Characterisation of a new rubredoxin isolated from Desulfovibrio desulfuricans 27774: definition of a new family of rubredoxins

FEBS Letters

LeGall, Jean²  Braga, Vera²  Gomes, Cláudio M.²  Teixeira, Miguel²  Regalla, Manuela²  Liu, Ming Y.¹  Xavier, António V.²  Pacheco, Isabel² 

[1] Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA;Instituto de Tecnologia Quı́mica e Biológica, Universidade Nova de Lisboa, Rua da Quinta Grande 6, APT 127, 2780 Oeiras, Portugal

关键词: Rubredoxin;    Rubrerythrin;    Desulfovibrio;    Electron paramagnetic resonance;    Redox property;   

DOI  :  10.1016/S0014-5793(98)00610-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

A new rubredoxin from the sulphate-reducing bacterium Desulfovibrio desulfuricans ATCC 27774, grown with nitrate as terminal electron acceptor, was isolated and characterised. The protein is an 8.5 kDa monomer containing one iron atom per molecule, with a reduction potential of 25±5 mV at pH 7.6. Like the recombinant Rdl protein from D. vulgaris, expressed in Escherichia coli [Lumpio, H.L., Shenvi, N.V., Garg, R.P., Summers, A.O. and Kurtz, D.M., J. Bacteriol. 179 (1997) 4607–4615], it contains an unusual spacing of four amino acids between the first two of the iron coordinating cysteinyl residues. This difference is reflected in the structure of the iron centre, as observed by visible and EPR spectroscopies. All together, these features make these proteins the first members of a new family of rubredoxins.

【 授权许可】

Unknown