A - Papers appearing in refereed journals
Pudney, A., Gandini, C., Economou, C., Smith, Richard T., Goddard, P., Napier, J. A., Spicer, A. and Sayanova, O. V. 2019. Multifunctionalizing the marine diatom Phaeodactylum tricornutum for sustainable co-production of omega-3 long chain polyunsaturated fatty acids and recombinant phytase. Scientific Reports. 9 (1), p. 11444.
|Authors||Pudney, A., Gandini, C., Economou, C., Smith, Richard T., Goddard, P., Napier, J. A., Spicer, A. and Sayanova, O. V.|
There is an urgent requirement for sustainable sources of food and feed due to world population growth. Aquaculture relies heavily on the fish meal and fish oils derived from capture fisheries, challenging sustainability of the production system. Furthermore, substitution of fish oil with vegetable oil and fish meal with plant seed meals in aquaculture feeds reduces the levels of valuable omega-3 long chain polyunsaturated fatty acids such as eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids, and lowers the nutritional value due to the presence of phytate. Addition of exogenous phytase to ﬁsh feed is beneficial for enhancing animal health and reducing phosphorus pollution. We have engineered the marine diatom Phaeodactylum tricornutum, accumulating high levels of EPA and DHA together with recombinant proteins: the fungal Aspergillus niger PhyA or the bacterial Escherichia coli AppA phytases. The removal of the N-terminal signal peptide further increased phytase activity. Strains engineered with fcpA and CIP1 promoters showed the highest level of phytase activity. The best engineered strain achieved up to 40,000 phytase activity units (FTU) per gram of soluble protein, thus demonstrating the feasibility of development of multifunctionalized microalgae to simultaneously produce industrially useful proteins and fatty acids to meet the demand of intensive fish farming activity.
|Year of Publication||2019|
|Journal citation||9 (1), p. 11444|
|Digital Object Identifier (DOI)||doi:10.1038/s41598-019-47875-1|
|Open access||Published as green open access|
|Funder project or code||Pilot Algal Lipid Manufacturing in the United Kingdom (PALM-UK)|
|Funder||Biotechnology and Biological Sciences Research Council|
|Other file||Pudney et al_SREP-18-30182D-revised.pdf|
|Online||07 Aug 2019|
|Publication process dates|
|Accepted||23 Jul 2019|
|Publisher||Nature Publishing Group|
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