Effect of Lanthanum Ion on Peroxidase in Plant
来源期刊：JOURNAL OF RARE EARTHS2002年第5期
论文作者：周青 姜慧君 王小锋 陆天虹 黄晓华 公衍道
Key words：rare earths; lanthamum ion; microperoxidase-11; peroxidase; interaction;
Abstract: 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+.
周青1，姜慧君2，王小锋3，陆天虹2，黄晓华3，公衍道4
(1.School of Biotechnology, Sourthern Yangtze University, Wuxi 2140063, China;
2.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun 130022, China;
3.Department of Chemistry, Nanjing Normal University, Nanjing 210097, China;
4.State Key Laboratory of Biomembrane and Membrane Biotechnology Tsinghua University, Beijing 100084, China)
Abstract: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+.
Key words:rare earths; lanthamum ion; microperoxidase-11; peroxidase; interaction;
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