Genome architecture and expression

基因组结构和表达

• 批准号: 328095-2009
• 负责人: Chen, Nansheng
• 金额: $ 3.64万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=515056
• 关键词: Genome; architecture; expression

With thousands of genomes being sequenced and even more entering the sequencing pipeline, the next major challenge in the era of genomics is to understand how the genome sequence directs gene expression in living organisms, thereby dictating biology and behavior. My research program has been designed to tackle this challenge directly. In particular, I will take advantage of the genome sequences of closely related species to identify conserved sequence blocks (also known as synteny blocks) and genome rearrangement events. I will focus on the comparative analysis of the genome of a small soil dwelling nematode worm called Caenorhabditis elegans (C. elegans) and the genomes of four other Caenorhabditis species: C. briggsae, C. remanei, C. brenneri, and C. japonica. Research on C. elegans has revealed critical secrets of biological processes. Indeed, in the last six years, six scientists have won Nobel prizes for their work using C. elegans as a model system. My research program builds on the assumption that functionally important genome sequence blocks will remain conserved in different species. The genome conservation information will be used to understand gene expression data acquired by sequencing the expressed messages in C. elegans samples. I will examine the correlation of genes within different genome blocks, and their expression profiles in different developmental stages and cell types. Furthermore, I will explore transcriptional regulation of C. elegans genome expression. Working with DAF-19, a conserved transcription factor that can be found in a wide range of species, I will continue to explore how a gene battery -- a set of genes that are regulated by a common transcription factor -- is regulated, aiming to gain insight into the transcriptional regulation of genes at the genome scale. Specifically, I will investigate the promoter code, the understanding of which will shed light on the identification of target genes and differentiation and development. This program of research brings together methods in bioinformatics, functional genomics, comparative genomics and molecular biology to unravel the secret of genome expression and, in particular, the underlying mechanisms of this biological process.

随着成千上万的基因组被测序，甚至更多的基因组进入测序管道，基因组学时代的下一个主要挑战是了解基因组序列如何指导生物体中的基因表达，从而决定生物学和行为。我的研究计划旨在直接应对这一挑战。特别是，我将利用密切相关的物种的基因组序列，以确定保守的序列块（也称为同线性块）和基因组重排事件。本文将着重对一种小型土栖线虫秀丽隐杆线虫（Caesophylhabditis elegans）的基因组进行比较分析。elegans）和其他四种小杆线虫的基因组：C.布里格塞角remanei，C. brenneri和C.日本。对C.线虫揭示了生物过程的关键秘密。事实上，在过去的六年里，有六位科学家因为他们使用C语言的工作而获得了诺贝尔奖。elegans作为一个模型系统。我的研究计划建立在这样的假设之上，即功能重要的基因组序列块在不同的物种中保持保守。基因组保守信息将用于理解通过对C. elegans样本我将研究不同基因组块内基因的相关性，以及它们在不同发育阶段和细胞类型中的表达谱。此外，我将探讨C。线虫基因组表达。通过与可在广泛物种中发现的保守转录因子E19一起工作，我将继续探索基因电池-由共同转录因子调控的一组基因-是如何调节的，旨在深入了解基因组水平上基因的转录调控。具体来说，我将研究启动子代码，了解这将有助于识别靶基因和分化和发育。该研究计划汇集了生物信息学，功能基因组学，比较基因组学和分子生物学的方法，以揭示基因组表达的秘密，特别是这种生物过程的潜在机制。