Functional domains of ZFP809 essential for nuclear localization and gene silencing

Yu Ichida, Yuko Utsunomiya, Toru Yasuda, Kazuhiko Nakabayashi, Toshinori Sato, Masafumi Onodera

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Zinc finger protein 809 (ZFP809) is a member of the Kruppel-associated box-containing zinc finger protein (KRAB-ZFP) family, and is highly expressed in mouse immature cells. ZFP809 is known to inhibit the expression of transduced genes driven by Moloney murine leukemia virus (MoMLV)-typed retroviral vectors by binding to the primer binding site (PBS) located downstream of the MLV-long terminal repeat (LTR) of the vectors and recruiting protein complexes that introduce epigenetic silencing marks such as histone modifications and DNA methylation at the MLV-LTR. However, it remains undetermined what domains of ZFP809 among the KRAB domain at N-terminus and the seven zinc fingers are critical for gene silencing. In this study, we assessed subcellular localization, gene silencing ability, and binding ability to the PBS of a series of truncated and mutated ZFP809 proteins. We revealed the essential role of the KRAB A box for all functions assessed, together with the accessory roles of a subset of zinc fingers. Our data also suggest that interaction between KAP1 and the KRAB A box of ZFP809 is critical in KAP1-dependent control of gene silencing for ZFP809 targets.

Original languageEnglish
Article numbere0139274
JournalPloS one
Issue number9
Publication statusPublished - 2015 Sept 29

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology
  • General Agricultural and Biological Sciences
  • General


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