SIEVING MEDIA FOR DNA SEQUENCING WITH LONG READ LENGTHS

用于长读长 DNA 测序的筛选介质

• 批准号: 2793674
• 负责人: Vladislav Dolnik
• 金额: $ 24.27万
• 依托单位: MOLECULAR DYNAMICS, INC.
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-22 至 2000-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2793674
• 关键词: biomaterial development /preparation; biomaterial evaluation

The goal of the Phase II grant is to develop a DNA sequencing matrix for capillary electrophoresis that achieves very long read lengths (1000 bases) in a semi-automatic, high-throughput environment. We will use the analysis tools developed in Phase I to conduct an advanced investigation of the behavior of linear polymers as sieving matrices for DNA sequencing. We will concentrate on identification and elimination of the factors that contribute to peak broadening. We will investigate the effect of the molecular mass distribution of the sieving polymers on selectivity in both Ogston and reputation modes, as well as the effect of chemical composition of the polymers on both selectivity and separation efficiency. Further, we will optimize the composition of the background electrolyte to improve both selectivity and separation efficiency. This effort will lead to a sieving matrix formulation that supports long sequencing readlengths in a semi-automatic, high-throughput sequencing system. PROPOSED COMMERCIAL APPLICATIONS: Current commercial capillary sequencers produce high-accuracy sequencing read lengths averaging about 450 bases and rarely exceeding 600 bases. This work has the potential to double the average read length. This would reduce the cost of EST sequencing by half, and would be more significant for genome sequencing, since long read lengths greatly facilitate sequence assembly and closure. The resulting matrix could be quickly supplied for commercial use on the MegaBACE 1000 DNA Sequencing System.

第二阶段资助的目标是开发一种DNA测序基质