A PY-nuclear localization signal is required for nuclear accumulation of HCMV UL79 protein

Lin Wang, Meili Li, Mingsheng Cai, Junji Xing, Shuai Wang, Chunfu Zheng

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Human cytomegalovirus UL79 protein is recently reported to be required for transcription or efficient accumulation of late viral mRNAs during viral infection. An absolute nuclear distribution of UL79 proteins has been observed with immunofluorescence assay, both during the infection of Flag-tagged UL79 recombinant virus and in the HFFs expressing HA-tagged UL79, with or without virus infection. However, little is known about the nuclear import mechanism of UL79 protein. Here, by utilizing living cells fluorescent microscopy, a predominant nuclear localization of UL79 protein in living cells was detected. Furthermore, the nuclear import of UL79 protein was demonstrated to be dependent on the transportin-1-mediated pathway. Finally, a hydrophobic PY-nuclear localization signal (PY-NLS) was delineated between the amino acids 66-92 of UL79 protein. Collectively, we provide evidence that a PY-NLS, firstly described in viral proteins, is responsible for the nuclear accumulation of UL79 protein.

Original languageEnglish (US)
Pages (from-to)381-387
Number of pages7
JournalMedical Microbiology and Immunology
Issue number3
StatePublished - Aug 2012


  • Human cytomegalovirus (HCMV)
  • PY-nuclear localization signal (PY-NLS)
  • Subcellular localization
  • UL79 protein

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Microbiology (medical)


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