CTCF binding and higher order chromatin structure of the H19 locus are maintained in mitotic chromatin

Les J. Burke, Ru Zhang, Marek Bartkuhn, Vijay K. Tiwari, Gholamreza Tavoosidana, Sreenivasulu Kurukuti, Christine Weth, Joerg Leers, Niels Galjart, Rolf Ohlsson, Rainer Renkawitz

Research output: Chapter in Book/Report/Conference proceedingChapter

93 Citations (Scopus)

Abstract

Most of the transcription factors, RNA polymerases and enhancer binding factors are absent from condensed mitotic chromosomes. In contrast, epigenetic marks of active and inactive genes somehow survive mitosis, since the activity status from one cell generation to the next is maintained. For the zinc-finger protein CTCF, a role in interpreting and propagating epigenetic states and in separating expression domains has been documented. To test whether such a domain structure is preserved during mitosis, we examined whether CTCF is bound to mitotic chromatin. Here we show that in contrast to other zinc-finger proteins, CTCF indeed is bound to mitotic chromosomes. Mitotic binding is mediated by a portion of the zinc-finger DNA binding domain and involves sequence specific binding to target sites. Furthermore, the chromatin loop organized by the CTCF-bound, differentially methylated region at the Igf2/H19 locus can be detected in mitosis. In contrast, the enhancer/promoter loop of the same locus is lost in mitosis. This may provide a novel form of epigenetic memory during cell division.
Original languageEnglish
Title of host publicationEMBO Journal
Pages3291-3300
Number of pages10
DOIs
Publication statusPublished - 21 Sep 2005

Publication series

NameEMBO Journal
Volume24

Keywords

  • CTCF
  • Cell cycle
  • Chromosome conformation capture
  • Mitotic chromosome

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