Abstract
Background:Non-structural protein 4 (NSP4) is a critical protein for rotavirus (RV) replication and assembly. This protein has multiple domains and motifs that predispose its function and activity. NSP4 has a sequence divergence in human and animal RVs. Recently, 14 genotypes (E1-E14) of NSP4 have been identified, and E1 and E2 have been shown to be the most common genotypes in human.Methods:The gene and protein sequence of NSP4 in RV-positive samples were inspected with the aim of NSP4 genotyping and variation analysis in viroporin and other domains. P and G typings of RV samples were carried out by WHO primers using a semi-multiplex PCR method. Non-typeable RV samples were amplified by conserved primers and sequenced.Results:In viroporin and enterotoxin, conserved sequence was detected, and amino acids substitution with the same biochemical properties was found.Conclusion:Association of NSP4 genotype with P or G genotyping G1/G9 correlates with E1 genogroups. In electrophoretyping of RV, E2 genotype had a short pattern when compared to E1.
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