Global S&T Development Trend Analysis Platform of Resources and Environment
项目编号 | 1458017 |
Collaborative Research: Relating detrital peptide sequences to particulate organic matter diagenetic histories | |
Richard Keil | |
主持机构 | University of Washington |
项目开始年 | 2015 |
2015-02-15 | |
项目结束日期 | 2017-01-31 |
资助机构 | US-NSF |
项目类别 | Standard Grant |
项目经费 | 399248(USD) |
国家 | 美国 |
语种 | 英语 |
英文摘要 | Biological, chemical, and physical processes alter recently deposited marine sediments. During this alteration, commonly referred to as early diagenesis, the quantity and composition of organic matter is changed which influences key components of the marine carbon cycle. In this study, researchers will use analytical techniques to evaluate the geochemistry of peptides during early diagenesis, and develop methods for assessing the role bacteria play. This research is important because organic molecules such as peptides influence degradation rates and the fate of carbon and nitrogen in the ocean, and therefore have broad relevance for understanding the geochemical cycling of these key nutrients. The project will also involve research opportunities for undergraduate and graduate students, as well as encourage diversity in the next generation of ocean scientists by providing summer internship opportunities for female middle school students from underrepresented communities (Project COOL). Most diagenetic indices for evaluating how "far along" organic matter is in its early diagenesis are based on amino acid compositions. Total hydrolyzable amino acid compositions indicate, in a coarse manner, organic matter degradation status, bioavailability, and source. Further development of amino acids as tools to assess geochemical processes requires including the wealth of information held within the peptide chains, information that is currently lost during hydrolysis. A powerful approach to sequencing detrital peptides is the application of tandem mass spectroscopy followed by de novo sequencing. In this project, researchers will use de novo sequencing to evaluate peptide and protein geochemistry during early diagenesis, and to develop a peptidoglycan-specific quantification method that allows utilization of the unique peptidoglycan peptide structures found in different bacteria. Specific actions to be taken under this project include (1) applying de novo sequencing to a set of well-characterized archive samples, (2) conducting a set of sorption experiments to evaluate the propensity for different detrital peptides to adhere to mineral surfaces and be protected from degradation, and (3) developing a quantitative method for measuring peptidoglycan peptides. By comparing detrital peptides to other known quantities of the sample set, relationships between organic matter diagenesis and peptide source, sequence, and preservation will be assessed. |
来源学科分类 | Geosciences - Ocean Sciences |
文献类型 | 项目 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/67588 |
专题 | 环境与发展全球科技态势 |
推荐引用方式 GB/T 7714 | Richard Keil.Collaborative Research: Relating detrital peptide sequences to particulate organic matter diagenetic histories.2015. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Richard Keil]的文章 |
百度学术 |
百度学术中相似的文章 |
[Richard Keil]的文章 |
必应学术 |
必应学术中相似的文章 |
[Richard Keil]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论