title: [Isolation and characterization of rubredoxin from Acinetobacter calcoaceticus].
abstract: Acinetobacter calcoaceticus growing on long-chain n-alkanes contains a soluble iron-sulfur protein, which corresponds in its properties to a rubredoxin. It was prepared from the 50000 X g supernatant of ultrasonically treated cells using ion exchange chromatography on DEAE cellulose and gel filtration on Sephadex G-75. The isolated protein is pure electrophoretically, but yields two bands corresponding to molecular weights of 6000 and 12000 respectively. A content of 11 acidic against 6 basic amino acids is in line with the acidic character of the protein. The absence of acid-labile sulfur, content of 4 cysteine residues and one iron atom per polypeptide chain and the typical absorption maxima at gamma = 280, 380, and 490 nm exclude the presence of a ferredoxin. Involvement of the rubredoxin in the alkane hydroxylation is discussed.
mesh_terms: D000150:Acinetobacter / Q000378:metabolism*; D000596:Amino Acids / Q000032:analysis; D005288:Ferredoxins / Q000302:isolation & purification*; D008970:Molecular Weight; D010084:Oxidation-Reduction; D012416:Rubredoxins / Q000302:isolation & purification* / Q000378:metabolism; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000596:Amino Acids; D005288:Ferredoxins; D012416:Rubredoxins
vernacular_title: Isolierung und Charakterisierung eines Rubredoxins aus Acinetobacter calcoaceticus