SCMV Viral Vector for Monocot Gene Expression
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Solution Overview
Problem
Current methods for genetic manipulation in monocot plants are inefficient and costly, particularly for expressing foreign genes, as they rely on time-consuming transgenic production and lack effective vectors for rapid protein production and evaluation.
Innovation Solution
Development of Sugarcane mosaic virus (SCMV) based vectors with a nucleic acid construct and multiple cloning sites for foreign gene expression in monocot plants, including maize, which are engineered to be non-aphid transmissible and optimized for biolistic inoculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transgenic production methods are used for foreign gene expression in monocot plants, then stable genetic transformation is achieved, but the process is time-consuming and costly
Solution Approach 1:
The patent uses a viral vector (SCMV-based expression system) as an intermediary carrier to deliver foreign genes into monocot plant cells. Instead of directly transforming the plant genome through complex transgenic methods, the viral vector serves as a mediator that can efficiently transfer and express foreign genes transiently, significantly reducing the time required while maintaining reliable gene expression.
Solution Approach 2:
The patent employs a viral replication mechanism where the viral vector replicates within the host plant cells, producing multiple copies of the foreign gene. This self-replicating approach amplifies the foreign gene expression without requiring repeated transformation events, thereby reducing time and cost while ensuring stable and sufficient gene expression levels.
2Productivity
If viral vectors are used for rapid protein production in plants, then expression speed and yield are improved, but the risk of insect-vectored transmission increases
Solution Approach 1:
The patent modifies the viral vector to eliminate its natural insect-transmissibility while retaining its ability to replicate and express foreign genes efficiently in plant cells. By removing the harmful transmission capability through genetic engineering (modifying the coat protein gene), the patent converts a potentially harmful feature into a beneficial controlled system that maintains high productivity without the risk of uncontrolled spread via insect vectors.
3Stability of the object's composition
If conventional transgenic methods are used for gene manipulation in monocots, then stable integration is achieved, but cost-effectiveness deteriorates
Solution Approach 1:
The patent employs a transient expression system using viral vectors that do not require stable genomic integration. The viral vectors are designed for temporary expression of foreign genes, after which they are degraded by the plant's natural defense mechanisms. This disposable approach eliminates the need for expensive and time-consuming stable transformation procedures, significantly reducing costs while still achieving sufficient gene expression for protein production and evaluation purposes.
Data Source
AI summary
The present invention provides plant virus vectors developed from the Sugarcane mosaic virus (SCMV). The vectors include a nucleic acid sequence encoding an infectious Sugarcane mosaic virus (SCMV) operably linked to one or more regulatory elements functional in a plant. The plant virus vectors may be used to infect monocot plants, such as maize, for gene expression applications.