Spectroelectrochemical investigation of Azotobacter vinelandii bacterial ferritin

被引:7
作者
Huang, HQ [1 ]
Zhang, FZ
Xu, LS
Lin, QM
Huang, JW
Zeng, D
机构
[1] Xiamen Univ, Dept Biol, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Res Ctr Environm Sci, Xiamen 361005, Peoples R China
[3] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China
来源
BIOELECTROCHEMISTRY AND BIOENERGETICS | 1998年 / 44卷 / 02期
关键词
Azotobacter vinelandii; bacterial ferritin; reduction potential; electron-tunnel-heme and kinetics of iron release; spectra and mediatorless;
D O I
10.1016/S0302-4598(97)00098-6
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
Bacterial ferritin of Azotobacter vinelandii (AvBF) contains a function in accepting electrons from platinum electrode directly for complete iron release in the absence of a mediator. The reduction potentials of electron tunnels of -125, -310, and -370 mV for iron release are determined by direct spectroelectrochemical technique, which suggests which should be defined as midpoint potentials of electron-tunnel-heme on the surface of protein shell. A kinetic study for complete iron release by the electrode reduction at -600 mV fits the zero-order reaction law. (C) 1998 Elsevier Science S.A.
引用
收藏
页码:301 / 307
页数:7
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