Abstract
Protocatechuate 3,4-dioxygenase (EC 1.13.11.3) has been purified 42-fold from 4-hydroxybenzoate-grown cells of Rhizobium trifolii TA1, where it constitutes about 2% of the cell protein. The dioxygenase has a molecular weight of 220,000, with two dissimilar sub-units of molecular weights 29,000 and 26,500, corresponding to an α4β4 composition. The enzyme is specific for protocatechuate, with a Km of 1.75×10-5 M and maximum activity at pH 9.2. Metal removal and replacement studies indicate that the enzyme contains complexed Fe3+ which is required for activity. Direct atomic absorption analysis gave 1.3–1.5 g atoms Fe3+ per mole of isolated enzyme, but correction for metal-deficient proteins suggests that the value is close to 2.
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References
Brown CM, Dilworth MJ (1975) Ammonia assimilation by Rhizobium cultures and bacteriods. J Gen Microbiol 86:39–48
Bull C, Ballou DP (1981) Purification and properties of protocatechuate 3,4-dioxygenase from Pseudomonas putida — a new iron to sub-unit stoiciometry. J Biol Chem 256:12673–12680
Chen Y-P, Glenn AR, Dilworth MJ (1983) Uptake and oxidation of aromatic substrates by Rhizobium leguminosarum MNF3841 and Rhizobium trifolii TA1. FEMS Microbiol Letters 21: 201–205
Durham DR, Stirling LA, Ornsten LN, Perry JJ (1980) Intergenic evolutionary homology revealed by the study of protocatechuate 3,4-dioxygenase from Azotobacter vinelandii. Biochemistry 19:149–155
Fujisawa H (1970) Protocatechuate 3,4-dioxygenase (Pseudomonas). In: Tabor H, Tabor CW (eds) Methods in enzymology, XVIII. Academic Press, New York, pp 526–529
Fujisawa H, Hayaishi O (1968) Protocatechuate 3,4-dioxygenase. J Biol Chem 243:2673–2681
Glenn AR, Dilworth MJ (1981) Oxidation of substrates by isolated bacteroids and free living cells of Rhizobium leguminosarum 3841. J Gen Microbiol 120:243–247
Glenn AR, Dilworth MJ (1980) The effect of metal ions on the alkaline phosphatase of Rhizobium leguminosarum. Arch Microbiol 126:251–256
Hou CT, Lillard MO, Schwartz RD (1976) Protocatechuate 3,4-dioxygenase from Acinetobacter calcoaceticus. Biochemistry 15:582–588
Laemmli UK (1970) Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature 227: 680–685
Lowry OH, Rosebrough NJ, Farr AL, Randall RJ (1951) Protein measurement with the Folin phenol reagent. J Biol Chem 193:265–275
Muthukumar G, Arumakumar A, Makadeyan A (1982) Degradation of aromatic compounds by Rhizobium spp. Plant and Soil 69:163–169
Ornstein L, Davis B (1962) Disc electrophoresis. Distillation Products Industries, Rochester, New York, USA
Parker CA, Trinick MJ, Chatel DL (1977) Rhizobia as soil and rhizosphere inhabitants. In: A treatise on dinitrogen fixation, section IV, agronomy and ecology. Wiley Publishing Company, New York, pp 311–352
Warburg O, Christian W (1939) Isolation and crystallization of proteins of the oxidative fermentation enzymes. Biochemische Zeitschrift 303:40–68
Yoshida R, Hori K, Fujiwara M, Saeki Y, Kagamiyama H, Nozaki N (1976) Non-identical subunits of protocatechuate 3,4-dioxygenase. Biochemistry 15:4048–4053
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Chen, Y.P., Dilworth, M.J. & Glenn, A.R. Aromatic metabolism in Rhizobium trifolii —protocatechuate 3,4-dioxygenase. Arch. Microbiol. 138, 187–190 (1984). https://doi.org/10.1007/BF00402117
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DOI: https://doi.org/10.1007/BF00402117