Combined use of strain construction and affinity chromatography in the rapid, high-yield purification of 6-phosphogluconate dehydrogenase from Escherichia coli
- 1 April 1979
- journal article
- research article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 138 (1) , 171-175
- https://doi.org/10.1128/jb.138.1.171-175.1979
Abstract
A rapid, high-yield method for purification of 6-phosphogluconate dehydrogenase from Escherichia coli K-12 is described. Sonic extracts prepared from heat-induced cultures of strain RW184, doubly lysogenic for the specialized transducing bacteriophage lambdacI857St68h80dgndhis and bearing a deletion of the gene for glucose 6-phosphate dehydrogenase, contained levels of 6-phosphogluconate dehydrogenase 15- to 20-fold higher than cultures of wild-type cells. Affinity chromatography on blue dextran-Sepharose with batchwise elution with 1 mM nicotinamide adenine dinucleotide phosphate affected a further 10-fold purification. Enzyme prepared in this manner was homogeneous according to electrophoresis on sodium dodecyl sulfate-polyacrylamide gels and immunoelectrophoresis using antiserum directed against it. Fructose 1,6-diphosphate is an inhibitor of enzyme activity.This publication has 17 references indexed in Scilit:
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