Epitopedia

Epitopedia identifies regions of three-dimensional molecular mimicry between antigenic pathogen proteins and known immune epitopes to assess potential cross-reactive antibody responses and inform immunological studies.

Key Features:

• Molecular mimicry identification: Detects potential three-dimensional molecular mimicry between pathogen proteins and immune epitopes catalogued in the Immune Epitope Database (IEDB).
• IEDB integration: Integrates epitope data from the Immune Epitope Database (IEDB) to compare antigenic pathogen proteins against known immune epitopes.
• Secondary structure analysis: Analyzes secondary structure states and their impact on root-mean-square deviation (RMSD), reporting that pentapeptide pairs in helical conformations exhibit lower RMSD than those in extended or coil conformations.
• Sequence identity evaluation: Assesses identity between pentapeptide pairs and their parent sequences and relates increased RMSD to non-homologous sequence origins.

Scientific Applications:

• Host immune response characterization: Identifies structurally similar epitope regions to aid interpretation of antibody cross-reactivity and immune response mechanisms.
• Cross-reactivity prediction: Assesses structural and sequence features to predict potential cross-reactive antibody recognition between pathogen and known epitopes.
• Vaccine and therapeutic design: Provides structural mimicry insights that can inform selection of antigenic regions for vaccine and therapeutic development.
• Experimental design guidance: Guides experimental prioritization by highlighting pentapeptide regions with notable RMSD and sequence identity characteristics.

Methodology:

Integrates IEDB epitope data and compares antigenic pathogen proteins to known immune epitopes by evaluating pentapeptide pairs, analyzing secondary structure states, assessing sequence identity between pentapeptides and parent sequences, and calculating RMSD values.