Rational Control of Calcium Carbonate Precipitation by Engineered Escherichia coli
- Renewable and Sustainable Energy Inst. (RASEI), Boulder, CO (United States)
- Univ. of Colorado, Boulder, CO (United States). Dept. of Civil, Environmental, and Architectural Engineering
- Renewable and Sustainable Energy Inst. (RASEI), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). Dept. of Chemical and Biological Engineering
- Renewable and Sustainable Energy Inst. (RASEI), Boulder, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States). Dept. of Chemistry and Biochemistry
Ureolytic bacteria (e.g., Sporosarcina pasteurii) can produce calcium carbonate (CaCO3). Tailoring the size and shape of biogenic CaCO3 may increase the range of useful applications for these crystals. However, wild type Sporosarcina pasteurii is difficult to genetically engineer, limiting control of the organism and its crystal precipitates. Therefore, we designed, constructed, and compared different urease operons and expression levels for CaCO3 production in engineered Escherichia coli strains. We quantified urease expression and calcium uptake and characterized CaCO3 crystal phase and morphology for 13 engineered strains. There was a weak relationship between urease expression and crystal size, suggesting that genes surrounding the urease gene cluster affect crystal size. However, when evaluating strains with a wider range of urease expression levels, there was a negative relationship between urease activity and polycrystal size (e.g., larger crystals with lower activity). The resulting range of crystal morphologies created by the rationally designed strains demonstrates the potential for controlling biogenic CaCO3 precipitation.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- U.S. Department of Defense (DOD), Defense Advanced Research Projects Agency
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1484428
- Report Number(s):
- NREL/JA-2700-72870
- Journal Information:
- ACS Synthetic Biology, Vol. 7, Issue 11; ISSN 2161-5063
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Metal and metalloid immobilization by microbiologically induced carbonates precipitation
|
journal | March 2019 |
Engineered Ureolytic Microorganisms Can Tailor the Morphology and Nanomechanical Properties of Microbial-Precipitated Calcium Carbonate
|
journal | October 2019 |
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