| pubmed-article:10631604 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C0752021 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C0459471 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C1704332 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C0205750 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C2827424 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C0521115 | lld:lifeskim |
| pubmed-article:10631604 | lifeskim:mentions | umls-concept:C0057569 | lld:lifeskim |
| pubmed-article:10631604 | pubmed:issue | 6 | lld:pubmed |
| pubmed-article:10631604 | pubmed:dateCreated | 2000-2-8 | lld:pubmed |
| pubmed-article:10631604 | pubmed:abstractText | Mössbauer spectra of the oxidized [Fe4S4]3+ and the reduced [Fe4S4]2+ clusters in the high-potential iron protein I from Ectothiorhodospira halophila were measured in a temperature range from 5 K to 240 K. EPR measurements and 57Fe electron-nuclear double resonance (ENDOR) experiments were carried out with the oxidized protein. In the oxidized state the cluster has a net spin S = 1/2 and is paramagnetic. As common in [Fe4S4]3+ clusters, the Mössbauer spectrum was simulated with two species contributing equally to the absorption area: two Fe3+ atoms couple to the "ferric-ferric" pair, and one Fe2+ and one Fe3+ atom give the "ferric-ferrous pair". For the simulation of the Mössbauer spectrum, g-values were taken from EPR measurements. A-tensor components were determined by 57Fe ENDOR experiments that turned out to be a necessary source of estimating parameters independently. In order to obtain a detailed agreement of Mössbauer and ENDOR data, electronic relaxation has to be taken into account. Relaxing the symmetry condition in a way that the electric field gradient tensor does not coincide with g- and A-tensors yielded an even better agreement of experimental and theoretical Mössbauer spectra. Spin-spin and spinlattice relaxation times were estimated by pulsed EPR; the former turned out to be the dominating mechanism at T = 5 K. Relaxation times measured by pulsed EPR and obtained from the Mössbauer fit were compared and yield nearly identical values. The reduced cluster has one additional electron and has a diamagnetic (S = 0) ground state. All the four irons are indistinguishable in the Mössbauer spectrum, indicating a mixed-valence state of Fe2.5+ for each. | lld:pubmed |
| pubmed-article:10631604 | pubmed:language | eng | lld:pubmed |
| pubmed-article:10631604 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:10631604 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10631604 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:10631604 | pubmed:month | Dec | lld:pubmed |
| pubmed-article:10631604 | pubmed:issn | 0949-8257 | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:BertiniII | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:LuchinatCC | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:MincioneGG | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:ParakF GFG | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:AchterholdKK | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:DilgA WAW | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:IakovlevaOO | lld:pubmed |
| pubmed-article:10631604 | pubmed:author | pubmed-author:MentlerMM | lld:pubmed |
| pubmed-article:10631604 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:10631604 | pubmed:volume | 4 | lld:pubmed |
| pubmed-article:10631604 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:10631604 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:10631604 | pubmed:pagination | 727-41 | lld:pubmed |
| pubmed-article:10631604 | pubmed:dateRevised | 2006-11-15 | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:meshHeading | pubmed-meshheading:10631604... | lld:pubmed |
| pubmed-article:10631604 | pubmed:year | 1999 | lld:pubmed |
| pubmed-article:10631604 | pubmed:articleTitle | Simultaneous interpretation of Mössbauer, EPR and 57Fe ENDOR spectra of the [Fe4S4] cluster in the high-potential iron protein I from Ectothiorhodospira halophila. | lld:pubmed |
| pubmed-article:10631604 | pubmed:affiliation | Physik-Department E17, Technische Universität München, Garching, Germany. | lld:pubmed |
| pubmed-article:10631604 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:10631604 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:10631604 | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:10631604 | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:10631604 | lld:pubmed |
