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CCCTC-binding factor: to loop or to bridge

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Abstract.

Eukaryotic genomes have complex spatial organization in the nucleus. The factors and the mechanisms involved in this organization remain an enigma. Among the many proteins implicated in such a role, the ubiquitous Zn-finger protein CTCF stands out. Here we summarize the evidence placing CTCF in the enviable position of a master organizer of the genome. CTCF can form loops in cis, and can bridge sequences located on different chromosomes in trans. The thousands of CTCF binding sites, identified in recent genome-wide localization studies, and their distribution along the genome further support a crucial role of CTCF as a chromatin organizer.

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Authors and Affiliations

  1. Department of Molecular Biology, University of Wyoming, Laramie, WY, 82071, USA

    J. Zlatanova

  2. Department of Cellular Biotechnology and Hematology, Second Faculty of Medicine and Surgery, University “La Sapienza” and Pasteur Institute-Fondazione Cenci Bolognetti, Rome, Italy

    P. Caiafa

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  1. J. Zlatanova
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  2. P. Caiafa
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Correspondence to J. Zlatanova.

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Received 10 October 2008; received after revision 11 December 2008; accepted 16 December 2008

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Zlatanova, J., Caiafa, P. CCCTC-binding factor: to loop or to bridge. Cell. Mol. Life Sci. 66, 1647–1660 (2009). https://doi.org/10.1007/s00018-009-8647-z

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  • DOI: https://doi.org/10.1007/s00018-009-8647-z

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