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The promoter region of the murine p75 TNF receptor (TNF-R) was isolated from a mouse genomic DNA cosmid library. The promoter region is devoid of TATA box and has the characteristics of a house keeping gene since it contains multiple SP1 binding sites. Its mRNA has different initiation sites in different lymphoid cell lines. This promoter confers transcriptional activity to heterologous reporter genes. Deletion analysis showed that there is a silencer element located upstream from position -841. This inhibitory sequence is active both in fibroblasts and T-cell lines transiently or permanently transfected. A fragment from -929 to -841 is capable of transferring this 'silencer' activity to the early SV40 promoter. This activity could be blocked in trans- when a plasmid containing the same sequence was co-transfected with the reporter plasmid indicating that a protein binds to this region of the promoter.


Journal article


Mol Immunol

Publication Date





125 - 134


Animals, Base Sequence, Cloning, Molecular, Gene Expression Regulation, Mice, Molecular Sequence Data, Organ Specificity, Promoter Regions, Genetic, Receptors, Tumor Necrosis Factor, Sequence Analysis, DNA