Title: Identification, Characterization, and Application of a Highly Sensitive Lactam Biosensor from Pseudomonas putida

Journal Article · · ACS Synthetic Biology
 [1];  [2];  [3];  [4];  [2];  [5];  [6];  [1];  [7];  [2]; ORCiD logo [8]; ORCiD logo [6]; ORCiD logo [9]
  1. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology
  2. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; USDOE Agile BioFoundry, Emeryville, CA (United States)
  4. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology; Instituto Tecnologico y de Estudios superiores de Monterrey, Monterrey (Mexico). Centro de Biotecnologia FEMSA
  5. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology; USDOE Agile BioFoundry, Emeryville, CA (United States)
  6. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Comparative Biochemistry Graduate Group
  7. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Joint Program in Bioengineering
  8. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Dept. of Plant and Microbial Biology; USDOE Agile BioFoundry, Emeryville, CA (United States); Basque Center for Applied Mathematics (BCAM), Bilbao (Spain)
  9. Joint BioEnergy Institute (JBEI), Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Biological Systems & Engineering Div.; Univ. of California, Berkeley, CA (United States). Joint Program in Bioengineering; Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering; Technical Univ. of Denmark, Lyngby (Denmark). Novo Nordisk Foundation Center for Biosustainability; Shenzhen Univ. (China)

Caprolactam is an important polymer precursor to nylon traditionally derived from petroleum and produced on a scale of 5 million tons per year. Current biological pathways for the production of caprolactam are inefficient with titers not exceeding 2 mg/L, necessitating novel pathways for its production. As development of novel metabolic routes often require thousands of designs and result in low product titers, a highly sensitive biosensor for the final product has the potential to rapidly speed up development times. Here we report a highly sensitive biosensor for valerolactam and caprolactam from Pseudomonas putida KT2440 which is > 1000 × more sensitive to an exogenous ligand than previously reported sensors. Manipulating the expression of the sensor oplR (PP_3516) substantially altered the sensing parameters, with various vectors showing Kd values ranging from 700 nM (79.1 μg/L) to 1.2 mM (135.6 mg/L). Our most sensitive construct was able to detect in vivo production of caprolactam above background at~6 μg/L. The high sensitivity and range of OplR is a powerful tool toward the development of novel routes to the biological synthesis of caprolactam.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1782137
Journal Information:
ACS Synthetic Biology, Journal Name: ACS Synthetic Biology Journal Issue: 1 Vol. 9; ISSN 2161-5063
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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