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A hexylchloride-based catch-and-release system for chemical proteomic applications
Jennifer L Brigham1, B Gayani K Perera, Dustin J Maly
1Department of Chemistry, University of Washington, Seattle, WA 98195, USA.
ACS Chemical Biology
|January 12, 2013
Summary
Researchers developed a new bioorthogonal catch-and-release method using a hexylchloride tag and HaloTag protein. This technique efficiently enriches tagged proteins and small molecules, enabling new proteomic profiling strategies.
Area of Science:
- Chemical Biology
- Proteomics
- Molecular Biology
Background:
- Bioorthogonal ligation is crucial for chemical proteomics, enabling selective conjugation of probes to biomolecules.
- Existing methods often require specific chemical handles for labeling proteins and small molecules.
Purpose of the Study:
- To introduce a novel catch-and-release enrichment strategy utilizing a bioorthogonal hexylchloride chemical handle.
- To demonstrate the efficient capture and mild elution of tagged proteins and small molecules using HaloTag technology.
Main Methods:
- Proteins and small molecules were tagged with a hexylchloride group.
- Immobilized HaloTag protein was used for capturing hexylchloride-tagged entities.
- A HaloTag fusion protein with a protease cleavage site facilitated selective elution.
Main Results:
- The hexylchloride-based system efficiently captured tagged proteins and small molecules.
- Proteins were selectively eluted under mild conditions using the protease cleavage site.
- The strategy successfully enriched protein kinases bound to ATP-binding site probes from cell lysates.
Conclusions:
- The hexylchloride-based catch-and-release system offers a versatile tool for bioorthogonal enrichment.
- This method expands possibilities for profiling enzyme families and identifying cellular targets of small molecules.
