Multifunctionalizing the marine diatom Phaeodactylum tricornutum for sustainable co-production of omega-3 long chain polyunsaturated fatty acids and recombinant phytase

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.

AuthorsPudney, A., Gandini, C., Economou, C., Smith, Richard T., Goddard, P., Napier, J. A., Spicer, A. and Sayanova, O. V.
Abstract

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 Publication2019
JournalScientific Reports
Journal citation9 (1), p. 11444
Digital Object Identifier (DOI)doi:10.1038/s41598-019-47875-1
Open accessPublished as green open access
Funder project or codePilot Algal Lipid Manufacturing in the United Kingdom (PALM-UK)
FunderBiotechnology and Biological Sciences Research Council
Publisher's versions41598-019-47875-1.pdf
Other filePudney et al_SREP-18-30182D-revised.pdf
Output statusPublished
Publication dates
Online07 Aug 2019
Publication process dates
Accepted23 Jul 2019
PublisherNature Publishing Group
ISSN2045-2322

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