The Epstein-Barr virus Pol catalytic subunit physically interacts with the BBLF4-BSLF1-BBLF2/3 complex

Ken Fujii, Naoaki Yokoyama, Tohru Kiyono, Kiyotaka Kuzushima, Michio Homma, Yukihiro Nishiyama, Masatoshi Fujita, Tatsuya Tsurumi

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Abstract

The Epstein-Barr virus (EBV)-encoded replication proteins that account for the basic reactions at the replication fork are thought to be the EBV Pol holoenzyme, consisting of the BALF5 Pol catalytic and the BMRF1 Pol accessory subunits, the putative helicase-primase complex, comprising the BBLF4, BSLF1, and BBLF2/3 proteins, and the BALF2 single-stranded DNA-binding protein. Immunoprecipitation analyses using anti-BSLF1 or anti-BBLF2/3 protein- specific antibody with clarified lysates of B95-8 cells in a viral productive cycle suggested that the EBV Pol holoenzyme physically interacts with the BBLF4-BSLF1-BBLF2/3 complex to form a large complex. Although the complex was stable in 500 mM NaCl and 1% NP-40, the BALF5 protein became dissociated in the presence of 0.1% sodium dodecyl sulfate. Experiments using lysates from insect cells superinfected with combinations of recombinant baculoviruses capable of expressing each of viral replication proteins showed that not the BMRF1 Pol accessory subunit but rather the BALF5 Pol catalytic subunit directly interacts with the BBLF4-BSLF1-BBLF2/3 complex. Furthermore, double infection with pairs of recombinant viruses revealed that each component of the BBLF4-BSLF1-BBLF2/3 complex makes contact with the BALF5 Pol catalytic subunit. The interactions of the EBV DNA polymerase with the EBV putative helicase-primase complex warrant particular attention because they are thought to coordinate leading- and lagging-strand DNA synthesis at the replication fork.

Original languageEnglish
Pages (from-to)2550-2557
Number of pages8
JournalJournal of virology
Volume74
Issue number6
DOIs
Publication statusPublished - Mar 8 2000

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Human herpesvirus 4
protein subunits
Human Herpesvirus 4
Catalytic Domain
DNA Primase
Holoenzymes
Proteins
proteins
Baculoviridae
DNA-Binding Proteins
Viral Proteins
Virus Replication
Immunoprecipitation
single-stranded DNA
Sodium Dodecyl Sulfate
DNA-binding proteins
Insects
DNA-directed DNA polymerase
sodium dodecyl sulfate
virus replication

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

Cite this

Fujii, K., Yokoyama, N., Kiyono, T., Kuzushima, K., Homma, M., Nishiyama, Y., ... Tsurumi, T. (2000). The Epstein-Barr virus Pol catalytic subunit physically interacts with the BBLF4-BSLF1-BBLF2/3 complex. Journal of virology, 74(6), 2550-2557. https://doi.org/10.1128/JVI.74.6.2550-2557.2000

The Epstein-Barr virus Pol catalytic subunit physically interacts with the BBLF4-BSLF1-BBLF2/3 complex. / Fujii, Ken; Yokoyama, Naoaki; Kiyono, Tohru; Kuzushima, Kiyotaka; Homma, Michio; Nishiyama, Yukihiro; Fujita, Masatoshi; Tsurumi, Tatsuya.

In: Journal of virology, Vol. 74, No. 6, 08.03.2000, p. 2550-2557.

Research output: Contribution to journalArticle

Fujii, K, Yokoyama, N, Kiyono, T, Kuzushima, K, Homma, M, Nishiyama, Y, Fujita, M & Tsurumi, T 2000, 'The Epstein-Barr virus Pol catalytic subunit physically interacts with the BBLF4-BSLF1-BBLF2/3 complex', Journal of virology, vol. 74, no. 6, pp. 2550-2557. https://doi.org/10.1128/JVI.74.6.2550-2557.2000
Fujii, Ken ; Yokoyama, Naoaki ; Kiyono, Tohru ; Kuzushima, Kiyotaka ; Homma, Michio ; Nishiyama, Yukihiro ; Fujita, Masatoshi ; Tsurumi, Tatsuya. / The Epstein-Barr virus Pol catalytic subunit physically interacts with the BBLF4-BSLF1-BBLF2/3 complex. In: Journal of virology. 2000 ; Vol. 74, No. 6. pp. 2550-2557.
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