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Protooncogene Ski cooperates with the chromatin-remodeling factor Satb2 in specifying callosal neurons

Baranek, Constanze and Atanasoski, Suzana. (2012) Protooncogene Ski cooperates with the chromatin-remodeling factor Satb2 in specifying callosal neurons. Proceedings of the National Academy of Sciences of the United States of America, 109 (9). pp. 3546-3551.

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Official URL: http://edoc.unibas.ch/dok/A6211770

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Abstract

First insights into the molecular programs orchestrating the progression from neural stem cells to cortical projection neurons are emerging. Loss of the transcriptional regulator Ski has been linked to the human 1p36 deletion syndrome, which includes central nervous system defects. Here, we report critical roles for Ski in the maintenance of the neural stem cell pool and the specification of callosal neurons. Ski-deficient callosal neurons lose their identity and ectopically express the transcription factor Ctip2. The misspecified callosal neurons largely fail to form the corpus callosum and instead redirect their axons toward subcortical targets. We identify the chromatin-remodeling factor Satb2 as a partner of Ski, and show that both proteins are required for transcriptional repression of Ctip2 in callosal neurons. We propose a model in which Satb2 recruits Ski to the Ctip2 locus, and Ski attracts histone deacetylases, thereby enabling the formation of a functional nucleosome remodeling and deacetylase repressor complex. Our findings establish a central role for Ski–Satb2 interactions in regulating transcriptional mechanisms of callosal neuron specification.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Former Units at DBM > Cellular Neurobiology (Atanasoski)
UniBasel Contributors:Atanasoski, Suzana and Baranek, Constanze and Dittrich, Manuela Susanne and Gaiser, Carine
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:National Academy of Sciences
ISSN:0027-8424
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:30 Aug 2018 15:11
Deposited On:31 Jan 2014 09:50

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