The purification of shikimate dehydrogenase from Escherichia coli

Abstract
A procedure was developed for the purification of shikimate dehydrogenase from E. coli. Homogeneous enzyme with specific activity 1100 U/mg of protein was obtained in 21% overall yield. The subunit MW estimated by polyacrylamide-gel electrophoresis in the presence of sodium dodecyl sulfate was 32,000. The native MW estimated by gel-permeation chromatography on a TSK G2000SW column, was also 32,000, E. coli shikimate dehydrogenase is therefore a monomeric NADP-linked dehydrogenase.