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Updated: Aug 28, 2025

Profiling Ubiquitin and Ubiquitin-like Dependent Post-translational Modifications and Identification of Significant Alterations
Published on: November 7, 2019
SQuAPP-simple quantitative analysis of proteins and PTMs.
Enes K Ergin1,2, Anuli C Uzozie1,2, Siyuan Chen1,2
1Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T 1Z7, Canada.
Scientists can now easily analyze complex proteomics data, including post-translational modifications (PTMs), using SQuAPP. This R-Shiny tool simplifies quantitative proteomics analysis for both experts and novices, enabling better biological insights.
Area of Science:
- Proteomics
- Biomedical Research
- Bioinformatics
Background:
- Proteomics and post-translational modification (PTM) analysis are crucial in biological and biomedical studies.
- Existing software for quantitative proteomics is often complex, posing challenges for non-expert scientists.
- Integrating multi-level proteomics data, including various PTMs, remains a significant hurdle for biologists.
Purpose of the Study:
- To develop an accessible R-Shiny web-based pipeline for quantitative proteomics data analysis.
- To provide a streamlined workflow for quality control, data pre-processing, statistical analysis, and visualization.
- To facilitate the integrative analysis of protein, peptide, and PTM datasets for enhanced biological interpretation.
Main Methods:
- Development of SQuAPP, an R-Shiny web application.
- Implementation of a guided workflow for users of varying expertise levels.
- Parallel processing and quantitative integration of protein, peptide, and PTM datasets.
Main Results:
- SQuAPP enables rapid identification of protein modification changes independent of protein-level modulation.
- The pipeline allows for intuitive interpretation of dynamic dependencies between different protein modifications.
- Provides a user-friendly interface for comprehensive quantitative proteomics analysis.
Conclusions:
- SQuAPP addresses the need for accessible and integrated proteomics data analysis tools.
- The pipeline empowers biologists to conduct sophisticated analyses of protein and PTM data.
- Facilitates deeper understanding of biological processes through quantitative proteomics insights.
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