The DNA helicase ChlR1 is required for sister chromatid cohesion in mammalian cells

Joanna L. Parish, Jack Rosa, Xiaoyu Wang, Jill M. Lahti, Stephen J. Doxsey, Elliot J. Androphy

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

It has recently been suggested that the Saccharomyces cerevisiae protein Chl1p plays a role in cohesion establishment. Here, we show that the human ATP-dependent DNA helicase ChlR1 is required for sister chromatid cohesion in mammalian cells. Localization studies show that ChlR1 diffusely coats mitotic chromatin in prophase and then translocates from the chromatids to concentrate at the spindle poles during the transition to metaphase. Depletion of ChlR1 protein by RNA interference results in mitotic failure with replicated chromosomes failing to segregate after a pro-metaphase arrest. We show that depletion also results in abnormal sister chromatid cohesion, determined by increased separation of chromatid pairs at the centromere. Furthermore, biochemical studies show that ChlR1 is in complex with cohesin factors Scc1, Smc1 and Smc3. We conclude that human ChlR1 is required for sister chromatid cohesion and, hence, normal mitotic progression. These functions are important to maintain genetic fidelity.

Original languageEnglish (US)
Pages (from-to)4857-4865
Number of pages9
JournalJournal of cell science
Volume119
Issue number23
DOIs
StatePublished - Dec 1 2006

Keywords

  • Cohesin
  • Cohesion
  • Helicase
  • Mitosis

ASJC Scopus subject areas

  • Cell Biology

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