Abstract
Properties and regulation of anthranilate synthase from Alcaligenes eutrophus H 16 were investigated. Anthranilate synthase was partially purified from crude extracts by affinity chromatography on tryptophan-substituted Sepharose, and was used for kinetic measurements. During the purification procedure the enzyme was stabilized by 50 mM l-glutamine or during chromatography on DEAE-cellulose and Sephadex G-200 with 30% glycerol, respectively.
The glutamine dependent activity of anthranilate synthase was examined; it showed little change between pH 8.4 and pH 9.1. The Arrhenius plot was broken and the activation energy, δH, calculated therefrom amounted to 8.9 kcal/mole up to 30°C and 5.5 kcal/mole at higher temperatures. The molecular weight determined by gelfiltration on Sephadex G-200 and by sucrose density gradient centrifugation resulted in 158000 and 126000, respectively. The K m -values for the two substrates chorismate and glutamine were found to be 5 μM and 560 μM, respectively.
Anthranilate synthase was strongly inhibited by l-tryptophan; the only amino acid that affected enzyme activity. Homotropic interactions for chorismate (Hill coefficient n=1.4) were obtained in the presence of l-tryptophan. 50% inhibition were caused by 10 μM l-tryptophan at 100 μM chorismate. The inhibition with respect to l-glutamine was noncompetitive.
Anthranilate synthase was not associated to phosphoribosyl transferase and easily separable from the latter by different chromatographic methods.
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Abbreviations
- TEA:
-
triethanolamine
References
Andrews, P.: Estimation of the molecular weight of proteins by Sephadex gel-filtration. Biochem. J. 91, 222–233 (1964)
Baker, T. I., Crawford, I. P.: Anthranilate synthetase: Partial purfication and some kinetic studies on the enzyme from Escherichia coli. J. biol. Chem. 241, 5577–5584 (1966)
Bauerle, R. H., Margolin, P.: A multifunctional enzyme complex in the tryptophan pathway of Salmonella typhimurium: Comparison of polarity and pseudopolarity mutations. Cold Spr. Harb. Symp. quant. Biol. 31, 203–214 (1966)
Beisenherz, G., Bolze, H. J., Bücher, T. H., Czok, R., Barbade, K. H., Meyer-Arendt, E., Pfleiderer, G.: Diphosphofructose-Aldolase, Phosphoglyceraldehyd-Dehydrogenase, Milchsäure-Dehydrogenase, Glycerophosphat-Dehydrogenase und Pyruvat-Kinase aus Kaninchenmuskulatur in einem Arbeitsgang. Z. Naturforsch. 8B, 555–577 (1953)
Catena, A., DeMoss, R. D.: Physiological and kinetic studies with anthranilate synthetase of Bacillus alvei. J. Bact. 101, 476–482 (1970)
Cleland, W. W.: Steady state kinetics. In: The enzymes, Vol. II, 3rd ed., P. D. Boyer, ed., pp. 1–65. New York: Academic Press 1970
Cuatrecasas, P., Wilchek, M., Anfinsen, C. B.: Selective enzyme purification by affinity chromatography. Proc. nat. Acad. Sci. (Wash.) 61, 636–643 (1968)
Egan, A. F., Gibson, F.: Anthranilate synthetase and PR transferase from Aerobacter aerogenes as a protein aggregate. Biochim. biophys. Acta (Amst.) 130, 276–281 (1966)
Friedrich, C. G., Schlegel, H. G.: Aromatic amino acid biosynthesis in Alcaligenes eutrophus H 16. I. Properties and regulation of 3-deoxy-d-arabino heptulosonate 7-phosphate synthase. Arch. Microbiol. 103, 133–140 (1975)
Gaertner, F. H., DeMoss, J. A.: Purification and characterization of a multienzyme complex in the tryptophan pathway of Neurospora crassa. J. biol. Chem. 244, 2716–2725 (1969)
Gibson, F.: Chorismic acid: Purification and some chemical and physical studies. Biochem. J. 90, 256–261 (1964)
Henderson, E. J., Nagano, H., Zalkin, H., Hwang, L. H.: The anthranilate synthetase-anthranilate 5-phosphoribosyl pyrophosphate phosphoribosyltransferase aggregate. Purification of the aggregate and regulatory properties of anthranilate synthetase. J. biol. Chem. 245, 1416–1423 (1970)
Henderson, E. J., Zalkin, H.: On the composition of anthranilate synthetase-anthranilate 5-phosphoribosylpyrophosphate phosphoribosyltransferase from Salmonella typhimurium. J. biol. Chem. 264, 6891–6898 (1971)
Hütter, R., DeMoss, J. A.: Organization of the tryptophan pathway: A phylogenetic study of the fungi. J. Bact. 94, 1896–1907 (1967)
Ito, J., Yanofsky, C.: Anthranilate synthetase, an enzyme specified by the tryptophan operon of Escherichia coli: Comparative studies on the complex and the subunits. J. Bact. 97, 734–742 (1969)
Kane, J. F., Holmes, W. M., Jensen, R. A.: Metabolic interlock. The dual function of a folate pathway gene as an extraoperonic gene of tryptophan biosynthesis. J. biol. Chem. 247, 1587–1596 (1972)
Kumamoto, J., Raison, J. K., Lyons, J. M.: Temperature “breaks” in Arrhenius plots. A thermodynamic consequence of a phase change. J. theor. Biol. 31, 47–52 (1971)
Martin, R. G., Ames, B. N.: A method for determining the sedimentation behaviour of enzymes: Application to protein mixtures. J. biol. Chem. 236, 1372–1379 (1961)
Monod, J., Wyman, J., Changeux, J.-P.: On the nature of allosteric transitions: A plausible model. J. molec. Biol. 12, 88–118 (1965)
Pabst, M. J., Kuhn, J. C., Somerville, R. L.: Feedback regulation in the anthranilate aggregate from wild type and mutant strains of Escherichia coli. J. biol. Chem. 248, 901–914 (1973)
Queener, S. F., Gunsalus, I. C.: Anthranilate synthase enzyme system and complementation in Pseudomonas species. Proc. nat. Acad. Sci. (Wash.) 67, 1225–1232 (1970)
Queener, S. W., Queener, S. F., Meeks, J. R., Gunsalus, I. C.: Anthranilate synthase from Pseudomonas putida. Purification and properties of a two-component enzyme. J. biol. Chem. 248, 151–161 (1973)
Robb, F., Hutchinson, M. A., Belser, W. L.: Anthranilate synthase. Some physical kinetic properties of the enzyme from Serratia marcescens. J. biol. Chem. 246, 6908–6912 (1971)
Schlegel, H. G., Kaltwasser, H., Gottschalk, G.: Ein Submersverfahren zur Kultur wasserstoffoxydierender Bakterien: Wachstumsphysiologische Untersuchungen. Arch. Mikrobiol. 38, 209–222 (1961)
Schmit, J. C., Artz, S. W., Zalkin, H.: Chorismate mutase-prephenate dehydratase. Evidence for distinct catalytic and regulatory sites. J. biol. Chem. 245, 4019–4027 (1970)
Shiio, I., Miyajima, R., Nakagawa, M.: Regulation of aromatic amino acid biosynthesis in Brevibacterium flavum. I. Regulation of anthranilate synthase. J. Biochem. 72, 1447–1455 (1972)
Wegman, J., Crawford, I. P.: Tryptophan synthetic pathway and its regulation in Chromobacterium violaceum. J. Bact. 95, 2325–2335 (1968)
Zalkin, H.: Anthranilate synthetase. In: Advances in enzymology, A. Meister, ed., Vol. 38, pp. 1–39. New York: Wiley 1973
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Friedrich, C.G., Friedrich, B. & Schlegel, H.G. Aromatic amino acid biosynthesis in Alcaligenes eutrophus H 16 . Arch. Microbiol. 107, 125–131 (1976). https://doi.org/10.1007/BF00446831
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DOI: https://doi.org/10.1007/BF00446831