Thermostability of landscape phage probes

Area of Science:

• Biotechnology
• Environmental Science
• Molecular Biology

Background:

• Traditional immunoassays utilize antibodies, which are often unstable in extreme environmental conditions.
• Environmental monitoring demands thermostable diagnostic probes capable of functioning outside controlled laboratory settings.

Purpose of the Study:

• To evaluate the thermostability of landscape phage probes in comparison to monoclonal antibodies.
• To determine the suitability of landscape phage as robust probes for environmental monitoring applications.

Main Methods:

• A landscape phage probe and a monoclonal antibody were tested in parallel using an enzyme-linked immunosorbent assay (ELISA) format.
• Thermostability was assessed by exposing both probes to elevated temperatures over time.
• The activation energy of phage degradation was calculated to quantify its thermal stability.

Main Results:

• Both phage probes and antibodies were stable at room temperature for over six months.
• At elevated temperatures, the antibody degraded significantly faster than the landscape phage probe.
• Phage probes retained detectable binding activity for over six weeks at 63°C and three days at 76°C.

Conclusions:

• Landscape phage probes exhibit high thermostability, outperforming traditional antibody probes under thermal stress.
• Phage probes are suitable for applications involving high-temperature shipping, storage, and operation in environmental monitoring.
• The superior stability of phage probes offers a reliable alternative for diagnostics in non-controlled conditions.