[Studies on the interaction between malanin and metal ions by fluorescence spectra methods].
Guang Pu Xue Yu Guang Pu Fen Xi
; 34(12): 3297-300, 2014 Dec.
Article
em Zh
| MEDLINE
| ID: mdl-25881427
ABSTRACT
A novel protein with anti-tumor activities named malanin was isolated and purified from an endemic plant in Yunnan and Guangxi provinces. Effects of copper ion, silver ion and calcium ion on malanin and apo-malanin fluorescence spectra were studied. The results showed that copper ion leads to obvious statistic quenching of malanin and apo-malanin fluorescence. The dissociation constant of them from malanin and apo-malanin were about 2.37 X 10(-4) and 2.66 X 10(-4) mol · L(-1), respectively. The silver ion did not have quenching action on malanin fluorescence, but it had statistic quenching effect on apo-malanin fluorescence, and its dissociation constant was 2.37 X 10(-4) mol · L(-1). Calcium ion did not have quenching action on malanin and apo-malanin fluorescence. It plays an important role in keeping malanin natural conformation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrometria de Fluorescência
/
Toxinas Biológicas
/
Glicoproteínas
/
Metais
País/Região como assunto:
Asia
Idioma:
Zh
Ano de publicação:
2014
Tipo de documento:
Article