UV-Vis Spectroscopy Study on Interaction between Microperoxidase-11 and Pr Ion Under Acid Rain Stress

稀土学报(英文版), 2002, 20(5): 541-546.

1.Department of Chemistry, Southern Yangtze University, Wuxi 214036, China

2.College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 2100976, China;College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 2100976, China

3.School of Biotechnology, Southern Yangtze University, Wuxi 2140366, China

4.College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 2100976, China

基金项目: High & New Technology of Jiang Su(BG2001045) foundation of State Planning Commission(GJX01100626) 江苏省自然科学基金(01KJB150006) 国家自然科学基金(2003005)

UV-Vis Spectroscopy Study on Interaction between Microperoxidase-11 and Pr Ion Under Acid Rain Stress

Keywords： rare earths

Interaction between rare earth ion praseodymium (Pr(Ⅲ)) and MP11 with/without hydrogen ion (H+) in different media( aqueous, phosphate buffer, physiological condition) were studied by UV-Vis spectroscopy. All the results indicate that Pr(Ⅲ) interacts with MP11, increasing the non-planarity of porphyrin periphery, leading MP11 to form two conformations when titrated by Pr(Ⅲ). Excessive Pr(Ⅲ) acts as a contaminant in living organism. H+ and Pr(Ⅲ) have antagonistic effect on MP11, suggesting that at suitable concentration under physiological conditions, Pr(Ⅲ) can be used as biomodulator in protecting plants from acid rain stress or in rehabilitating the harm.

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UV-Vis Spectroscopy Study on Interaction between Microperoxidase-11 and Pr Ion Under Acid Rain Stress

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