Drug Target Identification Using an iTRAQ-Based Quantitative Chemical Proteomics Approach-Based on a Target Profiling...

Area of Science:

• Chemical Biology
• Proteomics
• Drug Discovery

Background:

• Understanding drug mechanisms requires identifying cellular binding targets.
• Chemical proteomics offers tools to study small molecule-protein interactions.
• Existing methods may lack precision in target identification.

Purpose of the Study:

• To develop and present a quantitative chemical proteomics protocol.
• To identify specific cellular binding targets of drugs and natural products.
• To enable a deeper understanding of molecular mechanisms of action.

Main Methods:

• Synthesized modified drug probes with click chemistry additions.
• Utilized bioorthogonal click chemistry for probe ligation to biotin.
• Employed isobaric tags for relative and absolute quantification (iTRAQ) and LC-MS/MS for analysis.

Main Results:

• Successfully identified specific binding targets for various drugs and natural products.
• Differentiated specific targets from non-specific binding proteins.
• Demonstrated the protocol's efficacy in profiling known bioactive molecules.

Conclusions:

• The developed protocol is a powerful tool for profiling bioactive small molecules.
• It facilitates the understanding of drug mechanisms and off-target effects.
• This method advances chemical proteomics for drug discovery and development.