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SPECTRUM - A MATLAB Toolbox for Proteoform Identification from Top-Down Proteomics Data.

Abdul Rehman Basharat1, Kanzal Iman1, Muhammad Farhan Khalid1

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Summary
This summary is machine-generated.

Top-Down Proteomics (TDP) analysis is challenging due to complex spectra. The new SPECTRUM toolbox significantly enhances protein identification and PTM characterization in TDP data.

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Area of Science:

  • Proteomics
  • Mass Spectrometry
  • Biochemistry

Background:

  • Top-Down Proteomics (TDP) enables intact protein analysis, offering advantages in mass accuracy, sequence coverage, and post-translational modification (PTM) identification.
  • The complexity of TDP spectra and limited software tools hinder efficient protein search and PTM characterization.

Purpose of the Study:

  • To develop an open-source software toolbox, SPECTRUM, for comprehensive Top-Down Proteomics data analysis.
  • To address the limitations in current TDP software for protein identification and PTM analysis.

Main Methods:

  • Development of an open-architecture, open-source toolbox (SPECTRUM) in MATLAB.
  • Implementation of features including MS2-based mass tuning, de novo peptide sequencing, PTM characterization and search, spectral comparison, and multifactorial scoring.
  • Validation using published datasets and benchmarking against existing TDP tools.

Main Results:

  • SPECTRUM demonstrated significantly enhanced protein identification rates, ranging from 91% to 177% improvement over contemporary tools.
  • The toolbox provides intuitive graphical user interfaces for data analysis and result visualization.
  • Successful validation and benchmarking confirm SPECTRUM's efficacy in TDP data analysis.

Conclusions:

  • SPECTRUM is a powerful, open-source toolbox that overcomes key challenges in Top-Down Proteomics data analysis.
  • The software significantly improves protein identification and PTM characterization, advancing the field of proteomics.
  • SPECTRUM is freely available, promoting wider adoption and further development in the scientific community.