| Literature DB >> 19804777 |
Toshio Iwasaki1, Rimma I Samoilova, Asako Kounosu, Sergei A Dikanov.
Abstract
Two-dimensional electron spin-echo envelope modulation (ESEEM) analysis of the uniformly (15)N-labeled archaeal Rieske-type [2Fe-2S] ferredoxin (ARF) from Sulfolobus solfataricus P1 has been conducted in comparison with the previously characterized high-potential protein homologs. Major differences among these proteins were found in the hyperfine sublevel correlation (HYSCORE) lineshapes and intensities of the signals in the (++) quadrant, which are contributed from weakly coupled (non-coordinated) peptide nitrogens near the reduced clusters. They are less pronounced in the HYSCORE spectra of ARF than those of the high-potential protein homologs, and may account for the tuning of Rieske-type clusters in various redox systems.Entities:
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Year: 2009 PMID: 19804777 PMCID: PMC2783746 DOI: 10.1016/j.febslet.2009.09.050
Source DB: PubMed Journal: FEBS Lett ISSN: 0014-5793 Impact factor: 4.124