title: Purification of adenine phosphoribosyltransferase by affinity chromatography.
abstract: The purine salvage pathway enzyme adenine phosphoribosyltransferase (AMP: pyrophosphate phosphoribosyltransferase EC 2.42.7) has been purified to greater than 85% homogeneity from crude rat liver 100,000 x g supernatant in one step by affinity chromatography. The enzyme binds to an AMP-agarose column and is eluted off the column by 1 mM 5-phosphoribosyl pyrophosphate with a 50 to 80% recovery. Enzyme kinetics indicate that the mechanism of the specific elution is due to competition of the product AMP and substrate 5-phosphoribosyl pyrophosphate for the same site on the enzyme.
mesh_terms: D000228:Adenine Phosphoribosyltransferase / Q000302:isolation & purification* / Q000378:metabolism; D000818:Animals; D002846:Chromatography, Affinity; D003600:Cytosol / Q000201:enzymology; D007700:Kinetics; D008099:Liver / Q000201:enzymology*; D008970:Molecular Weight; D010430:Pentosyltransferases / Q000302:isolation & purification*; D051381:Rats
chemical_list: D010430:Pentosyltransferases; D000228:Adenine Phosphoribosyltransferase