A novel biosensor selective for organoarsenicals
Jian Chen1, Yong-Guan Zhu, Barry P Rosen
1Department of Cellular Biology and Pharmacology, Florida International University, Herbert Wertheim College of Medicine, Miami, Florida, USA.
Applied and Environmental Microbiology
|July 31, 2012
Summary
Researchers developed a novel biosensor that detects specific organoarsenicals, unlike existing sensors that only identify inorganic arsenic. This advancement aids in monitoring the breakdown of arsenic-based agricultural chemicals.
Area of Science:
- Environmental Science
- Microbiology
- Biotechnology
Background:
- Organoarsenicals are used as herbicides and animal growth promoters.
- These compounds degrade into inorganic arsenic in the environment.
- Current bacterial biosensors can only detect inorganic arsenic, not its organoarsenical precursors.
Purpose of the Study:
- To develop a biosensor capable of detecting trivalent organoarsenicals.
- To differentiate between organoarsenicals and inorganic arsenic.
- To provide a tool for monitoring the degradation of arsenic-containing agricultural products.
Main Methods:
- Engineered a bacterial whole-cell biosensor.
- Designed the biosensor for selectivity towards trivalent organoarsenicals like methylarsenite and phenylarsenite.
- Tested the biosensor's response to various arsenic compounds, including inorganic arsenite.
Main Results:
- The novel biosensor demonstrated selectivity for trivalent organoarsenicals (methylarsenite and phenylarsenite).
- The sensor distinguished organoarsenicals from inorganic arsenite.
- This specificity offers a new method for arsenic compound detection.
Conclusions:
- A new bacterial biosensor selectively detects trivalent organoarsenicals.
- This biosensor can identify specific organoarsenicals over inorganic arsenic.
- The sensor is potentially valuable for tracking the environmental degradation of arsenic-based herbicides and growth promoters.
