PMID- 16189006 OWN - NLM STAT- MEDLINE DCOM- 20051108 LR - 20240412 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 79 IP - 20 DP - 2005 Oct TI - Human herpesvirus 6 open reading frame U14 protein and cellular p53 interact with each other and are contained in the virion. PG - 13037-46 AB - A mass spectroscopic analysis of proteins from human herpesvirus 6 (HHV-6)-infected cells showed that the HHV-6 U14 protein coimmunoprecipitated with the tumor suppressor p53. The binding of U14 to p53 was verified by coimmunoprecipitation experiments in both Molt-3 cells infected with HHV-6 and 293 cells cotransfected with U14 and p53 expression vectors. Indirect immunofluorescence assays (IFAs) showed that by 18 h postinfection (hpi) U14 localized to the dot-like structures observed in both the nucleus and cytoplasm where p53 was partly accumulated. Despite Northern blotting evidence that U14 follows late kinetics, the U14 protein was detected immediately after infection (at 3 hpi) by IFA. In addition, by Western blotting, U14 was detected at 0 hpi or in the presence of cycloheximide which completely abolished the expression of IE1 protein. In addition to U14, p53 was detected at 0 hpi although it was not detected in mock-infected cells. Furthermore, both U14 and p53 were clearly detected in the viral particles by Western blotting and immunoelectron microscopy, supporting the idea that U14 and p53 are incorporated into virions. Our study provides the first evidence of the incorporation of cellular p53 into viral particles and suggests that p53 may play an important role in viral infection. FAU - Takemoto, Masaya AU - Takemoto M AD - Department of Microbiology, Osaka University Graduate School of Medicine C1, Japan. FAU - Koike, Masato AU - Koike M FAU - Mori, Yasuko AU - Mori Y FAU - Yonemoto, Sayoko AU - Yonemoto S FAU - Sasamoto, Yumi AU - Sasamoto Y FAU - Kondo, Kazuhiro AU - Kondo K FAU - Uchiyama, Yasuo AU - Uchiyama Y FAU - Yamanishi, Koichi AU - Yamanishi K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Tumor Suppressor Protein p53) RN - 0 (Viral Structural Proteins) SB - IM MH - Blotting, Northern MH - Blotting, Western MH - Cell Line MH - Cell Nucleus/metabolism MH - Cytoplasm/metabolism MH - Herpesvirus 6, Human/chemistry/*metabolism MH - Humans MH - Immunohistochemistry MH - Kinetics MH - Microscopy, Immunoelectron MH - Molecular Weight MH - Open Reading Frames MH - Protein Binding MH - Tumor Suppressor Protein p53/*metabolism MH - Viral Structural Proteins/*metabolism MH - Virion/chemistry/*metabolism PMC - PMC1235810 EDAT- 2005/09/29 09:00 MHDA- 2005/11/09 09:00 PMCR- 2005/10/01 CRDT- 2005/09/29 09:00 PHST- 2005/09/29 09:00 [pubmed] PHST- 2005/11/09 09:00 [medline] PHST- 2005/09/29 09:00 [entrez] PHST- 2005/10/01 00:00 [pmc-release] AID - 79/20/13037 [pii] AID - 0032-05 [pii] AID - 10.1128/JVI.79.20.13037-13046.2005 [doi] PST - ppublish SO - J Virol. 2005 Oct;79(20):13037-46. doi: 10.1128/JVI.79.20.13037-13046.2005.