ProPAS

ProPAS computes physicochemical properties of proteins and peptides to support their separation, identification, and analysis in proteomics.

Key Features:

• Physicochemical parameter calculation: Computes isoelectric point (pI), hydrophobicity (Hy), and mass weight (MW) for protein and peptide sequences.
• Amino acid composition analysis: Calculates detailed amino acid composition for all input sequences.
• Statistical results and distributions: Generates statistical summaries and number distributions along parameter values and exports results for external charting (e.g., Excel).
• Local computation and large-scale dataset support: Performs calculations locally on personal computers to enable analysis of large datasets.

Scientific Applications:

• Proteomic experiment design: Informs selection of separation and identification strategies based on computed physicochemical properties.
• Protein and peptide analysis: Characterizes identified proteins and peptides by physicochemical parameters and amino acid composition.
• High-throughput proteomics: Supports analysis of large-scale proteomic datasets through local computation of properties and distributions.
• Interpretation of protein behavior: Aids assessment of protein behavior and interactions within biological systems using computed properties.

Methodology:

Performs sequence-based calculations of isoelectric point (pI), hydrophobicity (Hy), mass weight (MW) and amino acid composition locally and generates statistical distributions for export.