MetaUniDec: High-Throughput Deconvolution of Native Mass Spectra

Area of Science:

• Biochemistry
• Analytical Chemistry
• Computational Biology

Background:

• Native mass spectrometry (MS) is increasingly used in academia and industry, creating a need for efficient analysis of large datasets.
• Current software struggles with high-throughput deconvolution of native electrospray mass spectra from intact proteins and complexes.
• The UniDec algorithm offers speed and robustness but was limited to individual spectra analysis.

Purpose of the Study:

• To optimize the UniDec algorithm for high-throughput deconvolution, analysis, and visualization of large native MS datasets.
• To develop a new module, MetaUniDec, centered around a hierarchical data format 5 (HDF5) for improved data handling.
• To enhance the speed, portability, and analytical capabilities for complex protein and lipoprotein analyses.

Main Methods:

• Developed MetaUniDec, a module integrating UniDec with an HDF5 data format for large dataset management.
• Implemented code optimizations and a new graphical user interface for enhanced visualization and interaction.
• Applied MetaUniDec to analyze automated collision voltage ramps on bacterial heme-nitric oxide/oxygen binding (H-NOX) protein and lipoprotein nanodiscs.

Main Results:

• MetaUniDec demonstrated significant improvements in speed, portability, and file size for large native MS datasets.
• Analysis revealed discrete heme loss from H-NOX protein and continuous lipid/charge loss from nanodiscs upon collisional activation.
• The software enabled exploration of energetic profiles of collisional activation in ultra-high mass range Orbitrap mass spectrometry.

Conclusions:

• MetaUniDec provides a robust and efficient solution for high-throughput analysis of large native MS datasets.
• The HDF5-centered approach and optimized algorithms significantly advance the capabilities for studying protein complexes.
• MetaUniDec facilitates detailed energetic profiling of biomolecular dissociation pathways in advanced mass spectrometry.