Literature DB >> 7575454

Magnetic circular dichroism study of the selenium-substituted form (Fe3Se4) of bovine heart aconitase.

J L Breton1, J A Farrar, M C Kennedy, H Beinert, A J Thomson.   

Abstract

The selenium-substituted inactive form of mitochondrial aconitase contains one [3Fe-4Se]1+/0 cluster [Surerus, Kennedy, Beinert and Münck (1989) Proc. Natl. Acad. Sci. U.S.A. 87, 9846-9850]. This cluster was studied in both oxidized and reduced states by magnetic CD (MCD) and EPR spectroscopy. In the MCD spectra, intensity and transition wavelength shifts are observed when compared with the spectra of the native [3Fe-4S]1+/0 cluster. These changes are used to differentiate between the charge-transfer transitions originating from inorganic and cysteinyl sulphur. Using also the data from the EPR spectra, the spin ground state is assigned as S = 1/2 for the oxidized [3Fe-4Se]1+ cluster and S = 2 for the reduced [3Fe-4Se]0 cluster.

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Year:  1995        PMID： 7575454      PMCID： PMC1136138          DOI： 10.1042/bj3110197

Source DB:  PubMed          Journal:  Biochem J        ISSN： 0264-6021            Impact factor:   3.857


  28 in total

1.  Isotopic hybrids of nitrogenase. Mössbauer study of MoFe protein with selective 57Fe enrichment of the P-cluster.

Authors:  P A McLean; V Papaefthymiou; W H Orme-Johnson; E Münck
Journal:  J Biol Chem       Date:  1987-09-25       Impact factor: 5.157

2.  A novel S = 3/2 EPR signal associated with native Fe-proteins of nitrogenase.

Authors:  W R Hagen; R R Eady; W R Dunham; H Haaker
Journal:  FEBS Lett       Date:  1985-09-23       Impact factor: 4.124

3.  Selenium as an acid labile sulfur replacement in putidaredoxin.

Authors:  J C Tsibris; M J Namtvedt; I C Gunsalus
Journal:  Biochem Biophys Res Commun       Date:  1968-02-15       Impact factor: 3.575

4.  Magnetization of the oxidized and reduced three-iron cluster of Desulfovibrio gigas ferredoxin II.

Authors:  E P Day; J Peterson; J J Bonvoisin; I Moura; J J Moura
Journal:  J Biol Chem       Date:  1988-03-15       Impact factor: 5.157

5.  Azotobacter chroococcum 7Fe ferredoxin. Two pH-dependent forms of the reduced 3Fe clusters and its conversion to a 4Fe cluster.

Authors:  S J George; A J Richards; A J Thomson; M G Yates
Journal:  Biochem J       Date:  1984-11-15       Impact factor: 3.857

6.  Magnetization curves of haemoproteins measured by low-temperature magnetic-circular-dichroism spectroscopy.

Authors:  A J Thomson; M K Johnson
Journal:  Biochem J       Date:  1980-11-01       Impact factor: 3.857

7.  Characterization of the Fe-S cluster in aconitase using low temperature magnetic circular dichroism spectroscopy.

Authors:  M K Johnson; A J Thomson; A J Richards; J Peterson; A E Robinson; R R Ramsay; T P Singer
Journal:  J Biol Chem       Date:  1984-02-25       Impact factor: 5.157

8.  Spectroscopic studies of the seven-iron-containing ferredoxins from Azotobacter vinelandii and Thermus thermophilus.

Authors:  M K Johnson; D E Bennett; J A Fee; W V Sweeney
Journal:  Biochim Biophys Acta       Date:  1987-01-05

9.  Resonance Raman spectra of three-iron centers in ferredoxins from Desulfovibrio gigas.

Authors:  M K Johnson; J W Hare; T G Spiro; J J Moura; A V Xavier; J LeGall
Journal:  J Biol Chem       Date:  1981-10-10       Impact factor: 5.157

10.  Characterization of the selenium-substituted 2 [4Fe-4Se] ferredoxin from Clostridium pasteurianum.

Authors:  J M Moulis; J Meyer
Journal:  Biochemistry       Date:  1982-09-14       Impact factor: 3.162
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