National Institute of Allergy and Infectious Diseases
Welcome to the Exon distribution server for NIAID bioinformatics tools
a service of the Bioinformatics and Computational Biosciences Branch  
  • Home
  • Applications
  • Data Portals
  • Support
  • About
  • Useful Links
at the Office of Cyber Infrastructure and Computational Biology  
Screenshot of the HASP Viewer tab with two molecules selected
Figure explaining the features and interface of the HASP application Screenshot of the HASP map search Screenshot of the HASP Viewer tab with molecule selected
( Click the thumbnails to see
full-sized screen shots. )

Start Now Start Now

This software is provided free of charge by the National Institute of Allergy & Infectious Diseases.


Hemagglutinin Structure Prediction Server


The Hemagglutinin Structure Prediction (HASP) server was designed as a scientific tool for researchers to visualize their phylogenetic, biochemical, and immunological HA data in the three-dimensional context of the HA structure, in the hopes that the context may help researchers better interpret their data and generate new hypotheses. HASP provides high-quality homology models built using Rosetta for all publicly available hemagglutinin (HA) protein sequences. HASP presents the models in such a way that researchers can gain scientific insights directly through the application and can easily retrieve the structures for more intensive offline studies and analysis.

The web interface for HASP was developed using GWT. The gene information was extracted from NCBI GenBank annotations, and the proteins were modeled using Rosetta. The HASP framework can be easily adapted for displaying any protein structure data. We welcome your ideas for improvement and feedback; please contact us through the Support page.


  • Interactive map based location search for searching by geographical region
  • Select up to two models to be displayed directly in a built-in molecular viewer
  • Interactive alignment to easily identify residues in the model
  • Export the sequences in FASTA or the models in PDB format for further analysis


  • HASP Server: A database and structural visualization platform for comparative models of influenza hemagglutinin proteins.
    Xavier I. Ambroggio, Jennifer Dommer, Vivek Gopalan, Eleca J. Dunham, Jeffery K. Taubenberger, Darrell Hurt

Home | Site Map | Accessibility | Privacy Policy | Disclaimer | Links & Policies | FOIA | Contact