Large-scale DNA sequencing for comparative systems biology

我们对秀丽隐杆线虫进行了深入的cDNA分析。获得了通过V-capping方法制备的约150，000个全长cDNA克隆的EST，产生了4，909个新的cDNA物种。用全标本原位杂交方法分析了11，309个cDNA的表达谱。通过下一代DNA测序仪分析cDNA文库的mRNA以获得完整的transriptome信息。这些数据被整合到NEXTDB中，该数据库与秀丽隐杆线虫中央数据库WormBase相连。在基因表达调控网络的研究方面，我们鉴定了1）在早期肠谱系中具有阶段特异性的顺式调控序列及其反式因子; 2）在热感觉神经元AFD中的表达调控序列及其调控基因。在mRNA定位机制的研究中，我们鉴定了3`-UTR中的pos-1 mRNA定位顺式元件及其反式因子，2）mex-3 mRNA定位顺式元件。我们用C语言开发了一个半自动的细胞形状模型创建系统。线虫胚胎发生我们对一株线虫D.利用桑格法和新一代测序仪的混合方法对cronatus进行了测序。

We performed cDNA analysis of the nematode C.elegans thouroughly. ESTs of about 150,000 full-length cDNA clones that had been made by the V-capping method were obtained to produce 4,909 new cDNA species. Altogether 11,309 cDNA species have been analysed for their expression patterns by the whole mount in situ hybridization. The mRNAs for the cDNA libraries were analysed by the next generation DNA sequencer to obtain the whole transriptome information. These data were integrated in NEXTDB, which were linked with the C.elegans central database WormBase. As to the studies for gene expression regulation network, we identified 1) the stage-specific cis-regulatory sequences and their trans-factors in the early intestine lineage, and 2) the regulatory sequence for the expression in the thermo-sensory neuron AFD and its ragulatory genes. As to the studies for mRNA localization mechanisms, we identified 1) cis-element in its 3`-UTR for pos-1 mRNA localization and its trans-factor, and 2) cis-element for mex-3 mRNA localization. We developed a semi-automatic system for the creation of cell shape models in C. elegans embryogenesis. We carried out whole genome sequencing of a nematode D. cronatus by the hybrid method using the Sanger method and the new generation sequencer.