| 人锰超氧化物歧化酶的紫外可见吸收光谱研究 |
| Investigation of UV-Visible Absorption Spectra of Recombinant Human Manganese Superoxide Dismutase |
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| 摘要: 研究了重组人锰超氧化物歧化酶(MnSOD)的紫外可见吸收光谱。经光学电负性和摩尔吸收系数分析,重新归属了酶中 Mn(Ⅲ)的可见光谱,首次报道了酶中Mn(Ⅱ)的电荷转移光谱。研究表明,MnSOD中显示的电荷转移谱带全部是由His咪唑基π轨道向金属轨道的LMCT跃迁。 |
| 关键词: 锰超氧化物歧化酶 紫外可见光谱 电荷转移光谱 光学电负性 |
| 基金项目: |
| Abstract: The UV-visible absorption spectra of recombinant human manganese superoxide dismutase (MnSOD) were investigated. The visible absorption spectrum of Mn(Ⅲ) was assigned anew and the charge transfer spectrum of Mn(Ⅱ) in MnSOD was first reported according to the optical electronegativity and mole absorption coefficient of MnSOD. These results have shown that all the charge transfer spectra displayed in MnSOD are attributed to the ligand metal charge transfer spectra (LMCT) from the π orbitals of imidazole of histidine to metal orbitals. |
| Keywords: manganese superoxide dismutase UV-visible spectra charge transfer spectra optical electronegativity |
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| 李连之,欧阳砥,邱晓航,胡绪英,周永洽,申泮文.人锰超氧化物歧化酶的紫外可见吸收光谱研究[J].无机化学学报,2002,18(7):688-692. |
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