Tiffany Halvorsen

SynBio | Microbiology | Microbial Genomics

Livermore

Research Expertise

Synthetic Biology
Biotechnology
Biomedical Engineering
Bioengineering
Applied Microbiology and Biotechnology
Microbiology

About

Highly driven microbiologist with a passion for applying microbial physiology & synthetic biology to the creation of a circular economy with environmentally-conscious technologies.

Publications

Comparison of Kill Switch Toxins in Plant-Beneficial Pseudomonas fluorescens Reveals Drivers of Lethality, Stability, and Escape

ACS Synthetic Biology / Nov 08, 2022

Halvorsen, T. M., Ricci, D. P., Park, D. M., Jiao, Y., & Yung, M. C. (2022). Comparison of Kill Switch Toxins in Plant-Beneficial Pseudomonas fluorescens Reveals Drivers of Lethality, Stability, and Escape. ACS Synthetic Biology, 11(11), 3785–3796. https://doi.org/10.1021/acssynbio.2c00386

Escherichia coli EC93 deploys two plasmid-encoded class I contact-dependent growth inhibition systems for antagonistic bacterial interactions

Microbial Genomics / Mar 01, 2021

Wäneskog, M., Halvorsen, T., Filek, K., Xu, F., Hammarlöf, D. L., Hayes, C. S., Braaten, B. A., Low, D. A., Poole, S. J., & Koskiniemi, S. (2021). Escherichia coli EC93 deploys two plasmid-encoded class I contact-dependent growth inhibition systems for antagonistic bacterial interactions. Microbial Genomics, 7(3). https://doi.org/10.1099/mgen.0.000534

Leveraging microfluidic dielectrophoresis to distinguish compositional variations of lipopolysaccharide in E. coli

Frontiers in Bioengineering and Biotechnology / Feb 16, 2023

Wang, Q., Kim, H., Halvorsen, T. M., Chen, S., Hayes, C. S., & Buie, C. R. (2023). Leveraging microfluidic dielectrophoresis to distinguish compositional variations of lipopolysaccharide in E. coli. Frontiers in Bioengineering and Biotechnology, 11. https://doi.org/10.3389/fbioe.2023.991784

Electrogenetic signaling and information propagation for controlling microbial consortia via programmed lysis

Biotechnology and Bioengineering / Feb 09, 2023

VanArsdale, E., Navid, A., Chu, M. J., Halvorsen, T. M., Payne, G. F., Jiao, Y., Bentley, W. E., & Yung, M. C. (2023). Electrogenetic signaling and information propagation for controlling microbial consortia via programmed lysis. Biotechnology and Bioengineering, 120(5), 1366–1381. Portico. https://doi.org/10.1002/bit.28337

Lipidation of Class IV CdiA Effector Proteins Promotes Target Cell Recognition during Contact-Dependent Growth Inhibition

mBio / Oct 26, 2021

Halvorsen, T. M., Garza-Sánchez, F., Ruhe, Z. C., Bartelli, N. L., Chan, N. A., Nguyen, J. Y., Low, D. A., & Hayes, C. S. (2021). Lipidation of Class IV CdiA Effector Proteins Promotes Target Cell Recognition during Contact-Dependent Growth Inhibition. MBio, 12(5). https://doi.org/10.1128/mbio.02530-21

Education

Northern Arizona University

B.S., Biology / May, 2014

Flagstaff, Arizona, United States of America

University of California, Santa Barbara

Ph.D., Molecular Biology & Biochemistry / December, 2020

Santa Barbara, California, United States of America

Experience

Lawrence Livermore National Laboratory

Synthetic Biology Postdoctoral Researcher / February, 2021February, 2024

I designed and tested the stability of an array of kill switches for biocontainment of agricultural bacteria. My findings contributed to the rational design of stable yet effective containment systems in soil bacteria.

Lawrence Livermore National Laboratory

Staff Research Scientist — Synthetic Biology / February, 2024Present

I wrote a successful proposal to design a synthetic extremophile for bio manufacturing of sustainable plastics without the need for sterilization at any stage of the production process.

University of California, Santa Barbara

Graduate Student Researcher, Biomolecular Science & Engineering / September, 2014December, 2020

I studied the mechanism of (1) cell binding/adhesion by contact-dependent growth inhibition (CdiA) proteins and (2) how the ionophore toxins that they deliver into neighboring bacteria exploit native membrane proteins to enter the bilayer.

Links & Social Media

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