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Transforming growth factor β promotes complexes between Smad proteins and the CCCTC-binding factor on the H19 imprinting control region chromatin
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwiginstitutet för cancerforskning. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik, Evolutionsbiologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwiginstitutet för cancerforskning.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Ludwiginstitutet för cancerforskning.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik, Evolutionsbiologi.
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2010 (engelsk)Inngår i: Journal of Biological Chemistry, ISSN 0021-9258, E-ISSN 1083-351X, Vol. 285, nr 26, s. 19727-19737Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Whether signal transduction pathways regulate epigenetic states in response to environmental cues remains poorly understood. We demonstrate here that Smad3, signaling downstream of transforming growth factor beta, interacts with the zinc finger domain of CCCTC-binding factor (CTCF), a nuclear protein known to act as "the master weaver of the genome." This interaction occurs via the Mad homology 1 domain of Smad3. Although Smad2 and Smad4 fail to interact, an alternatively spliced form of Smad2 lacking exon 3 interacts with CTCF. CTCF does not perturb well established transforming growth factor beta gene responses. However, Smads and CTCF co-localize to the H19 imprinting control region (ICR), which emerges as an insulator in cis and regulator of transcription and replication in trans via direct CTCF binding to the ICR. Smad recruitment to the ICR requires intact CTCF binding to this locus. Smad2/3 binding to the ICR requires Smad4, which potentially provides stability to the complex. Because the CTCF-Smad complex is not essential for the chromatin insulator function of the H19 ICR, we propose that it can play a role in chromatin cross-talk organized by the H19 ICR.

sted, utgiver, år, opplag, sider
USA: The American Society for Biochemistry and Molecular Biology, Inc. , 2010. Vol. 285, nr 26, s. 19727-19737
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URN: urn:nbn:se:uu:diva-127228DOI: 10.1074/jbc.M109.088385ISI: 000279012000005PubMedID: 20427289OAI: oai:DiVA.org:uu-127228DiVA, id: diva2:329368
Tilgjengelig fra: 2010-07-09 Laget: 2010-07-09 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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