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Review
. 2005 Oct;5(10):793-806.
doi: 10.1038/nri1708.

Regulation of MHC class II gene expression by the class II transactivator

Walter Reith  1 , Salomé LeibundGut-Landmann, Jean-Marc Waldburger
Affiliations
Review

Regulation of MHC class II gene expression by the class II transactivator

Walter Reith et al. Nat Rev Immunol. 2005 Oct.

Abstract

MHC class II molecules are pivotal for the adaptive immune system, because they guide the development and activation of CD4+ T helper cells. Fulfilling these functions requires that the genes encoding MHC class II molecules are transcribed according to a strict cell-type-specific and quantitatively modulated pattern. This complex gene-expression profile is controlled almost exclusively by a single master regulatory factor, which is known as the class II transactivator. As we discuss here, differential activation of the three independent promoters that drive expression of the gene encoding the class II transactivator ultimately determines the exquisitely regulated pattern of MHC class II gene expression.

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