| Literature DB >> 14581575 |
Bunji Sato1, Marvin Sommer, Hideki Ito, Ann M Arvin.
Abstract
Varicella-zoster virus (VZV) is an alphaherpesvirus that causes two diseases, chickenpox and zoster. VZV open reading frame 4 (ORF4) encodes the immediate-early 4 (IE4) protein, which is conserved among alphaherpesvirus and has transactivation activity in transient transfections. To determine whether the ORF4 gene product is essential for viral replication, we used VZV cosmids to remove ORF4 from the VZV genome. Deleting ORF4 was incompatible with recovery of infectious virus, whereas transfections done by using repaired cosmids with ORF4 inserted at a nonnative site yielded virus. To analyze the functional domain of IE4, we introduced a mutation altering the C-terminal amino acids, KYFKC (K443S), which was designed to disrupt the dimerization of IE4 protein. Transfections with these mutant cosmids yielded no virus, indicating that this KYFKC motif was essential for IE4 function.Entities:
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Year: 2003 PMID: 14581575 PMCID: PMC254250 DOI: 10.1128/jvi.77.22.12369-12372.2003
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103