Designer diatom episomes delivered by bacterial conjugation
- J. Craig Venter Inst., La Jolla, CA (United States). Synthetic Biology and Bioenergy Group; Synthetic Biology and Bioenergy Group, J. Craig Venter Institute, La Jolla, California 92037
- J. Craig Venter Inst., La Jolla, CA (United States). Microbial and Environmental Genomics Group; Univ. of California, San Diego, CA (United States). Integrative Oceanography Division. Scripps Inst. of Oceanography
- J. Craig Venter Inst., La Jolla, CA (United States). Microbial and Environmental Genomics Group
- J. Craig Venter Inst., La Jolla, CA (United States). Synthetic Biology and Bioenergy Group
- Univ. of California, San Diego, CA (United States). National Center for Microscopy and Imaging Research
- J. Craig Venter Inst., La Jolla, CA (United States). Synthetic Biology and Bioenergy Group. Microbial and Environmental Genomics Group
Eukaryotic microalgae hold great promise for the bioproduction of fuels and higher value chemicals. However, compared with model genetic organisms such as Escherichia coli and Saccharomyces cerevisiae, characterization of the complex biology and biochemistry of algae and strain improvement has been hampered by the inefficient genetic tools. To date, many algal species are transformable only via particle bombardment, and the introduced DNA is integrated randomly into the nuclear genome. Here we describe the first nuclear episomal vector for diatoms and a plasmid delivery method via conjugation from Escherichia coli to the diatoms Phaeodactylum tricornutum and Thalassiosira pseudonana. We identify a yeast-derived sequence that enables stable episome replication in these diatoms even in the absence of antibiotic selection and show that episomes are maintained as closed circles at copy number equivalent to native chromosomes. This highly efficient genetic system facilitates high-throughput functional characterization of algal genes and accelerates molecular phytoplankton research.
- Research Organization:
- J. Craig Venter Inst., La Jolla, CA (United States)
- Sponsoring Organization:
- Gordon and Betty Moore Foundation (United States); Natural Sciences and Engineering Research Council of Canada (NSERC); Synthetic Genomics Inc. (United States); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
- Grant/Contract Number:
- SC0008593
- OSTI ID:
- 1455147
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 6; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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