Unipept

Unipept provides peptide-centric metaproteomics analysis for taxonomic and functional interpretation of tryptic peptides derived from mass spectrometry data.

Key Features:

• Web-Based Application: Provides visualizations for metaproteomics data and processes protein identification results derived from mass spectrometry experiments.
• Open Source and Web Services: Distributed under the MIT license and, since version 2.4, exposes web services for programmatic access at http://api.unipept.ugent.be.
• Efficient Data Retrieval: Uses a fast index built from UniProtKB and the NCBI taxonomy to retrieve UniProt entries that contain specific tryptic peptides.
• Desktop Application - Unipept Desktop: Offers a desktop implementation that increases capacity and throughput for larger metaproteomics datasets.
• Comparative Analysis Pipeline: Includes a pipeline for comparative analyses across experimental conditions or samples.
• Project Organization: Organizes experimental data into projects to support data management for metaproteomics studies.

Scientific Applications:

• Metaproteomics of microbial communities: Taxonomic and functional profiling of microbial community proteomes from mass spectrometry-derived peptides.
• Protein identification analysis: Mapping tryptic peptides to UniProt entries to interpret protein-level evidence from MS experiments.
• Environmental and microbial ecology studies: Comparative proteomic analyses to investigate microbial composition and function in environmental samples.

Methodology:

Computational methods include indexing UniProtKB with the NCBI taxonomy to enable retrieval of UniProt entries containing specific tryptic peptides and providing programmatic access via web services (API introduced in version 2.4); Unipept Desktop implements a comparative analysis pipeline and project-based data organization.