Engineered WRI1 Polypeptide for Triacylglycerol Yield
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Solution Overview
Problem
Traditional methods for producing vegetable oils are insufficient to meet the rapidly increasing global demand, necessitating the development of new approaches to enhance oil yields in plants.
Innovation Solution
An isolated polynucleotide encoding a polypeptide with an amino acid substitution at position 74 of the wild-type Wrinkled1 (WRI1) polypeptide, which increases the affinity for DNA binding and subsequently enhances oil production in transgenic plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional production methods are used, then current oil production levels are maintained, but global demand for vegetable oils cannot be met
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence of the WRI1 protein at specific positions (position 74 and other positions as set forth in SEQ ID NO: 1) to enhance its transcriptional activity. This molecular parameter change leads to increased expression of fatty acid biosynthesis genes, thereby increasing triacylglycerol production and oil yield in transgenic plants, directly addressing the supply-demand gap in vegetable oils
2Productivity
If wild-type WRI1 polypeptide is used, then normal oil production is maintained, but triacylglycerol production is insufficient for meeting high demand
Solution Approach 1:
The patent modifies the molecular parameters of the WRI1 protein by introducing amino acid substitutions at position 74 and other positions defined in SEQ ID NO: 1. These parameter changes enhance the protein's ability to bind to promoter regions and activate fatty acid biosynthesis genes, resulting in over 60% increase in triacylglycerol production compared to wild-type WRI1
Solution Approach 2:
The patent creates a modified copy of the wild-type WRI1 polypeptide sequence (SEQ ID NO: 2) that incorporates beneficial amino acid substitutions. This engineered copy is introduced into plants via transgenic techniques to achieve enhanced oil production, effectively copying the functional framework of wild-type WRI1 while improving its performance
Data Source
AI summary
The present invention relates to isolated polynucleotides or polypeptides that lead to improved plant oil yields. Disclosed herein is an isolated polynucleotide encoding a polypeptide that is distinguished from a wild-type Wrinkledt polypeptide by at least one amino acid substitution in the wild-type Wrinkledt amino acid sequence. In an embodiment, the at least one amino acid substitution comprises an amino acid substitution at a position corresponding to position 74 as set forth in SEQ ID NO: 1. In another embodiment, the substitution at position 74 is an amino acid substitution to a positively charged residue, wherein the positively charged residue is arginine or lysine.