Recombinant Algal Gene Attenuation for Higher Lipid Productivity
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Solution Overview
Problem
Wild type algal strains have not been sufficiently productive to permit an economically viable development of algal-sourced biofuels, necessitating higher levels of cell productivity for efficient utilization of this energy source.
Innovation Solution
Recombinant algal mutants with genetic modifications to nucleic acid sequences encoding trehalose biosynthetic enzymes and/or RNA binding domains, optionally combined with SGI1 polypeptide modifications, exhibit increased lipid productivity through attenuation of these genes, which can be stacked to further enhance production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wild type algal strains are used for biofuel production, then the production process is simple, but lipid productivity is insufficient for economic viability
Solution Approach 1:
The patent applies parameter changes by modifying specific genetic parameters (nucleic acid sequences encoding trehalose biosynthetic enzymes and RNA binding domains) to alter the metabolic parameters of algal cells, thereby increasing lipid productivity from insufficient levels to economically viable levels while maintaining controlled complexity through targeted modifications
Solution Approach 2:
The patent replaces conventional breeding or selection methods with genetic engineering approaches, substituting mechanical/selective processes with precise molecular biology techniques to achieve the desired lipid productivity improvement more efficiently
2Productivity
If multiple genetic modifications are stacked in algal mutants, then lipid productivity increases significantly, but the complexity of genetic engineering increases
Solution Approach 1:
The patent merges multiple genetic modifications into single algal mutant strains, combining alterations in trehalose biosynthetic enzyme genes and RNA binding domain genes to achieve synergistic effects that significantly boost lipid productivity beyond what single modifications could achieve
Solution Approach 2:
The patent segments the genetic modification process into modular components (different gene targets, various attenuation strategies) that can be independently designed, tested, and combined, allowing systematic optimization of lipid productivity while managing engineering complexity
Data Source
AI summary
The invention involves the provision of recombinant algal mutants that have a genetic modification to a nucleic acid sequence encoding a trehalose biosynthetic enzyme, and/or a genetic modification to a nucleic acid encoding an RNA binding domain And in some embodiments either of these algal mutants can further have a genetic mutation to a nucleic acid sequence encoding an SGI1 polypeptide. Attenuation of one, two, or all three of these genes results in a mutant organism with increased lipid productivity. It was also discovered that one, two, three, or more genetic mutations can be accumulated or “stacked” in a particular mutant cell or organism to result in further increases in the production of lipid products. The lipid products of these mutants are useful as biofuels or for other specialty chemical products.