Interconversion from 3Fe into 4Fe clusters in the presence of Desulfovibrio gigas cell extracts.

Interconversion from 3Fe into 4Fe clusters in the presence of Desulfovibrio gigas cell extracts.
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在 Desulfovibrio gigas 细胞提取物存在下,从 3Fe 相互转化为 4Fe 簇。

DOI:
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发表时间:
1984
期刊:
European Journal of Biochemistry
影响因子:
--
通讯作者:
A. V. Xavier
A. V. Xavier
中科院分区:
--
文献类型:
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作者:
J. Moura;J. Legall;A. V. Xavier

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巨硫硫弧菌铁氧还蛋白II(FdII)含有单一的3Fe簇[Huynh,B.H.,Moura,J.J.G.,Moura,I.,Kent,T.A.,Legall,J.,Xille,A.V.和Münck,E.(1980)J.Biol。化学。255、3242-3244]。在氧化状态下,蛋白质在g=2.02处表现出强烈的电子顺磁共振(EPR)信号。单电子还原时,中心变得无声。在不含酸性电子载体并辅以丙酮酸和FdII的巨藻细胞粗提物存在下,获得了典型的还原[4Fe-4S]中心的EPR信号。这一信号的出现与由氢的产生判断的磷酸碎裂反应的刺激开始相关。这些结果得到了铁氧还蛋白3Fe簇到4Fe结构的简单化学转化的发生的支持[Moura,J.J.G.,Moura,I.,Kent,T.A.,Lipscomb,J.D.,Huynh,B.H.,Legall,J.,Xille,A.V.,和Münch,E.(1982)J.Biol。化学。257,6259-6267],表明簇转换发生在接近体内情况的条件下。这种簇间相互转化是在脱硫弧菌的一些相关代谢途径的背景下讨论的。
Desulfovibrio gigas ferredoxin II (FdII) contains a single 3Fe cluster [Huynh, B.H., Moura, J.J.G., Moura, I., Kent, T.A., LeGall, J., Xavier, A.V., and Münck, E. (1980) J. Biol. Chem. 255, 3242-3244]. In the oxidized state the protein exhibits an intense electron paramagnetic resonance (EPR) signal at g = 2.02. Upon one-electron reduction the center becomes EPR silent. In the presence of D. gigas crude cell extracts, devoid of acidic electron carriers and supplemented with pyruvate and FdII, an EPR signal typical of reduced [4Fe-4S] centers is obtained. The appearance of this signal correlates with the beginning of stimulation of the phosphoroclastic reaction as judged by the production of H2. These results, supported by the occurrence of easy chemical conversion of the 3Fe cluster of D. gigas ferredoxin into 4Fe structures [Moura, J.J.G., Moura, I., Kent, T.A., Lipscomb, J.D., Huynh, B.H., LeGall, J., Xavier, A.V., and Münch, E. (1982) J. Biol. Chem. 257, 6259-6267], suggest that cluster conversion takes place in conditions close to the situation in vivo. This cluster interconversion is discussed in the context of some of the relevant metabolic pathways of Desulfovibrio spp.
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Moura,JJ;Moura,I;Kent,TA;Lipscomb,JD;Huynh,BH;LeGall,J;Xavier,AV;Münck,E
通讯作者: Münck,E
通过扩展 X 射线吸收精细结构光谱测定 Desulfovibrio gigas ferredoxin II 的 3Fe 簇的核心尺寸。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Antonio,MR;Averill,BA;Moura,I;Moura,JJ;Orme-Johnson,WH;Teo,BK;Xavier,AV
通讯作者: Xavier,AV
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Johnson,MK;Spiro,TG;Mortenson,LE
通讯作者: Mortenson,LE
来自 Azotobacter vinelandii 的 7Fe 铁氧还蛋白的结构。
DOI: --
发表时间: 1981
期刊: The Journal of biological chemistry
影响因子: --
作者:
Ghosh,D;FureyJr,W;O'Donnell,S;Stout,CD
通讯作者: Stout,CD