Journal of Microbiology

Research Support, Non-U.S. Gov't

cDNA Cloning of Korean Human Norovirus and Nucleotidylylation of VPg by Norovirus RNA-Dependent RNA Polymerase: Byung Sup Min , Kang Rok Han , Jung Ihn Lee , Jai Myung Yang; J. Microbiol. 2012;50(4):625-630. Published online August 25, 2012; DOI: https://doi.org/10.1007/s12275-012-2087-4

Abstract: Norovirus, a member of the Caliciviridae family, is a major causative agent of gastroenteritis worldwide. The cDNA of the entire genome of human norovirus (HuNV) was cloned using the RNA extracted from the stool sample of a Korean patient. The RNA genome consists of 7,559 nucleotides, carries 3 open reading frames (ORFs), 5' and 3' noncoding regions, and a poly(A) tail at the 3' end. Phylogenic analysis of the nucleotide sequence indicated that it belongs to GII.4, the most dominant genogroup. To analyze RNA synthesis and nucleotidylylation of VPg by RNA-dependent RNA polymerase (RdRp), recombinant RdRp and VPg were expressed in Escherichia coli as His-tagged forms. The HuNV RdRp exhibited template and divalent cation-dependent RNA synthesis in vitro. The HuNV RdRp nucleotidylylated HuNV VPg but not murine norovirus (MNV) VPg, whereas MNV RdRp nucleotidylylated both MNV and HuNV VPg more efficiently than HuNV RdRp.

Search