title: Expression of the Solfolobus acidocaldarius Rieske iron sulfur protein II (SOXF) with the correctly inserted [2FE-2S] cluster in Escherichia coli.
abstract: The Rieske protein II (Schmidt et al., 1996, FEBS Lett. 388, 43-46) from the thermoacidophilic crenarcheon Sulfolobus acidocaldarius (DSM 639) was expressed in E. coli cells. The full length protein was strictly bound to the E. coli membranes and could only be removed by detergent treatment indicating the presence of a membrane anchor. The iron sulfur cluster was correctly inserted into a fraction of the full length protein and much more effectively into a soluble form created by the deletion of the 45 N-terminal amino acids. The soluble form of the protein displayed the typical spectroscopic properties of a respiratory Rieske protein. The midpoint potential was +375 mV determined by CD redox potentiometry. The presented data demonstrate that the structure of the recombinant protein is very similar or identical to the authentic protein making this a powerful model system for the studies of Rieske proteins by site directed mutagenesis.
authors.affiliation: Institut für Biochemie, Medizinische Universität zu Lübeck, Germany.
authors.forename: C L
authors.initials: CL
authors.lastname: Schmidt
authors.forename: O M
authors.initials: OM
authors.lastname: Hatzfeld
authors.forename: A
authors.initials: A
authors.lastname: Petersen
authors.forename: T A
authors.initials: TA
authors.lastname: Link
authors.forename: G
authors.initials: G
authors.lastname: Schäfer
mesh_terms: D000595:Amino Acid Sequence; D002942:Circular Dichroism; D017931:DNA Primers; D004563:Electrochemistry; D004578:Electron Spin Resonance Spectroscopy; D014450:Electron Transport Complex III; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics; D015870:Gene Expression; D007506:Iron-Sulfur Proteins / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D009154:Mutation; D010084:Oxidation-Reduction; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification; D017384:Sequence Deletion; D013053:Spectrophotometry; D016945:Sulfolobus acidocaldarius / Q000737:chemistry*
chemical_list: D017931:DNA Primers; D007506:Iron-Sulfur Proteins; D011994:Recombinant Proteins; C037989:Rieske iron-sulfur protein; D014450:Electron Transport Complex III