Interaction of Cm(III) and Am(III) with human serum transferrin studied by time-resolved laser fluorescence and EXAFS spectroscopy

被引：28

作者：

Bauer, Nicole ^{[1
,2
]}

Froehlich, Daniel R. ^{[1
,2
]}

Panak, Petra J. ^{[1
,2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, D-76021 Karlsruhe, Germany

[2] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

来源：

DALTON TRANSACTIONS | 2014年 / 43卷 / 18期

关键词：

EFFECTIVE IONIC-RADII; TRIVALENT ACTINIDES; BINDING CONSTANTS; HUMAN LACTOFERRIN; CRYSTAL-STRUCTURE; HYDRATION NUMBER; COMPLEXES; SORPTION; IRON; LUMINESCENCE;

D O I：

10.1039/c3dt53371a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complexation of Cm(III) with human serum transferrin was investigated in a pH range from 3.5 to 11.0 using time-resolved laser fluorescence spectroscopy (TRLFS). At pH >= 7.4 Cm(III) is incorporated at the Fe(III) binding site of transferrin whereas at lower pH a partially bound Cm(III) transferrin species is formed. At physiological temperature (310 K) at pH 7.4, about 70% of the partially bound and 30% of the incorporated Cm(III) transferrin species are present in solution. The Cm(III) results obtained by TRLFS are in very good agreement with Am(III) EXAFS results, confirming the incorporation of Am(III) at the Fe(III) binding site at pH 8.5.

引用

页码：6689 / 6700

页数：12

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