高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (6): 947.

• 研究快报 • 上一篇    下一篇

咪唑-细胞色素c复合物的溶液结构研究

吴义兵1,2, 陆军2, 姚勇1, 白志平1, 唐雯霞1, 朱德熙2   

  1. 1. 南京大学配位化学国家重点实验室, 南京 210093;
    2. Magnetic Resonance Center, University of Florence, Via L.Sacconi, 6 Sesto Fiorentino, 50019, Italy
  • 收稿日期:2001-02-03 出版日期:2001-06-24 发布日期:2001-06-24
  • 通讯作者: 唐雯霞(1934年出生),女,教授,博士生导师,从事生物无机化学研究;BERTINIIvano(1940年出生),男,教授,从事生物大分子结构研究.
  • 基金资助:

    国家自然科学基金(批准号:29731030;39870166)资助

Solution Structure of the Imidazole Complex of Cytochrome c

WU Yi-Bing1,2, LU Jun2, YAO Yong1, BAI Zhi-Ping1, TANG Wen-Xia1, ZHU De-Xi2   

  1. 1. State Key Laboratory of Coordination Chemistry;
    2. State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210093;
    2. Magnetic Resonance Center, University of Florence, Via L.Sacconi, 6 Sesto Fiorentino, 50019, Italy
  • Received:2001-02-03 Online:2001-06-24 Published:2001-06-24

关键词: 细胞色素c, NMR, 溶液结构, 电子结构

Abstract: The solution structure of the imidazole adduct of oxidized horse heart cytochrome c(Im-cyt c) has been determined through 2D NMRspectroscopy. The 35 conformers of the family show the RMSDvalues to the average structure of 0.063±0.007 nm for the backbone and 0.107±0.007 nm for all heavy atoms, respectively. The secondary structure elements and the overall folding of the present structure are substantially similar to those of the solution structure of native protein. However, the replacement of the axial ligand Met 80 with the exogenous imidazole ligand induces significant conformation changes in both backbone and side chains of the residues locating in the distal axial ligand regions. The electron delocalization on the heme moiety and the magnetic susceptibility tensor are consistent with these structural features.

Key words: Cytochrome c, NMR, Solution structure, Electronic structure

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