Mitotic phosphorylation of CCCTC-binding factor (CTCF) reduces its DNA binding activity

Takeshi Sekiya, Kensaku Murano, Kohsuke Kato, Atsushi Kawaguchi, Kyosuke Nagata

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


During mitosis, higher order chromatin structures are disrupted and chromosomes are condensed to achieve accurate chromosome segregation. CCCTC-binding factor (CTCF) is a highly conserved and ubiquitously expressed C2H2-type zinc finger protein which is considered to be involved in epigenetic memory through regulation of higher order chromatin architecture. However, the regulatory mechanism of CTCF in mitosis is still unclear. Here we found that the DNA-binding activity of CTCF is regulated in a phosphorylation-dependent manner during mitosis. The linker domains of the CTCF zinc finger domain were found to be phosphorylated during mitosis. The phosphorylation of linker domains impaired the DNA-binding activity in vitro. Mutation analyses showed that amino acid residues (Thr289, Thr317, Thr346, Thr374, Ser402, Ser461, and Thr518) located in the linker domains were phosphorylated during mitosis. Based on these results, we propose that the mitotic phosphorylation of the linker domains of CTCF is important for the dissociation of CTCF from mitotic chromatin.

Original languageEnglish
Pages (from-to)397-404
Number of pages8
JournalFEBS Open Bio
Issue number3
Publication statusPublished - 2017 Mar 1


  • higher order chromatin structure
  • mitosis
  • zinc finger protein

ASJC Scopus subject areas

  • General Biochemistry,Genetics and Molecular Biology


Dive into the research topics of 'Mitotic phosphorylation of CCCTC-binding factor (CTCF) reduces its DNA binding activity'. Together they form a unique fingerprint.

Cite this