高铁肌红蛋白硫化物复合物的共振拉曼光谱研究及其结构

Resonance Raman studies and structure of a sulfide complex of methemerythrin.

作者信息

Freier S M, Duff L L, Van Duyne R P, Klotz I M

出版信息

Biochemistry. 1979 Nov 27;18(24):5372-7. doi: 10.1021/bi00591a018.

Abstract

The complex of sulfide and methemerythrin has been characterized by resonance Raman spectroscopy. At pH 8.0 the complex contains two irons and one S2- at the active site. The resonance Raman spectrum of the sulfidomethemerythrin complex contains only one vibration, at 444 cm-1. This vibration is assigned to an iron-sulfide stretch. The possibility that sulfidomethemerythrin contains a mu-sulfido bridge. FeIII-S2-FeIII, analogous to the proposed mu-oxo bridge in azidomethemerythrin is discussed.

摘要

硫化物与高铁血红素的复合物已通过共振拉曼光谱进行了表征。在pH 8.0时，该复合物在活性位点含有两个铁原子和一个S2-。硫化高铁血红素复合物的共振拉曼光谱仅在444 cm-1处有一个振动。该振动被指定为铁-硫伸缩振动。讨论了硫化高铁血红素含有类似于叠氮高铁血红素中提出的μ-氧桥的μ-硫桥（FeIII-S2-FeIII）的可能性。