The Omnitrap Platform: A Versatile Segmented Linear Ion Trap for Multidimensional Multiple-Stage Tandem Mass...

Area of Science:

• Analytical Chemistry
• Mass Spectrometry
• Biochemistry

Background:

• Tandem mass spectrometry (MSn) is crucial for protein characterization.
• Current platforms often lack flexibility in ion activation and multi-stage processing.
• Integrating diverse activation methods into a single system is challenging.

Purpose of the Study:

• To introduce and characterize a novel segmented linear ion trap, the Omnitrap platform.
• To demonstrate multidimensional, multiple-stage ion processing capabilities.
• To showcase advanced protein characterization using integrated ion activation methods.

Main Methods:

• Development of a segmented linear ion trap (Omnitrap platform) with axial segmentation.
• Incorporation of diverse ion activation methods: reagent ions, radical neutrals, photons, electrons, and collisions.
• Experimental investigation of ion motion, stability diagrams, secular frequencies, and isolation techniques.
• Performance evaluation using fragmentation of partially unfolded ubiquitin and MS3 experiments.

Main Results:

• The Omnitrap platform successfully demonstrated multidimensional, multiple-stage ion processing.
• Integrated ion activation methods provided complete sequence coverage for ubiquitin.
• High-efficiency MS3 experiments yielded information-rich spectra comparable to MS2.
• Successful integration with Orbitrap and time-of-flight mass analyzers was achieved.

Conclusions:

• The Omnitrap platform offers a flexible, single-platform solution for advanced ion processing.
• It enables in-depth top-down MSn characterization of proteins with enhanced performance.
• This novel trap significantly advances capabilities in complex molecule analysis via mass spectrometry.