title: Engineered Surface-Immobilized Enzyme that Retains High Levels of Catalytic Activity in Air.
abstract: In the absence of aqueous buffer, most enzymes retain little or no activity; however, "water-free" enzymes would have many diverse applications. Here, we describe the chemically precise immobilization of an enzyme on an engineered surface designed to support catalytic activity in air at ambient humidity. Covalent immobilization of haloalkane dehalogenase on a surface support displaying poly(sorbitol methacrylate) chains resulted in ∼40-fold increase in activity over lyophilized enzyme powders for the gas-phase dehalogenation of 1-bromopropane. The activity of the immobilized enzyme in air approaches 25% of the activity obtained in buffer for the immobilized enzyme. Poly(sorbitol methacrylate) appears to enhance activity by replacing protein-water interactions, thereby preserving the protein structure.
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Somayesadat
authors.initials: S
authors.lastname: Badieyan
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Qiuming
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Xingquan
authors.identifier: 0000-0002-9716-9771
authors.initials: X
authors.lastname: Zou
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Yaoxin
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Chemical and Biological Engineering, University of Wisconsin , Madison, Wisconsin 53706, United States.
authors.forename: Maggie
authors.initials: M
authors.lastname: Herron
authors.affiliation: Department of Chemical and Biological Engineering, University of Wisconsin , Madison, Wisconsin 53706, United States.
authors.forename: Nicholas L
authors.initials: NL
authors.lastname: Abbott
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
authors.forename: E Neil G
authors.identifier: 0000-0003-1713-1683
authors.initials: EN
authors.lastname: Marsh