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High-resolution circular chromosome conformation capture assay
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Physiology and Developmental Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Physiology and Developmental Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Physiology and Developmental Biology.
2008 (English)In: Nature protocols, ISSN 1754-2189, Vol. 3, no 2, 303-313 p.Article in journal (Refereed) Published
Abstract [en]

The pioneering chromosome conformation capture (3C) method provides the opportunity to study chromosomal folding in the nucleus. It is based on formaldehyde cross-linking of living cells followed by enzyme digestion, intramolecular ligation and quantitative (Q)-PCR analysis. However, 3C requires prior knowledge of the bait and interacting sequence (termed interactor) rendering it less useful for genome-wide studies. As several recent reports document, this limitation has been overcome by exploiting a circular intermediate in a variant of the 3C method, termed 4C (for circular 3C). The strategic positioning of primers within the bait enables the identification of unknown interacting sequences, which form part of the circular DNA. Here, we describe a protocol for our 4C method, which produces a high-resolution interaction map potentially suitable for the analysis of cis-regulatory elements and for comparison with chromatin marks obtained by chromatin immunoprecipitation (ChIP) on chip at the sites of interaction. Following optimization of enzyme digestions and amplification conditions, the protocol can be completed in 2-3 weeks.

Place, publisher, year, edition, pages
2008. Vol. 3, no 2, 303-313 p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-110475DOI: 10.1038/nprot.2007.540ISI: 000254137000017OAI: oai:DiVA.org:uu-110475DiVA: diva2:277190
Available from: 2009-11-16 Created: 2009-11-16 Last updated: 2010-02-02Bibliographically approved

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