PepCoGen

PepCoGen generates all possible peptide sequence variants by substituting amino acids at specified positions based on physicochemical property similarities to support design and analysis of peptides for research, diagnostics, and discovery.

Key Features:

• Comprehensive combination generation: Systematically generates every possible peptide combination by substituting amino acids at specified positions with others that share similar physicochemical characteristics.
• Physicochemical property prediction: Calculates molecular weight, net charge, solubility, hydrophobicity (including hydrophobic plots), and isoelectric point for each peptide variant.
• Three-dimensional structural modeling: Produces random three-dimensional models for each peptide combination to visualize structural variation resulting from substitutions.

Scientific Applications:

• Peptide design for research and diagnostics: Enables exploration of sequence variants to obtain peptides with tailored physicochemical profiles for use as reagents.
• Variant screening for activity and stability: Supports identification of sequences with desired biological activity or stability characteristics through systematic combinatorial generation and property prediction.
• Drug discovery and probe development: Assists evaluation of peptide candidates as therapeutic agents or molecular probes by providing variant sets and structural models.

Methodology:

An algorithm systematically varies amino acids within input peptide sequences by grouping substitutions according to physicochemical similarity; for each generated variant the tool computes molecular weight, net charge, solubility, hydrophobicity (with hydrophobic plots), isoelectric point, and generates random three-dimensional models.