首都医科大学学报 ›› 2004, Vol. 25 ›› Issue (4): 450-453.

• 论著·基础研究 • 上一篇    下一篇

一种抑制蛋白激酶CK2活性的新多肽的分离和鉴别

王泽生1, 杨晓梅1, 油红捷1, 杜毅峰1, Etienne J. Nouwen2   

  1. 1. 首都医科大学生物化学与分子生物学系;2. 比利时安特卫普大学生物医学系神经生物与神经药理实验室
  • 收稿日期:2004-03-17 修回日期:1900-01-01 出版日期:2004-10-15 发布日期:2004-10-15

Isolation and Identification of a New Peptide that Inhibits Protein Kinase CK2

Wang Zesheng1, Yang Xiaomei1, You Hongjie1, Du Yifeng1, Etienne J. Nouwen2   

  1. 1. Department of Biochemistry and Molecular Biology, Capital University of Medical Sciences;2. Laboratory of Neurobiology and Neuropharmacology, Department of Biomedical Sciences, University of Antwerp UIA, Belgium
  • Received:2004-03-17 Revised:1900-01-01 Online:2004-10-15 Published:2004-10-15

摘要: 从猪肾上腺髓质嗜铬细胞分泌颗粒裂解物中纯化出3种新多肽,经N-末端降解分析和质谱测定,它们分别位于猪嗜铬颗粒蛋白A(CgA) 308-324、308-328及308-329肽段,具有相同N-端区,而C-端长度不同.合成的CgA 308-324肽段,即GN-17在浓度低于6 μmol/L时即可竞争性抑制CK2活性,IC50为50 μmol/L.

关键词: 嗜铬颗粒蛋白A, 活性肽, 质谱, 蛋白激酶CK2

Abstract: Three new peptides were purified from porcine chromaffin granule lysate, sequenced by N-terminal degradation and identified with mass spectrometry. They were located at chromogranin A 308—324, 308—328 and 308—329; sharing the same N-terninus but with diffferent extends at the C-terninus. The short form of the peptide (CgA 308—324, GN-17) was synthesized and was found to competitively inhibit CK2 activity at a concentrition as low as 6 μmol/L. The half-maximal inhibition reached at peptide concentration of about 50 μmol/L.

Key words: chromogranin A, active peptide, mass spectrometry, protein kinase CK2

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