title: A heat-stable nicotinamide-adenine dinucleotide glycohydrolase from Pseudomonas putida KB1. Partial purification and some properties of the enzyme and an inhibitory protein.
abstract: A thermostable NAD(P)(+) glycohydrolase (EC 3.2.2.6) detected in cell-free extracts of Pseudomonas putida KB1 was purified to a single component on polyacrylamide-gel electrophoresis. A heat-labile inhibitor of the enzyme was also partially purified. Enzyme free of inhibitor is present in culture supernatants. After an ultrasonic treatment enzyme-inhibitor complex and excess of inhibitor are present in both the cell-debris and soluble fractions. The general properties of the enzyme and inhibitor are described. The molecular weights of enzyme, inhibitor and enzyme-inhibitor complex, determined by gel filtration are about 23500, 15000 and 35000 respectively. The binding of inhibitor and enzyme is inhibited by the presence of substrate.
mesh_terms: D002474:Cell-Free System; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004355:Drug Stability; D004591:Electrophoresis, Polyacrylamide Gel; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D008970:Molecular Weight; D009699:N-Glycosyl Hydrolases / Q000037:antagonists & inhibitors / Q000302:isolation & purification*; D009243:NAD; D010710:Phosphates; D011188:Potassium; D011549:Pseudomonas / Q000201:enzymology*; D013696:Temperature; D014465:Ultrasonics
chemical_list: D010710:Phosphates; D009243:NAD; D009699:N-Glycosyl Hydrolases; D011188:Potassium