Team:Illinois/Project

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Revision as of 01:39, 28 October 2008

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Project Abstract

The unifying motivation behind our research this year is the creation of novel diagnostic tools for medicine. To this end, we are conducting three parallel research projects to create cell-based biosensors. We are currently engineering a bimolecular fluorescence system in which two halves of a fluorescent protein, each fused to an antigenic epitope, will bind to the two sites on an antibody in human serum to cause a detectable fluorescent signal when antibodies against this specific antigen are present. These proteins can be produced in bulk through a bacterial expression system. We are also pursuing similar diagnostic objectives using a eukaryotic system; we are designing strains of yeast able to respond specifically to immunogenic epitopes or antibodies, and activate a fluorometric or enzymatic response accordingly. We are fusing antibodies against immunological targets to cell surface receptors of transcriptional signaling pathways, which would become activated only in the presence of these pathogens.

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Subprojects

Antibody GPCR Fusion

This team will attempt pathogen detection by fusing the appropriate antibody domain to a GPCR receptor and upon binding of the target protein (i.e. cholera toxin), linking the resulting signal cascade to transcription of a reporter, GFP or LacZ.

Antibody Receptor Tyrosine Kinase Fusion

In this project our plan is to fuse a single-chain antibody to a receptor tyrosine kinase so that the receptor will activate in the presence of cholera toxin. The antibody is specific for the B subunit of the cholera toxin and will cause the receptors to dimerize and activate a signal transduction pathway.

Bimolecular Fluorescence Biosensor

A soluble biosensor that activates a fluorescent protein upon binding a specific biomolecule