NIN Gene Auxin-Responsive Element Engineering
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Solution Overview
Problem
The precise mechanism of NODULE INCEPTION (NIN) involvement in root nodule organogenesis is not fully understood, hindering successful nodule engineering approaches, as knowledge of NIN regulation is required for effective nitrogen-fixing plant engineering.
Innovation Solution
Introducing auxin-responsive elements (AuxREs) into the regulatory regions of the NIN or NLP coding sequences to enhance the activity of NIN proteins in response to auxin signaling, allowing for better regulation and induction of root nodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NIN regulatory regions are left unmodified, then the natural regulation mechanism is preserved, but the ability to engineer nodulation is limited
Solution Approach 1:
The patent segments the NIN regulatory region into distinct functional elements (promoter, enhancer, response elements) that can be independently modified. By introducing auxin-responsive elements as separate modular components into the regulatory region, the system enables targeted engineering of nodulation without requiring complete redesign of the entire regulatory mechanism.
Solution Approach 2:
The patent introduces auxin-responsive elements as intermediary components that mediate between auxin signaling and NIN gene expression. These response elements act as molecular bridges that translate hormonal signals into transcriptional activation, providing a controllable interface for engineering nodulation while preserving the endogenous regulatory framework.
2Reliability
If auxin-responsive elements are introduced into NIN regulatory regions, then NIN protein activity in response to auxin signaling is enhanced, but the regulatory mechanism becomes more complex
Solution Approach 1:
The patent modifies the regulatory parameters of the NIN gene by introducing specific auxin-responsive element sequences into the regulatory region. This changes the transcriptional response characteristics of the gene, making it sensitive to auxin signaling and enabling controlled activation of NIN protein expression in response to hormonal cues.
Solution Approach 2:
The patent creates a composite regulatory structure by combining endogenous NIN regulatory sequences with exogenous auxin-responsive elements. This hybrid regulatory region integrates multiple functional components that work together to provide both constitutive and inducible control of NIN expression, enhancing reliability while managing complexity through functional integration.
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 increased activity of NIN proteins, facilitating the engineering of plants to form nodules more effectively, thereby improving nitrogen fixation capabilities.
Implementation Method 1
Introducing auxin-responsive elements (AuxREs) into the regulatory regions of the NIN or NLP coding sequences to enhance the activity of NIN proteins in response to auxin signaling
Data Source
AI summary
Aspects of the present disclosure relate to genetically modified plants comprising NODULE INCEPTION (NIN) and NIN-LIKE PROTEIN (NLP) that have been genetically altered to be responsive to auxin so that the NIN or NLP protein can induce root nodulation upon appropriate signaling.