Development and Application of a Synthetically-Derived Lead Biosensor Construct for Use in Gram-Negative Bacteria

Overview

Journal Sensors (Basel)

Publisher MDPI

Specialty Biotechnology

Date 2016 Dec 22

PMID 27999352

Citations 18

Authors

Lara Bereza-Malcolm

Sanja Aracic

Ashley E Franks

Affiliations

Soon will be listed here.

Abstract

The use of lead in manufacturing has decreased significantly over the last few decades. However, previous widespread use of lead-containing products and their incorrect disposal has resulted in environmental contamination. Accumulation of harmful quantities of lead pose a threat to all living organisms, through inhalation, ingestion, or direct contact, resulting in lead poisoning. This study utilized synthetic biology principles to develop plasmid-based whole-cell bacterial biosensors for detection of lead. The genetic element of the lead biosensor construct consists of , which encodes the regulatory protein, together with its divergent promoter region and a promoterless . GFP expression is controlled by PbrR in response to the presence of lead. The lead biosensor genetic element was cloned onto a low-copy number broad host range plasmid, which can stably exist in a range of laboratory and environmental isolates, including , , and . The biosensors constructed were found to be sensitive, rapid, and specific and could, as such, serve as monitoring tools for lead-contaminated water.

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