Related Experiment Video
Updated: May 31, 2026
15:28
Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
Published on: November 16, 2012
Inducible Bacterial Adhesion to Plastic Surfaces for Enhanced Biodegradation
Arianna Schneier1, Benjamín O Armijo-Galdames1, Elizabeth C H T Lau1
1Institute of Quantitative Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh, Roger Land Building, Alexander Crum Brown Road, King's Buildings, Edinburgh EH9 3FF, U.K.
ACS Synthetic Biology
|May 29, 2026
Summary
Engineered Escherichia coli cells efficiently adhere to plastic surfaces using curli and antigen 43 (Ag43) for enhanced plastic biodegradation. This approach significantly increases the release of terephthalic acid from PET, aiding plastic bioremediation.
Area of Science:
- Biotechnology
- Microbial Engineering
- Environmental Science
Background:
- Microbial biofilms on plastics are underexplored for biodegradation applications.
- Efficient adhesion of microbes to plastic surfaces is crucial for bioremediation.
Purpose of the Study:
- To engineer Escherichia coli for efficient adhesion to plastic surfaces.
- To develop a system for concurrent enzyme secretion for plastic degradation.
Main Methods:
- Overexpression of curli and antigen 43 (Ag43) in Escherichia coli for enhanced cell adhesion to plastics.
- Inducible adhesion of engineered E. coli to polyethylene terephthalate (PET).
- Co-overexpression of PET depolymerase PHL7 with adhesion factors.
Main Results:
- Curli and Ag43 significantly enhanced E. coli adhesion to various plastic surfaces.
- Ag43 mediated more uniform cell adhesion compared to curli.
- Co-overexpression of curli and PHL7 led to a 5.6-fold increase in terephthalic acid release from PET.
Conclusions:
- Engineered E. coli adhesion provides a versatile platform for plastic bioremediation.
- This method enables inducible adhesion and concurrent secretion of degradative enzymes.
- The approach is broadly applicable to plastic bioremediation technologies.
Related Concept Videos
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:28Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
01:29Biofilms
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
01:30Bacterial Signaling
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
01:26Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
01:28Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...