Download MendeleyInsight into the photodynamic mechanism and protein binding of a nitrosyl iron-sulfur [Fe 2 S 2 (NO) 4 ] 2- cluster.
Gong, W., Wu, T., Liu, Y., Jiao, S., Wang, W., Yan, W., Li, Y., Liu, Y., Zhang, Y., Wang, H.(2024) Spectrochim Acta A Mol Biomol Spectrosc 320: 124603-124603
- PubMed: 38878720
- DOI: https://doi.org/10.1016/j.saa.2024.124603
- Primary Citation of Related Structures:
8XWB - PubMed Abstract:
Iron-sulfur cluster conversion and nitrosyl modification are involved in regulating their functions and play critical roles in signaling for biological systems. Hereby, the photo-induced dynamic process of (Me 4 N) 2 [Fe 2 S 2 (NO) 4 ] was monitored using time-resolved electron paramagnetic resonance (EPR) spectra, MS spectra and cellular imaging methods. Photo-irradiation and the solvent affect the reaction rates and products. Spectroscopic and kinetic studies have shown that the process involves at least three intermediates: spin-trapped NO free radical species with a g av at 2.040, and two other iron nitrosyl species, dinitrosyl iron units (DNICs) and mononitrosyl iron units (MNICs) with g av values at 2.031 and 2.024, respectively. Moreover, the [Fe 2 S 2 (NO) 4 ] 2- cluster could bind with ferritin and decompose gradually, and a binding state of dinitrosyl iron coordinated with Cys102 of the recombinant human heavy chain ferritin (rHuHF) was finally formed. This study provides insight into the photodynamic mechanism of nitrosyl iron - sulfur clusters to improve the understanding of physiological activity.
- Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry and Key Laboratory of Energy Conversion and Storage Materials of Shanxi Provence, Institute of Molecular Science, Shanxi University, Taiyuan 030006, China.
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