Calculation of the redox potentials of iron-sulfur proteins: the 2-/3-couple of [Fe4S*4Cys4] clusters in Peptococcus aerogenes ferredoxin, Azotobacter vinelandii ferredoxin I, and Chromatium vinosum high-potential iron protein.

Calculation of the redox potentials of iron-sulfur proteins: the 2-/3-couple of [Fe4S*4Cys4] clusters in Peptococcus aerogenes ferredoxin, Azotobacter vinelandii ferredoxin I, and Chromatium vinosum high-potential iron protein.
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铁硫蛋白氧化还原电位的计算:产气杆菌铁氧化还原蛋白、维氏固氮菌铁氧化还原蛋白 I 和 Chromatium v​​inosum 高电位铁蛋白中的 2-/3-对 [Fe4S*4Cys4] 簇。

DOI:
10.1021/bi00202a010
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发表时间:
1994
期刊:
影响因子:
2.9
通讯作者:
Stephens,PJ
Stephens,PJ
中科院分区:
生物学3区
文献类型:
--
作者:
Jensen,GM;Warshel,A;Stephens,PJ

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摘要:用蛋白质偶极朗之万偶极(PDLD)方法计算了铁硫蛋白产气链球菌铁氧还蛋白(PaFd)、固氮杆菌铁氧还蛋白I (/luFdl)和vinosum高电位铁蛋白(cuhiip)中[Fe4S4Cys4]簇的2-/3对氧化还原电位。这些蛋白质的结构已通过x射线晶体学测定;在PaFd的情况下,由于靠近第二簇的序列发生了变化,最近对结构进行了修订。PaFd和AvFdl的[Fe4S4Cys4]簇电位与cuhiip的[Fe4S4Cys4]簇电位之间的巨大差异已成功建模,主要源于簇附近主链酰胺基团构型的差异。PaFd和/luFdl电位之间的微小差异在PaFd簇I的情况下也得到了令人满意的模型。在PaFd中,靠近簇的溶剂偶极子是其高电位的重要因素。PaFd的两种x射线结构对PaFd的簇I产生相似的结果。相比之下,第二组的结果大不相同;由于尚不清楚的原因,最近修订的结构导致结果与实验的一致性更差。
Revised Manuscript Received June 27, 1994® abstract: Calculations of the redox potentials of the 2-/3-couples of [Fe4S4Cys4] clusters in the iron-sulfur proteinsPeptococcus aerogenes ferredoxin (PaFd), Azotobacter vinelandii ferredoxin I (/luFdl) and Chromatium vinosum high potential iron protein (CuHiPIP) based on the Protein Dipoles Langevin Dipoles (PDLD) method are reported. The structures of these proteins have been determined by X-ray crystallography; in the case of PaFd the structure has recently been revised due to a change in the sequence close to Cluster II. The large differences between the potentials of the [Fe4S4Cys4] clusters of PaFd and AvFdl and the potential of the [Fe4S4Cys4] cluster of CuHiPIP are successfully modeled and originate principally in differences in the configuration of main-chain amide groups near the clusters. The small difference between the potentials of PaFd and/luFdl is also satisfactorily modeled in the case of Cluster I of PaFd. Solvent dipoles close to the cluster in PaFd are an important contributor to its higher potential. The two X-ray structures of PaFd yield similar results for Cluster I of PaFd. In contrast, the results for Cluster II differ substantially; for reasons not yet clear, the recently revised structure leads to results in worse agreement with experiment.
高电位铁蛋白和铁氧还蛋白中 Fe 4 S 4 簇的比较。
影响因子: 11.1
作者:
C. Carter;J. Kraut;S. Freer;R. A. Alden;L. Sieker;E. Adman;L. H. Jensen
通讯作者: L. H. Jensen
DOI: --
发表时间: 1976
影响因子: 4.8
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DOI: 10.1126/science.1529353
发表时间: 1992-09-18
期刊: SCIENCE
影响因子: 56.9
作者:
GEORGIADIS, MM;KOMIYA, H;REES, DC
通讯作者: REES, DC
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DOI: 10.1016/0005-2728(90)90192-7
发表时间: 1990
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Parson,WW;Chu,ZT;Warshel,A
通讯作者: Warshel,A
以 1.9 A 分辨率精制来自 Azotobacter vinelandii 的 7 Fe 铁氧还蛋白。
DOI: 10.1016/0022-2836(89)90225-8
发表时间: 1989
影响因子: 5.6
作者:
Stout,CD
通讯作者: Stout,CD