Spectroelectrochemistry of blue copper proteins: pH and temperature dependences of the reduction potentials of five azurins
Spectroelectrochemistry of blue copper proteins: pH and temperature dependences of the reduction potentials of five azurins
复制标题
蓝铜蛋白的光谱电化学:五种天青蛋白还原电位的 pH 和温度依赖性
DOI:
10.1016/s0020-1693(00)80341-2
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发表时间:
1992
影响因子:
2.8
通讯作者:
H. Gray
中科院分区:
文献类型:
--
作者:
C. Clair;W. R. Ellis;H. Gray
The pH and temperature dependences of the reduction potentials ofAlcaligenes denitrificans(Ade),Pseudomonas aeruginosa(Pae),Alcaligenes faecalis(Afa),Alcaligenes sp.(Asp) andBordetella bronchiseptica(Bbr) azurins have been determined by spectroelectrochemistry. Potentials at pH 8.0 (25 °C, μ 0.1 M, NaPi) are: 267.0 (Ade); 291.9 (Pae); 251.5 (Afa); 278.1 (Asp); 250.3 (Bbr) mV versus NHE. The variations in the potentials with pH are interpreted in terms of interactions between the copper site and titrating histidine residues. Variations in the reduction potential of Bbr azurin with both pH and temperature indicate that the copper site is distorted significantly by a redox-linked conformational change in this protein.
影响因子:
2.9
作者:
Mino,Y;Loehr,TM;Wada,K;Matsubara,H;Sanders-Loehr,J
通讯作者:
Sanders-Loehr,J