Improved Modeling of RNA/DNA Hybridization

RNA/DNA 杂交模型的改进

• 批准号: 6948328
• 负责人: HYUNG R LEE
• 金额: $ 37.24万
• 依托单位: DNA SOFTWARE, INC.
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-21 至 2006-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6948328
• 关键词: biotechnology; chemical kinetics; computer human interaction; computer program /software; computer system design /evaluation; nucleic acid hybridization; nucleic acid probes; oligonucleotides; technology /technique development; thermodynamics; ultraviolet radiation

DESCRIPTION (provided by applicant): The human genome encodes approximately 30,000 genes, and alternative splicing results in approximately 100,000 different RNAs in the cell. Genomic discoveries for disease susceptibility require thermodynamic knowledge in RNA-DNA interactions to create optimal assays using primers and probes. The overall, long-term mission of DNA Software Inc. is to facilitate genomic investigations with software that incorporates state-of-the-art knowledge of thermodynamics and kinetics of nucleic acid folding and hybridization. To enhance our existing Oligonucleotide Modeling Platform (OMP) platform, we propose to measure a complete thermodynamic i parameter database for RNA-DNA hybridization to facilitate the next step in the Human Genome Project, RNA expression assays. Most of the needed RNA-DNA nearest-neighbor parameters have never been measured. This proposal will address this gap in knowledge by performing a systematic series of measurements, appropriate data analysis and theoretical modeling. The parameters will be incorporated into OMP's database to improve the accuracy of RNA-DNA hybridization predictions. Completion of an RNA-DNA thermodynamic database will require approximately 320 new UV thermal denaturation measurements in addition to those already in the literature; thus, we are pursuing a fast-track proposal. In Phase I, we will determine the thermodynamics of 84 sequences to improve the existing match RNA-DNA parameters under various salt conditions, and perform thermal denaturation measurements on a sampling of other motifs in RNA-DNA heteroduplexes including internal single mismatches, terminal mismatches and dangling ends. These initial results will provide guidelines for the design of over 250 measurements in phase II, which will provide a complete database for mismatches, terminal mismatches, dangling ends, as well as bulges, internal loops and Mg2+ concentration dependence. Also in phase II, we will incorporate all of these parameters into our algorithms, create GUIs to extend OMP's capabilities and perform experimental validations. These accurate probe/primer designs will facilitate a variety of biotechnologies, such as gene-specific reverse-transcription PCR, cRNA expression profiling, RNA antisense technology, in situ hybridization of mRNA, Northern blot analysis, and other RNA detection methods. This work will also allow for improved detection assays for bacterial and RNA virus pathogens, which are of considerable interest for national health and biodefense.

描述（由申请人提供）：人类基因组编码约30，000个基因，可变剪接导致细胞中约100，000种不同的RNA。疾病易感性的基因组发现需要RNA-DNA相互作用的热力学知识，以使用引物和探针创建最佳检测。DNA软件公司的总体长期使命是：是利用结合了核酸折叠和杂交的热力学和动力学的最新知识的软件来促进基因组研究。为了增强我们现有的寡核苷酸建模平台（OMP）平台，我们建议测量RNA-DNA杂交的完整热力学i参数数据库，以促进人类基因组计划的下一步，RNA表达测定。大多数所需的RNA-DNA最近邻参数从未被测量过。该提案将通过进行一系列系统的测量、适当的数据分析和理论建模来弥补这一知识差距。这些参数将被纳入OMP的数据库，以提高RNA-DNA杂交预测的准确性。完成一个RNA-DNA热力学数据库将需要大约320个新的紫外热变性测量除了那些已经在文献中，因此，我们正在追求一个快速通道的建议。在第一阶段，我们将确定84个序列的热力学，以改善现有的匹配RNA-DNA参数在各种盐条件下，并进行热变性测量的其他图案的RNA-DNA异源双链体，包括内部单错配，末端错配和悬空末端的采样。这些初步结果将为第二阶段超过250个测量的设计提供指导，这将提供一个完整的数据库，用于失配，末端失配，悬空末端，以及凸起，内部循环和Mg 2+浓度依赖性。同样在第二阶段，我们将把所有这些参数纳入我们的算法，创建GUI来扩展OMP的功能，并进行实验验证。这些精确的探针/引物设计将促进各种生物技术，如基因特异性逆转录PCR、cRNA表达谱、RNA反义技术、mRNA原位杂交、北方印迹分析和其他RNA检测方法。这项工作还将改进细菌和RNA病毒病原体的检测方法，这对国家健康和生物防御具有相当大的意义。