enzyme activity and production efficiency increase, but device complexity increases
Solution Approach 1:
The patent introduces Ncb5or as an intermediary electron transfer protein that mediates electron transfer from NADH/NADPH to cytochrome b5, which then donates electrons to desaturases. This intermediary system resolves the contradiction by providing a more efficient electron transfer pathway that boosts productivity while maintaining manageable system complexity through a well-defined biochemical mechanism.
Solution Approach 2:
The patent changes the biochemical parameters of the system by introducing heterologous Ncb5or expression, which alters the electron transfer kinetics and enzyme activity parameters. This parameter change increases production efficiency without fundamentally redesigning the entire system, thus managing complexity while improving productivity.
2Manufacturing precision
If Ncb5or is used to enhance desaturase activity, then titer and purity of pheromone compounds increase, but manufacturing complexity increases
Solution Approach 1:
By introducing Ncb5or as an intermediary that specifically enhances desaturase activity through improved electron transfer, the system achieves higher purity pheromone compounds with better stereochemical control, while the manufacturing process remains relatively simple through heterologous expression in host cells.
3Reliability
If classic CytB5Red/CytB5 system is used for electron transfer, then enzyme function is maintained, but production efficiency is limited
Solution Approach 1:
The patent changes the kinetic parameters of electron transfer by replacing or supplementing the classic CytB5Red/CytB5 system with Ncb5or, which has different biochemical properties including broader substrate specificity and potentially higher catalytic efficiency. This parameter change maintains reliable enzyme function while significantly improving production efficiency.
Solution Approach 2:
Ncb5or exhibits multi-functionality by being able to support both classic and non-classic desaturases, and can utilize both NADH and NADPH as electron donors. This universality allows it to maintain reliable enzyme function across different systems while improving overall productivity.
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 integration of Ncb5ors significantly increases the activity and production efficiency of enzymes involved in pheromone synthesis, resulting in higher yields and purities of desired compounds.
Implementation Method 1
They are thought to be integral membrane proteins receiving electrons from NADH supplied by cytochrome b5 reductase and cytochrome b5. The fatty acyl reductases convert saturated or desaturated fatty acyl-CoA's into saturated or desaturated fatty alcohols. These enzymes are also integral membrane proteins but are thought to receive electrons directly from NADPH.
Implementation Method 2
Several biosynthetic enzymes contribute to pheromone production, including fatty acyl-CoA desaturases and fatty acyl-CoA reductases. The desaturases introduce double-bonds into a fatty acyl-CoA. The fatty acyl reductases convert saturated or desaturated fatty acyl-CoA's into saturated or desaturated fatty alcohols.
Data Source
AI summary
Herein are provided methods for increasing enzymatic activity of desaturases and fatty acyl reductases by co-expressing NAD(P)H cytochrome b5 reductases (EC 1.6.2.2, Ncb5or), as well as to methods for production of compounds comprised in pheromones, in particular moth pheromones, such as saturated and desaturated fatty alcohols, and saturated and desaturated fatty alcohol acetates and fatty acids, and derivatives thereof, in a cell.