Abstract:
PROBLEM TO BE SOLVED: To provide other PUFA PKS systems having greater flexibility for a biological system that efficiently produces quantities of lipids (PL and TAG) enriched in desired PUFAs, such as EPA.SOLUTION: The invention generally relates to polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems, to homologues thereof, to isolated nucleic acid molecules and recombinant nucleic acid molecules encoding biologically active domains of such a PUFA PKS system, to genetically modified organisms comprising PUFA PKS systems, to methods of making and using such systems for the production of bioactive molecules of interest, and to new methods for identifying new bacterial and non-bacterial microorganisms having such a PUFA PKS system.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for proliferating eukaryotic microorganisms which can produce lipids, in particular lipids containing polyenoic fatty acids, and a method for producing lipids of the eukaryotic microorganisms.SOLUTION: There are provided the method for proliferating eukaryotic microorganisms capable of producing at least about 20% of eukaryotic microorganism biomass as lipids, and the method for producing lipids of the same. The lipids preferably contain one or more polyenoic fatty acids, and a carbon source, preferably a non-alcohol carbon source, and restricted nutrient sources are added to a fermentation medium containing the eukaryotic microorganisms. The carbon source and the restricted nutrient sources are preferably added at a sufficient rate to increase biomass density of the fermentation medium at least at about 100 g/L.
Abstract:
PROBLEM TO BE SOLVED: To provide a process for growing eukaryotic microorganisms which are capable of producing lipids, in particular lipids containing polyenoic fatty acids, and to provide a process for producing eukaryotic microbial lipids.SOLUTION: The present invention provides a process for growing eukaryotic microorganisms which are capable of producing at least about 20% of their biomass as lipids and a method for producing the lipids. Preferably the lipids contain one or more polyenoic fatty acids. The process comprises adding to a fermentation medium comprising eukaryotic microorganisms a carbon source, preferably a non-alcoholic carbon source, and a limited nutrient source. Preferably, the carbon source and the limited nutrient source are added at a rate sufficient to increase the biomass density of the fermentation medium to at least about 100 g/L.
Abstract:
PROBLEM TO BE SOLVED: To provide polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems isolated or derived from non-bacterial organisms, homologues thereof, isolated nucleic acid molecules and recombinant nucleic acid molecules encoding biologically active domains of such a PUFA PKS system, methods for making and using such systems for the production of bioactive molecules of interest, and new methods for identifying new bacterial and non-bacterial microorganisms having such a PUFA PKS system.SOLUTION: There are provided a nucleic acid sequence encoding at least one domain of polyunsaturated fatty acid (PUFA) polyketide synthase (PKS) systems derived from Thraustochytrid microorganisms, recombinant microorganisms and recombinant plants transfected with recombinant nucleic acid molecules and a selection method thereof, and a method for producing polyunsaturated fatty acid using those microorganisms.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of proliferating eukaryotic microbes capable of producing a lipid, particularly a polyenoic fatty acid-containing lipid, and to provide a method of producing eukaryotic microbial lipids.SOLUTION: There are provided the method of proliferating the eukaryotic microorganisms capable of producing at least about 20% of an eukaryotic microorganisms biomass as lipids and the method of producing the lipids. The lipids preferably contain one or more polyenoic fatty acids. A carbon source, preferably a non-alcohol carbon source and a restricted nutrient source are added to a fermentation medium containing the eukaryotic microorganisms. The carbon source and the restricted nutrient source are preferably added at a rate sufficiently enough to increase the biomass density of the fermentation medium to at least about 100 g/L.