title: Purification and Properties of a Highly Active Organophosphorus Acid Anhydrolase from Alteromonas undina.
abstract: A highly active organophosphorus acid anhydrolase from Alteromonas undina was purified to homogeneity and found to be composed of a single polypeptide chain with a molecular weight of 53,000. With diisopropylfluorophosphate as a substrate, the purified enzyme has a specific activity of approximately 575 mumol/min/mg of protein. The enzyme has optimum activity at pH 8.0 and 55 degrees C and is stimulated by sulfhydryl reducing agents and manganese. It is capable of rapidly hydrolyzing a wide range of nerve agents and several chromogenic phosphinates.
authors.affiliation: U.S. Army Chemical and Biological Defense Agency, Edgewood Research, Development and Engineering Center, Research and Technology Directorate, Aberdeen Proving Ground, Maryland 21010-5423.
authors.forename: T C
authors.initials: TC
authors.lastname: Cheng
authors.forename: S P
authors.initials: SP
authors.lastname: Harvey
authors.forename: A N
authors.initials: AN
authors.lastname: Stroup