嗜热自养甲烷杆菌辅酶F430的扩展X射线吸收精细结构（EXAFS）研究
An extended-X-ray-absorption-fine-structure (e.x.a.f.s.) study of coenzyme F430 from Methanobacterium thermoautotrophicum.
作者信息
Diakun G P, Piggott B, Tinton H J, Ankel-Fuchs D, Thauer R K
出版信息
Biochem J. 1985 Nov 15;232(1):281-4. doi: 10.1042/bj2320281.
Abstract
Coenzyme F430 is a nickel porphinoid found in all methanogenic bacteria. Extended-X-ray-absorption-fine-structure (e.x.a.f.s.) spectra have been recorded above the nickel K-edge of coenzyme F430 and two model compounds, (5,10,15,20-tetramethylporphinato) nickel(II) and (5,10,15,20-tetramethylchlorinato)-nickel(II). The results show that the four nickel-nitrogen distances in F430 are split, with two nitrogen atoms at 0.192 nm and two at 0.210 nm.
摘要
辅酶F430是一种存在于所有产甲烷菌中的镍卟啉类化合物。已记录了辅酶F430以及两种模型化合物（5,10,15,20-四甲基卟啉合镍(II)和5,10,15,20-四甲基氯卟啉合镍(II)）在镍K边以上的扩展X射线吸收精细结构（e.x.a.f.s.）光谱。结果表明，F430中的四个镍-氮距离是分开的，两个氮原子距离为0.192纳米，另外两个为0.210纳米。
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