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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

The chromatin remodeler Mi-2beta is required for CD4 expression and T cell development.

Changes in chromatin structure underlie the activation or silencing of genes during development. The chromatin remodeler Mi-2beta is highly expressed in thymocytes and is presumed to be a transcriptional repressor because of its presence in the nucleosome remodeling deacetylase (NuRD) complex. Using conditional inactivation, we show that Mi-2beta is required at several steps during T cell development: for differentiation of beta selected immature thymocytes, for developmental expression of CD4, and for cell divisions in mature T cells. We further show that Mi-2beta plays a direct role in promoting CD4 gene expression. Mi-2beta associates with the CD4 enhancer as well as the E box binding protein HEB and the histone acetyltransferase (HAT) p300, enabling their recruitment to the CD4 enhancer and causing histone H3-hyperacetylation to this regulatory region. These findings provide important insights into the regulation of CD4 expression during T cell development and define a role for Mi-2beta in gene activation.[1]

References

  1. The chromatin remodeler Mi-2beta is required for CD4 expression and T cell development. Williams, C.J., Naito, T., Arco, P.G., Seavitt, J.R., Cashman, S.M., De Souza, B., Qi, X., Keables, P., Von Andrian, U.H., Georgopoulos, K. Immunity (2004) [Pubmed]
 
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