alexa CrossTope: How This Database Can Impact New Vaccine Strategies Development
ISSN: 2161-0517

Virology & Mycology
Open Access

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9th International Virology Congress and Expo
March 13-14, 2017 London, UK

Gustavo Fioravanti Vieira
Federal University of Rio Grande do Sul, Brazil
Posters & Accepted Abstracts: Virol Mycol
DOI: 10.4172/2161-0517.C1.018
One of the greatest challenges in immunology is the discovery of appropriate targets for vaccine development. The choice relies on the identification of elements responsible for the stimulation of immune responses, such as the analysis of peptide loaded MHC-I molecules (pMHC). These features could define the physicochemical and structural fingerprints shared by pathogens. Focusing on this idea, our group developed the CrossTope Data Bank, a curated repository of 3D structures of pMHC-I complexes. The structures hosted by the CrossTope were obtained from either (i) modeling of MHC-I containing immunogenic epitopes through Docktope (tool developed by our group, hosted in CrossTope) or (ii) retrieving pMHC-I crystals from Protein Data Bank. At this moment, CrossTope contains nearly 460 non-redundant pMHC-I complexes. In the database query, the user can download either the structures or the topographical/charges images of the pMHC-I surface. These files can be used to cluster similar complexes, which could be applied to develop wide spectrum vaccines, or to identify viral and tumor mutations that can impact in the T cell structural recognition. The rational involves the analysis of electrostatic potential and accessible surface area from the TCR-interacting surface of these pMHC complexes, performing a Hierarchical Cluster Analysis (HCA). We were able to reproduce cross-reactivity networks, previously described in vitro, among different viral targets like HCV, PV, VV, IV, HIV, etc. Our ultimate goal is to provide a platform that allows scientists from all over the world to perform the prospection of new immunogenic targets, envisaging a new generation of vaccines and immunotherapies.


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