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Purification and characterization of the two 6-phosphogluconate dehydrogenase species from Pseudomonas multivorans.
J Bacteriol. 1974 Dec; 120(3):1043-57.JB

Abstract

The two species of 6-phosphogluconate dehydrogenase (EC 1.1.1.43) from Pseudomonas multivorans were resolved from extracts of gluconate-grown bacteria and purified to homogeneity. Each enzyme comprised between 0.1 and 0.2% of the total cellular protein. Separation of the two enzymes, one which is specific for nicotinamide adenine dinucleotide phosphate and the other which is active with nicotinamide adenine dinucleotide or nicotinamide adenine dinucleotide phosphate was facilitated by the marked difference in their respective isoelectric points, which were at pH 5.0 and 6.9. Comparison of the subunit compositions of the two enzymes indicated that they do not share common peptide chains. The enzyme active with nicotinamide adenine dinucleotide was composed of two subunits of about 40,000 molecular weight, and the nicotinamide adenine dinucleotide phosphate-specific enzyme was composed of two subunits of about 60,000 molecular weight. Immunological studies indicated that the two enzymes do not share common antigenic determinants. Reduced nicotinamide adenine dinucleotide phosphate strongly inhibited the 6-phosphogluconate dehydrogenase active with nicotinamide adenine dinucleotide by decreasing its affinity for 6-phosphogluconate. Guanosine-5'-triphosphate had a similar influence on the nicotinamide adenine dinucleotide phosphate-specific 6-phosphogluconate dehydrogenase. These results in conjunction with other data indicating that reduced nicotinamide adenine dinucleotide phosphate stimulates the conversion of 6-phosphogluconate to pyruvate by crude bacterial extracts suggest that in P. multivorans, the relative distribution of 6-phosphogluconate into the pentose phosphate and Entner-Doudoroff pathways might be determined by the intracellular concentrations of reduced nicotinamide adenine dinucleotide phosphate and purine nucleotides.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

4154932

Citation

Lee, Y N., and T G. Lessie. "Purification and Characterization of the Two 6-phosphogluconate Dehydrogenase Species From Pseudomonas Multivorans." Journal of Bacteriology, vol. 120, no. 3, 1974, pp. 1043-57.
Lee YN, Lessie TG. Purification and characterization of the two 6-phosphogluconate dehydrogenase species from Pseudomonas multivorans. J Bacteriol. 1974;120(3):1043-57.
Lee, Y. N., & Lessie, T. G. (1974). Purification and characterization of the two 6-phosphogluconate dehydrogenase species from Pseudomonas multivorans. Journal of Bacteriology, 120(3), 1043-57.
Lee YN, Lessie TG. Purification and Characterization of the Two 6-phosphogluconate Dehydrogenase Species From Pseudomonas Multivorans. J Bacteriol. 1974;120(3):1043-57. PubMed PMID: 4154932.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Purification and characterization of the two 6-phosphogluconate dehydrogenase species from Pseudomonas multivorans. AU - Lee,Y N, AU - Lessie,T G, PY - 1974/12/1/pubmed PY - 1974/12/1/medline PY - 1974/12/1/entrez SP - 1043 EP - 57 JF - Journal of bacteriology JO - J. Bacteriol. VL - 120 IS - 3 N2 - The two species of 6-phosphogluconate dehydrogenase (EC 1.1.1.43) from Pseudomonas multivorans were resolved from extracts of gluconate-grown bacteria and purified to homogeneity. Each enzyme comprised between 0.1 and 0.2% of the total cellular protein. Separation of the two enzymes, one which is specific for nicotinamide adenine dinucleotide phosphate and the other which is active with nicotinamide adenine dinucleotide or nicotinamide adenine dinucleotide phosphate was facilitated by the marked difference in their respective isoelectric points, which were at pH 5.0 and 6.9. Comparison of the subunit compositions of the two enzymes indicated that they do not share common peptide chains. The enzyme active with nicotinamide adenine dinucleotide was composed of two subunits of about 40,000 molecular weight, and the nicotinamide adenine dinucleotide phosphate-specific enzyme was composed of two subunits of about 60,000 molecular weight. Immunological studies indicated that the two enzymes do not share common antigenic determinants. Reduced nicotinamide adenine dinucleotide phosphate strongly inhibited the 6-phosphogluconate dehydrogenase active with nicotinamide adenine dinucleotide by decreasing its affinity for 6-phosphogluconate. Guanosine-5'-triphosphate had a similar influence on the nicotinamide adenine dinucleotide phosphate-specific 6-phosphogluconate dehydrogenase. These results in conjunction with other data indicating that reduced nicotinamide adenine dinucleotide phosphate stimulates the conversion of 6-phosphogluconate to pyruvate by crude bacterial extracts suggest that in P. multivorans, the relative distribution of 6-phosphogluconate into the pentose phosphate and Entner-Doudoroff pathways might be determined by the intracellular concentrations of reduced nicotinamide adenine dinucleotide phosphate and purine nucleotides. SN - 0021-9193 UR - https://www.unboundmedicine.com/medline/citation/4154932/Purification_and_characterization_of_the_two_6_phosphogluconate_dehydrogenase_species_from_Pseudomonas_multivorans_ L2 - http://jb.asm.org/cgi/pmidlookup?view=long&pmid=4154932 DB - PRIME DP - Unbound Medicine ER -