DEGRADATION OF INORGANIC POLYPHOSPHATE IN MUTANTS OF AEROBACTER AEROGENES.
Harold, F. M. (National Jewish Hospital, Denver, Colo.), and Ruth L. Harold. Degradation of inorganic polyphosphate in mutants of Aerobacter aerogenes. J. Bacteriol. 89:1262-1270. 1965.-Extracts of Aerobacter aerogenes contained two enzymes capable of degrading polyphosphate, polyphosphatase and polyphosphate kinase. By use of a suicide technique, a mutant (Pn-4) blocked in polyphosphate degradation was isolated; this mutant was found to lack polyphosphatase. The results indicate that polyphosphatase mediates the main pathway of polyphosphate degradation, and, therefore, that polyphosphate does not serve as a microbial phosphagen. A second mutant (Pn-3) exhibited transient accumulation of polyphosphate when cells were transferred to fresh growth medium. This strain was constitutive for elevated levels of polyphosphate kinase, polyphosphatase, and alkaline phosphatase; the transient accumulation of polyphosphate may be due to the shifting ratios of the biosynthetic and degradative enzymes during growth. These mutants were employed in studies on the competitive relationship between polyphosphate and nucleic acids. It was concluded that nucleic acid synthesis inhibits polyphosphate synthesis and also stimulates polyphosphate degradation.
D017766:Acid Anhydride Hydrolases; D000469:Alkaline Phosphatase; D004396:Coloring Agents; D003470:Culture Media; D021902:Enterobacter aerogenes; D005941:Glucokinase; D008660:Metabolism; D009154:Mutation; D009696:Nucleic Acids; D010600:Pharmacology; D010710:Phosphates; D010744:Phosphoric Monoester Hydrolases; D010758:Phosphorus / Q000378:metabolism*; D010759:Phosphorus Isotopes; D010770:Phosphotransferases; D017856:Phosphotransferases (Phosphate Group Acceptor); D011122:Polyphosphates; D012106:Research
D004396:Coloring Agents; D003470:Culture Media; D009696:Nucleic Acids; D010710:Phosphates; D010759:Phosphorus Isotopes; D011122:Polyphosphates; D010758:Phosphorus; D010770:Phosphotransferases; D005941:Glucokinase; D017856:Phosphotransferases (Phosphate Group Acceptor); C022424:polyphosphate kinase; D000469:Alkaline Phosphatase; D010744:Phosphoric Monoester Hydrolases; D017766:Acid Anhydride Hydrolases; C022563:endopolyphosphatase
AEROBACTER AEROGENES; ALKALINE PHOSPHATASE; EXPERIMENTAL LAB STUDY; GLUCOKINASE; METABOLISM; MUTATION; NUCLEIC ACIDS; PHARMACOLOGY; PHOSPHATASES; PHOSPHATES; PHOSPHORUS ISOTOPES; PHOSPHORUS METABOLISM; PHOSPHOTRANSFERASES