Reduction of vanadium(V) to vanadium(IV) by NADPH, and vanadium(IV) to vanadium(III) by cysteine methyl ester in the presence of biologically relevant ligands

被引：19

作者：

Islam, Mohammad K.

Tsuboya, Chieko

Kusaka, Hiroko

Aizawa, Sen-ichi

Ueki, Tatsuya

Michibata, Hitoshi

Kanamori, Kan

机构：

[1] Toyama Univ, Fac Sci, Dept Chem, Toyama 9308555, Japan

[2] Toyama Univ, Fac Engn, Dept Mat Syst Engn & Life Sci, Toyama 9308555, Japan

[3] Hiroshima Univ, Grad Sch Sci, Dept Biol Sci, Mol Physiol Lab, Higashihiroshima 7398526, Japan

来源：

BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS | 2007年 / 1770卷 / 08期

关键词：

vanadium; ascidian; NADPH; biologically relevant ligands; reduction;

D O I：

10.1016/j.bbagen.2007.05.003

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

To better understand the mechanism of vanadium reduction in ascidians, we examined the reduction of vanadium(V) to vanadium(IV) by NADPH and the reduction of vanadium(IV) to vanadium(III) by L-cysteine methyl ester (CysME). UV-vis and electron paramagnetic resonance spectroscopic studies indicated that in the presence of several biologically relevant ligands vanadium(V) and vanadium(IV) were reduced by NADPH and CysME, respectively. Specifically, NADPH directly reduced vanadium(V) to vanadium(IV) with the assistance of ligands that have a formation constant with vanadium(IV) of greater than 7. Also, glycythistidine and glycylaspartic acid were found to assist the reduction of vanadium(IV) to vanadium(III) by CysME. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1212 / 1218

页数：7

共 64 条

[1] N-HYDROXY-ALPHA,ALPHA'-IMINODIPROPIONIC AND N-HYDROXYIMINODIACETIC ACID AS COMPLEXING AGENTS AND AN EXAMPLE FOR SELECTIVE COORDINATION OF THE VANADYL ION VO2+ IN AMAVADINE [J].