波谱学杂志 ›› 2000, Vol. 17 ›› Issue (2): 137-141.

• 研究论文 • 上一篇    下一篇

N-磷酰化叉肽结构与NMR波谱

冯玉萍, 曹胜利, 赵玉芬   

  1. 清华大学化学系, 清华大学生命科学与工程研究院, 教育部生命有机磷开放实验室, 北京 100084
  • 收稿日期:1999-11-16 修回日期:1999-12-27 出版日期:2000-04-05 发布日期:2018-01-11
  • 作者简介:冯玉萍,女,1946年出生,副教授
  • 基金资助:
    国家自然科学基金(批准号:39870415)及博士后基金资助项目

THE STUDY ON THE STRUCTURAL CHARACTERISTICS OF N-PHOSPHORYLATED BRANCHED PEPTIDE

FENG Yuping, CAO Shengli, ZHAO Yufen   

  1. Dept. of Chemistry, School of Life Science & Engineering of Tsinghua University, Bio-organic Phosphorus Chemistry Laboratory of State Education, Beijing 100084
  • Received:1999-11-16 Revised:1999-12-27 Online:2000-04-05 Published:2018-01-11

摘要: 测定了N-磷酰化叉肽(2-5)在溶液中的NMR谱.发现它们具有非对映异位,分子无规卷曲及氢键相互作用.波谱分析表明,磷酰基的参与,主要影响其结合部位的氨基酸.由于肽平面的生成及分子内、分子间氢键影响的改变,致使叉肽中支链的Dipp-Ala磷酰基与β位羰基的相对位置发生变化.磷酰基与N-Cα基团仍处于反式位置,这可能是该氨基酸侧链无极性基团的缘故.

关键词: N-磷酰化叉肽, NMR, 构象分析

Abstract: The structural characteristics of N-phosphorylated branched peptides 2-5 in solution have been studied by NMR. Diastereotopic phenomena, the interaction of hydrogen bonds and no regular secondary structures have been observed. It has been shown that participation of phosphoryl group only affects amino acid, which was bond on the phosphoryl group. Due to the formation of peptide planes and the increase of the effect of hydrogen bond between inter or intra-molecules, the position of P=O group relating with Cβ=O group in compounds 2 5 was changed from trans into gauche conformation as compared with that in Dipp-Ala of compound 1. The phosphoryl group was still lain on trans position with N-Cα group. It suggests that there is not any polar groups on the side chain of the amino acid. These structural characteristics will provide some evidence for their studies.

Key words: N-phosphorylated branched peptide, NMR Conformation analysis