松属参考基因组比较研究揭示转座元件相互关联的基因网络。
Comparative Study of Pine Reference Genomes Reveals Transposable Element Interconnected Gene Networks.
机构信息
Genetic Resource Centre, Latvian State Forest Research Institute "Silava", LV2169 Salaspils, Latvia.
Linnean Centre for Plant Biology, Department of Plant Biology, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden.
出版信息
Genes (Basel). 2020 Oct 16;11(10):1216. doi: 10.3390/genes11101216.
Sequencing the giga-genomes of several pine species has enabled comparative genomic analyses of these outcrossing tree species. Previous studies have revealed the wide distribution and extraordinary diversity of transposable elements (TEs) that occupy the large intergenic spaces in conifer genomes. In this study, we analyzed the distribution of TEs in gene regions of the assembled genomes of and using high-performance computing resources. The quality of draft genomes and the genome annotation have significant consequences for the investigation of TEs and these aspects are discussed. Several TE families frequently inserted into genes or their flanks were identified in both species' genomes. Potentially important sequence motifs were identified in TEs that could bind additional regulatory factors, promoting gene network formation with faster or enhanced transcription initiation. Node genes that contain many TEs were observed in multiple potential transposable element-associated networks. This study demonstrated the increased accumulation of TEs in the introns of stress-responsive genes of pines and suggests the possibility of rewiring them into responsive networks and sub-networks interconnected with node genes containing multiple TEs. Many such regulatory influences could lead to the adaptive environmental response clines that are characteristic of naturally spread pine populations.
对几个松树种的超大基因组进行测序,使这些异花授粉树种的比较基因组分析成为可能。先前的研究揭示了转座元件(TEs)在针叶树基因组中的大基因间空间中的广泛分布和非凡多样性。在这项研究中,我们利用高性能计算资源分析了组装基因组中 和 基因区域中 TEs 的分布。草案基因组的质量和基因组注释对 TE 的研究有重大影响,讨论了这些方面。在两个物种的基因组中都鉴定到了几种经常插入基因或其侧翼的 TE 家族。在可能结合额外调节因子的 TE 中鉴定到了潜在重要的序列基序,促进了具有更快或增强转录起始的基因网络形成。在多个潜在的转座元件相关网络中观察到包含许多 TEs 的节点基因。本研究表明,TE 在应激反应基因的内含子中积累增加,表明它们有可能被重新布线到响应网络和与包含多个 TEs 的节点基因相互连接的子网络中。许多这样的调节影响可能导致自然扩散的松树种群特有的适应性环境响应梯度。