A CpG-rich bidirectional promoter induces the T-cell death-associated gene 51 and downregulates an inversely oriented transcript during early T-cell activation.
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.
Division of Immunology, Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, D-63225 Langen, Germany.
Marc
M
Meier-Noorden
Sven
S
Flindt
Ulrich
U
Kalinke
Thomas
T
Hinz
D001483:Base Sequence; D002460:Cell Line; D018899:CpG Islands / Q000235:genetics*; D018076:DNA, Complementary / Q000235:genetics; D015536:Down-Regulation; D005786:Gene Expression Regulation; D006801:Humans; D019169:Jurkat Cells; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D008213:Lymphocyte Activation / Q000235:genetics*; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D017384:Sequence Deletion; D013601:T-Lymphocytes / Q000166:cytology / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics*; D024363:Transcription Initiation Site; D014158:Transcription, Genetic / Q000235:genetics; D014162:Transfection
D018076:DNA, Complementary; C491923:PHLDA1 protein, human; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D008156:Luciferases