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Functional insights into the core-TFIIH from a comparative survey

机译:比较调查对TFIIH核心的功能见解

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TFIIH is a eukaryotic complex composed of two subcomplexes, the CAK (Cdk activating kinase) and the core-TFIIH. The core-TFIIH, composed of seven subunits (XPB, XPD, P62, P52, P44, P34, and P8), plays a crucial role in transcription and repair. Here, we performed an extended sequence analysis to establish the accurate phylogenetic distribution of the core-TFIIH in 63 eukaryotic organisms. In spite of the high conservation of the seven subunits at the sequence and genomic levels, the non-enzymatic P8, P34, P52 and P62 are absent from one or a few unicellular species. To gain insight into their respective roles, we undertook a comparative genomic analysis of the whole proteome to identify the gene sets sharing similar presence/absence patterns. While little information was inferred for P8 and P62, our studies confirm the known role of P52 in repair and suggest for the first time the implication of the core TFIIH in mRNA splicing via P34. ? 2012 Elsevier Inc.
机译:TFIIH是由两个亚复合物,CAK(Cdk激活激酶)和核心-TFIIH组成的真核复合物。 TFIIH核心由七个亚基(XPB,XPD,P62,P52,P44,P34和P8)组成,在转录和修复中起着至关重要的作用。在这里,我们进行了扩展的序列分析,以建立核心TFIIH在63种真核生物中的准确系统发育分布。尽管在序列和基因组水平上七个亚基的高度保守,但一个或几个单细胞物种中却缺少非酶促的P8,P34,P52和P62。为了深入了解它们各自的作用,我们对整个蛋白质组进行了比较基因组分析,以鉴定共享相似存在/缺失模式的基因集。尽管几乎没有推断出P8和P62的信息,但我们的研究证实了P52在修复中的已知作用,并首次暗示了核心TFIIH在通过P34剪接mRNA中的意义。 ? 2012爱思唯尔公司

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