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Divergent distributions of inverted repeats and G-quadruplex forming sequences in Saccharomyces cerevisiae

机译:酵母菌酿酒酵母中倒置重复和G-Quadflex形成序列的发散分布

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The importance of DNA structure in the regulation of basic cellular processes is an emerging field of research. Among local non-B DNA structures, inverted repeat (IR) sequences that form cruciforms and G-rich sequences that form G-quadruplexes (G4) are found in all prokaryotic and eukaryotic organisms and are targets for regulatory proteins. We analyzed IRs and G4 sequences in the genome of the most important biotechnology microorganism, S. cerevisiae. IR and G4-prone sequences are enriched in specific genomic locations and differ markedly between mitochondrial and nuclear DNA. While G4s are overrepresented in telomeres and regions surrounding tRNAs, IRs are most enriched in centromeres, rDNA, replication origins and surrounding tRNAs. Mitochondrial DNA is enriched in both IR and G4-prone sequences relative to the nuclear genome. This extensive analysis of local DNA structures adds to the emerging picture of their importance in genome maintenance, DNA replication and transcription of subsets of genes.
机译:DNA结构在基本细胞过程调节中的重要性是一种新兴的研究领域。在局部非B DNA结构中,在所有原核和真核生物中发现形成G-四链体(G4)的倒置的重复(IR)序列,其形成G-Quadryperes(G4),并且是调节蛋白的靶标。我们分析了在最重要的生物技术微生物,酿酒酵母的基因组中的IRS和G4序列。 IR和G4易于序列在特定基因组位置富集,并且在线粒体和核DNA之间显着不同。虽然G4s在Trnas周围的端粒体和地区持久化,但IRS最富含Centromeres,RDNA,复制起源和周围的TRNA。相对于核基因组,在IR和G4易发序列中富集线粒体DNA。对局部DNA结构的这种广泛分析增加了它们在基因组维护,DNA复制和基因子群的转录中的重要性。

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