pThe TATA-binding protein (TBP) plays a central role in eukaryotic transcription and forms protein complexes with TBP-associated factors (TAFs). The genes encoding TAFsubII/sub proteins frequently map to chromosomal regions altered in human neoplasias. TAFsubII/sub170 of B-TFIID is a member of the SF2 superfamily of putative helicases. Members of this superfamily have also been implicated in several human genetic disorders. In this study we have isolated human genomic clones encoding iTAFsubII/sub170/i and we show that the gene contains 37 introns. Ribonuclease-protection experiments revealed that iTAFsubII/sub170/i has multiple transcription start sites, consistent with the observation that the promoter lacks a canonical TATA box and initiator element. Deletion analysis of the promoter region showed that a fragment of 264 bp is sufficient to direct transcription. In addition, we determined the chromosomal localization by two independent methods which mapped the gene to human chromosome 10q22-q23 between the markers D10S185 and WI-1183. The region surrounding these markers has been implicated in several human disorders./p
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机译:> TATA结合蛋白(TBP)在真核转录中起着核心作用,并与TBP相关因子(TAFs)形成蛋白复合物。编码TAF II sub>蛋白的基因经常映射到人类肿瘤中改变的染色体区域。 B-TFIID的TAF II sub> 170是推定解旋酶SF2超家族的成员。这个超家族的成员也与几种人类遗传疾病有关。在这项研究中,我们分离了编码 TAF II sub> 170 i>的人类基因组克隆,并显示该基因包含37个内含子。核糖核酸酶的保护实验表明, TAF II sub> 170 i>具有多个转录起始位点,与观察到的启动子缺乏规范的TATA框和启动子元件的观察结果一致。启动子区的缺失分析表明264 bp的片段足以指导转录。此外,我们通过两种独立的方法确定了染色体的定位,该方法将基因定位到标记D10S185和WI-1183之间的人类染色体10q22-q23。这些标记物周围的区域与几种人类疾病有关。 p>
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