Project 4: Application of Comparative Genomics, Transcriptomics, & Proteomics Opt

项目4：比较基因组学、转录组学的应用，

• 批准号: 7089426
• 负责人: LISA ALVAREZ-COHEN
• 金额: $ 38.61万
• 依托单位: UNIVERSITY OF CALIFORNIA BERKELEY
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-04-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7089426
• 关键词: anaerobiosis; bacterial genetics; biotransformation; chemical kinetics; chlorination; detoxification; environmental exposure; environmental toxicology; gene expression; genetic regulatory element; genetic transcription; mass spectrometry; microarray technology; polymerase chain reaction; protein biosynthesis; proteomics; trichloroethylene

This proposal will apply advanced molecular tools to understand and optimize the microbial detoxification of common Superfund pollutants, perchloroethene (PCE) and trichloroethene (TCE), which pose a significant threat to human and ecological health. By studying the fundamental processes responsible for anaerobic microbial degradation of PCE and TCE, this work will promote improved situ bioremediation processes. Previous NIEHS-funded research sought to identify and understand the microbes within complex communities responsible for dechlorination. This work takes the next logical step by focusing on the only genus of bacteria, Dehalococcoides, known to completely reduce PCE and TCE to ethene. Whole-genome microarrays, proteomic analyses, and quantitative PCR will be used to characterize the genomic differences between a variety of Dehalococcoides strains and to evaluate gene expression and proteomic changes caused by reductive dechlorination of a variety of substrates, growth in simple and complex microbial communities, and other physiological perturbations. Genomic and transcriptomic comparison of Dehalococcoides strains with different degradation abilities will identify the pathways responsible for specific and general metabolism as well as reveal the evolutionary relationship between the various isolated strains. Transcriptomic comparison of Dehalococcoides strains in pure and mixed cultures will identify pathways involved in inter-species interactions, reveal the nutritional needs and metabolic roles of Dehalococcoides in consortia, and address the limitation in bioremediation applications presented by the poor growth of isolated Dehalococcoides strains. Data from strain identification, gene.expression, and protein production will be complied into kinetic models that can be used to predict rates of reductive dechlorination by poorly characterized microbial communities. This research will meet the SBRP goal of limiting the human exposure and toxicity of chemicals commonly found at Superfund sites by advancing the development of in situ bioremediation of PCE and TCE, a technology that destroys contaminants in their subsurface location without extraction to the surface, avoiding potential human and ecological exposure.

该方案将应用先进的分子工具来了解和优化微生物