申请人:BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
公开号:US10545153B2
公开(公告)日:2020-01-28
Identifying proteins and peptides, and more specifically large-scale sequencing of single peptides in a mixture of diverse peptides at the single molecule level is an unmet challenge in the field of protein sequencing. Herein are methods for identifying amino acids in peptides, including peptides with one or more unnatural amino acids. In one embodiment, the N-terminal amino acid is labeled with a first label and an internal amino acid is labeled with a second label. In some embodiments, the labels are fluorescent labels. In other embodiments, the internal amino acid is Lysine. In other embodiments, amino acids in peptides are identified based on the fluorescent signature for each peptide at the single molecule level.
识别蛋白质和肽,更具体地说,在单分子水平上对多种肽混合物中的单个肽进行大规模测序,是蛋白质测序领域尚未解决的难题。本文提出了识别肽中氨基酸的方法,包括具有一个或多个非天然氨基酸的肽。在一个实施方案中,用第一标签标记 N 端氨基酸,用第二标签标记内部氨基酸。在某些实施方案中,标签是荧光标签。在其他实施方案中,内部氨基酸是赖氨酸。在其他实施方案中,根据单分子水平上每个肽的荧光特征识别肽中的氨基酸。