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Title: Rational Control of Calcium Carbonate Precipitation by Engineered Escherichia coli

Journal Article · · ACS Synthetic Biology
 [1];  [2];  [1]; ORCiD logo [3];  [1];  [4];  [2];  [2]; ORCiD logo [2]
  1. Renewable and Sustainable Energy Inst. (RASEI), Boulder, CO (United States)
  2. Univ. of Colorado, Boulder, CO (United States). Dept. of Civil, Environmental, and Architectural Engineering
  3. Renewable and Sustainable Energy Inst. (RASEI), Boulder, CO (United States); Univ. of Colorado, Boulder, CO (United States). Dept. of Chemical and Biological Engineering
  4. 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
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (2)

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