UV-Vis Spectroscopy Study on Interaction between Microperoxidase-11 and Pr Ion Under Acid Rain Stress
来源期刊：JOURNAL OF RARE EARTHS2002年第5期
论文作者：周青 吉红念 陆天虹 黄晓华
Key words：rare earths; praseodymium; microperoxidase-11; UV-Vis spectroscopy; acid rain stress; antagonistic effect;
Abstract: 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.
周青1，吉红念2，陆天虹3，黄晓华3
(1.School of Biotechnology, Southern Yangtze University, Wuxi 2140366, China;
2.Department of Chemistry, Southern Yangtze University, Wuxi 214036, China;
3.College of Chemistry and Environment Science, Nanjing Normal University, Nanjing 2100976, China)
Abstract: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.
Key words:rare earths; praseodymium; microperoxidase-11; UV-Vis spectroscopy; acid rain stress; antagonistic effect;
【全文内容正在添加中】
