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Gene. 2004 Sep 1;338(2):197-207.

A CpG-rich bidirectional promoter induces the T-cell death-associated gene 51 and downregulates an inversely oriented transcript during early T-cell activation.

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Division of Immunology, Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, D-63225 Langen, Germany.


The human T-cell death-associated gene 51 (TDAG51) is upregulated upon lymphocyte stimulation and in the context of ER stress. Moreover, TDAG51 plays a role in programmed cell death and tumorigenesis. We performed an extensive TDAG51 promoter analysis and found a strong CpG-rich bidirectional promoter within the first 582 nucleotides of the TDAG51 reference DNA complementary to RNA (cDNA). Upon stimulation of primary human T cells, this promoter modulated the downregulation of a newly detected head-to-head oriented transcript. Mapping of the transcription start points revealed that the 5' regions of the TDAG51 mRNA and of the newly identified transcript did not overlap in T cells. Thus, the TDAG51 locus shows an operon-like organization of two head-to-head oriented transcripts that are inversely regulated in T lymphocytes by a CpG-rich bidirectional promoter.

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