Cited by 21Bacterial Genetics and BiotechnologyPhotosynthetic Processes and MechanismsBiochemical and Structural Characterization

Orthogonal Degron System for Controlled Protein Degradation in Cyanobacteria

Sakkos, Jonathan K., Hernandez-Ortiz, Sergio, Osteryoung, Katherine W., Ducat, Daniel C.·2021·ACS Synthetic Biology

Abstract

Synechococcus elongatus PCC 7942 is a model cyanobacterium for study of the circadian clock, photosynthesis, and bioproduction of chemicals, yet nearly 40% of its gene identities and functions remain unknown, in part due to limitations of the existing genetic toolkit. While classical techniques for the study of genes ( e.g., deletion or mutagenesis) can yield valuable information about the absence of a gene and its associated protein, there are limits to these approaches, particularly in the study of essential genes. Herein, we developed a tool for inducible degradation of target proteins in S. elongatus by adapting a method using degron tags from the Mesoplasma florum transfer-mRNA (tmRNA) system. We observed that M. florum lon protease can rapidly degrade exogenous and native proteins tagged with the cognate sequence within hours of induction. We used this system to inducibly degrade the essential cell division factor, FtsZ, as well as shell protein components of the carboxysome. Our results have implications for carboxysome biogenesis and the rate of carboxysome turnover during cell growth. Lon protease control of proteins offers an alternative approach for the study of essential proteins and protein dynamics in cyanobacteria.

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Crossref · 10.1021/acssynbio.1c00035

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  • Controlled degradation can be engineered deliberately using degron-based systems, providing a post-translational strategy to tune enzyme abundance, remove toxic pathway proteins or dynamically regulate metabolic flux.

    “Conversely, controlled degradation can be engineered deliberately using degron-based systems, providing a post-translational strategy to tune enzyme abundance, remove toxic pathway proteins or dynamically regulate metabolic flux [108].”

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Authors
Sakkos, J. K., Hernandez-Ortiz, S., Osteryoung, K. W., & Ducat, D. C.
Affiliations
Michigan State University (US)
Corresponding author
Ducat, Daniel C.
Venue
ACS Synthetic Biology
Published
2021-07-07
Volume
10
Issue
7
Pages
1667-1681
ISSN
2161-5063 (ISSN-L)
OpenAlex
W3177628571
Cited by
21
References
102
Citations by year
2026: 1 · 2025: 6 · 2024: 5 · 2023: 1 · 2022: 5 · 2021: 3
FWCI
1.98
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Synthetic Biology (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • U.S. Department of Energy (DE-FG02-91ER20021)
  • National Science Foundation (1517241)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Structural Characterization
Keywords
protein degradation, Lon protease, Mesoplasma florum, Synechococcus elongatus PCC 7942, cyanobacteria, FtsZ, essential genes, genetic toolkit
MeSH terms
Bacterial Proteins, Plant Proteins, Entomoplasmataceae, Synechococcus, Protease La, Proteolysis

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