Abstract
On the basis of the secondary structure calculations from the known amino acid sequence we came to the conclusion that hepatitis A virus capsid proteins have the typical antiparallel beta-sheet bilayer structure. The predicted secondary structure of the HAV proteins can be well aligned with those of the poliovirus (type 1 Mahoney) and human rhinovirus (type 14). It enabled us to use the X-ray structure of the PV-1M and HRV-14 proteins as a template and then, firstly, to localize the positions of alpha and beta regions in the architecture of the HAV protein molecules and, secondly, to discover the amino acid homologies of the secondary structure regions aligned. The obtained model of the three-dimensional structure for HAV proteins helped us to indicate the exposed regions of the polypeptide chains and to pinpoint the potential neutralizing antigenic sites.
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