Effect of Lanthanum Ion on Peroxidase in Plant

稀土学报(英文版), 2002, 20(5): 547-552.

姜慧君 ^1, , 王小锋 ^2, , 周青 ^3, , 黄晓华 ^4, , 陆天虹 ^5, , 公衍道 ^6,

1.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun 130022, China

2.Department of Chemistry, Nanjing Normal University, Nanjing 210097, China

3.School of Biotechnology, Sourthern Yangtze University, Wuxi 2140063, China

4.Department of Chemistry, Nanjing Normal University, Nanjing 210097, China;School of Biotechnology, Sourthern Yangtze University, Wuxi 2140063, China

5.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun 130022, China;Department of Chemistry, Nanjing Normal University, Nanjing 210097, China

6.State Key Laboratory of Biomembrane and Membrane Biotechnology Tsinghua University, Beijing 100084, China

基金项目: 江苏省教育厅自然科学基金(01KJB150006) Project supported by Foundation of State Planning Commission 国家自然科学基金(29973015) High and Mew Technology Committee of Jiangsu(BG2001045)

Effect of Lanthanum Ion on Peroxidase in Plant

Keywords： rare earths

The interaction of MP-11 as a model of antioxidatase enzymes with La3+ was investigated. It was found that La3+ can increase in the non-planarity of heme and the content of α helix and β turn conformations of the MP-11 molecule. The change in the secondary structure of the MP-11 molecule can increase in the exposure extent of heme to the solution. Therefore, the electrochemical reaction of MP-11 is promoted and the electrocatalytic activity to the reduction of H2O2 is increased. The results are consistent with that for the interaction of peroxidases(POD), one of the antioxidatase enzymes, obtained in the living plant experiments at low concentration of La3+.

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Effect of Lanthanum Ion on Peroxidase in Plant

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