Related Experiment Video
Updated: Mar 25, 2026
06:01
Extracellular Protein Microarray Technology for High Throughput Detection of Low Affinity Receptor-Ligand Interactions
Published on: January 7, 2019
7.8K
Fabrication of a reversible protein array directly from cell lysate using a stimuli-responsive polypeptide
Nidhi Nath1, Ashutosh Chilkoti
1Department of Biomedical Engineering, Duke University, Box 90281, Durham, North Carolina 27708, USA.
Analytical Chemistry
|March 8, 2003
Summary
Researchers developed a new method to reversibly immobilize functional proteins from cell lysate onto surfaces. This technique uses a stimuli-responsive elastin-like polypeptide (ELP) and a lower critical solution temperature (LCST) transition for controlled protein capture and release.
Area of Science:
- Biotechnology
- Materials Science
- Surface Chemistry
Background:
- Protein immobilization is crucial for biosensors and arrays.
- Current methods often require protein purification and can affect protein activity.
- Stimuli-responsive polymers offer tunable surface properties.
Purpose of the Study:
- To develop a novel method for reversible, functional protein immobilization directly from cell lysate.
- To utilize elastin-like polypeptides (ELPs) and their lower critical solution temperature (LCST) transition for protein capture.
- To enable protein presentation in an active orientation for downstream applications.
Main Methods:
- Covalent micropatterning of recombinant elastin-like polypeptide (ELP) on a glass surface.
- Incubation with E. coli lysate containing an ELP-fusion protein.
- Triggering the LCST transition of both surface-bound and soluble ELP via an external stimulus.
- Utilizing hydrophobic interactions for protein capture and release.
Main Results:
- Successful reversible binding of ELP-fusion proteins from cell lysate onto ELP-functionalized surfaces.
- Captured proteins maintained functional orientation for target binding.
- Demonstrated reversibility of the binding process by reversing the LCST transition.
- Eliminated the need for intermediate protein purification steps.
Conclusions:
- The developed Thermally Responsive Affinity Polypeptide (TRAP) system enables direct, reversible, and functional protein immobilization from crude lysates.
- This technology is applicable to lab-on-a-chip devices and the fabrication of protein/peptide arrays.
- TRAP offers a versatile platform for controlled protein presentation at solid-water interfaces.
