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Global analysis of inverted repeat sequences in human gene promoters reveals their non-random distribution and association with specific biological pathways

机译:人基因启动子的倒置重复序列的全局分析揭示了它们的非随机分布和与特定生物途径的关联

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Inverted repeats (IR) play important roles in specific DNA-dependent processes in simple prokaryotes to complex eukaryotes. They are recognized by a variety of proteins including restriction enzymes, helicases and transcription factors. We evaluate the presence and localization of IRs in all validated human promoter sequences within 1000?bp upstream and downstream of the transcription start site (TSS). The occurrence of 7?bp and longer IRs is located non-randomly in promoter regions, with enrichment within 200?bp upstream of the TSS. The highest frequency of IRs is just before TSS for repeats of 8?bp or longer. A comparison of promoters divided according to the occurrence of five individual promoter motifs shows unique location patterns of IRs. Principal component analyses and hierarchical clustering of IRs abundance demonstrated that they are depleted and/or not enriched in the promoters of stably expressed genes, but show significant enrichments for specific dynamically regulated biological pathways.
机译:倒置重复(IR)在特定的DNA依赖性过程中起重要作用,在简单的原核生物中至复杂的真核生物。它们被各种蛋白质识别,包括限制酶,螺旋酶和转录因子。我们评估IRS在所有验证的人启动子序列中的IRS的存在和定位在转录开始部位(TSS)的上游和下游。 7?BP和较长的IRS的发生在启动子区中非随机地定位,富集在TSS上游的200℃。 IRS的最高频率就在于TSS的8?BP或更长时间之前。根据五个单独的启动子主题的发生,促进剂的比较显示了IRS的独特定位模式。 IRS丰富的主要成分分析和分层聚类表明它们在稳定表达基因的启动子中耗尽和/或不富集,但表现出特异性动态调节的生物途径的显着富集。

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