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The human transforming growth factor alpha promoter directs transcription initiation from a single site in the absence of a TATA sequence.

机译:人转化生长因子α启动子在没有TATA序列的情况下指导从单个位点的转录起始。

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Transforming growth factor alpha (TGF-alpha) is a transformation-responsive mitogenic polypeptide that is expressed in the brain, epithelial cells, and activated macrophages. We isolated and characterized the TGF-alpha promoter and localized the 5' end of the TGF-alpha transcript to a unique position. Surprisingly, no apparent TATA box was present in the promoter sequence, suggesting that transcription from mammalian genes can initiate at unique and specific positions from promoters lacking this sequence motif.
机译:转化生长因子α(TGF-alpha)是一种在大脑,上皮细胞和活化的巨噬细胞中表达的转化反应性有丝分裂多肽。我们分离并表征了TGF-α启动子,并将TGF-α转录本的5'端定位在一个独特的位置。令人惊讶地,在启动子序列中不存在明显的TATA盒,这表明来自哺乳动物基因的转录可以在缺乏该序列基序的启动子的独特且特定的位置开始。

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