CPT and NgBR Protein Binding for Rubber Synthesis
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Solution Overview
Problem
The current methods for producing natural rubber rely heavily on mature Hevea brasiliensis trees, which are limited in geographical availability and have a long maturation period, and the biosynthesis mechanism of natural rubber remains poorly understood, limiting the potential for increased production.
Innovation Solution
A method involving the binding of cis-prenyltransferase (CPT) family proteins and Nogo-B receptor (NgBR) family proteins to rubber particles in vitro to enhance rubber synthesis activity, combined with a vector that drives laticifer-specific gene expression to increase polyisoprenoid production in plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Hevea brasiliensis trees are cultivated to produce natural rubber, then natural rubber can be obtained, but the production is limited by geographical availability and long maturation period
Solution Approach 1:
The patent extracts the rubber synthesis capability from the mature tree system by isolating and expressing CPT and NgBR proteins in transgenic plants. This allows rubber production to occur without waiting for trees to mature, effectively separating the production function from the long maturation requirement of Hevea brasiliensis
Solution Approach 2:
The patent uses transgenic plants as intermediaries to produce rubber. By introducing CPT and NgBR genes into plants like tobacco or Arabidopsis, these plants become mediator systems that can synthesize rubber particles without requiring the original Hevea brasiliensis tree structure, thus bypassing the maturation time constraint
2Reliability
If CPT expression is suppressed in Taraxacum brevicorniculatum, then rubber synthesis is reduced, but this confirms CPT's essential role in natural rubber biosynthesis
Solution Approach 1:
The patent optimizes rubber production by co-expressing CPT and NgBR proteins, which stabilizes CPT activity. This parameter optimization ensures high-level rubber synthesis while maintaining reliable CPT function, overcoming the limitation observed when CPT expression is simply suppressed
3Quantity of substance
If exogenous genes are introduced into plants to improve rubber productivity, then rubber production can be enhanced, but metabolic load may be imposed on the plant
Solution Approach 1:
The patent localizes rubber synthesis to specific cellular compartments by targeting CPT and NgBR to rubber particle formation. This localized production minimizes metabolic disruption to the rest of the plant system, as the transgenic plants can maintain normal metabolism while producing rubber in specialized compartments
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 stabilizes and increases the activity of CPT proteins, leading to enhanced rubber production efficiency and the ability to produce high-yield polyisoprenoids for use in rubber products like pneumatic tires, addressing the limitations of traditional rubber production.
Implementation Method 1
binding a protein expressed by a gene coding for a cis-prenyltransferase (CPT) family protein and a protein expressed by a gene coding for a Nogo-B receptor (NgBR) family protein to rubber particles in vitro
Data Source
AI summary
The present invention provides a method for producing a polyisoprenoid with which it is possible to enhance the rubber synthesis activity of rubber particles to increase natural rubber production. The present invention relates to a method for producing a polyisoprenoid in vitro, which involves the use of a gene coding for a cis-prenyltransferase (CPT) family protein and a gene coding for a Nogo-B receptor (NgBR) family protein, and further involves the use of rubber particles bound to proteins encoded by these genes; or a method for producing a polyisoprenoid, which includes introducing into a plant a vector in which a promoter having a promoter activity that drives laticifer-specific gene expression is linked to a gene coding for a CPT family protein and a gene coding for a NgBR family protein, to express proteins encoded by the genes specifically in laticifers.