A genetically modified polypeptide is disclosed which comprises an amino acid sequence of phosphotriesterase (PTE) having at least twice the catalytic efficiency for a V-type nerve agent as a polypeptide which consists of the sequence as set forth in SEQ ID NO: 1, when assayed under identical conditions.

An immobilized enzyme electrode includes: an electrode; a redox enzyme that oxidizes or reduces a target molecule; and an electron carrier that performs electron transport between the electrode and the redox enzyme. The electron carrier is immobilized on the electrode via a first linker that is in a form of a chain, and the redox enzyme is immobilized on the electrode via a second linker that is longer than the first linker, the second linker being in a form of a chain.

Disclosed herein are methods for the large-scale production of a highly thermally stable acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Additionally, the expression methods disclosed herein can produce ChE preparations consisting of extract or purified forms that can be produced in high amounts and are highly thermally stable. These ChE products can be used in vitro detection, detoxification and decontamination methods.

Provided is a mutated hyperthermophilic PTE having a lactonase activity derived from a hyperthermophilic phosphotriesterase corresponding to the consensus sequence of SEQ ID NO: 1, the mutated PTE including the at least one mutation chosen amongst 55 putative positions and the mutated PTE having enhanced properties. Also provided are compositions including the mutated hyperthermophilic PTE and the uses thereof, notably as bioscavenger of organophosphate compounds or as quorum quencher of the bacteria using lactones to communicate.

This disclosure relates to polymers and polymer compositions having monomer units of polyoxometalates and monomer units comprising hydroxy-terminated molecules such as branched molecules or dendrimers and uses in degradation, decontamination, and deodorization. In certain embodiments, the hydroxy-terminated branched molecules or dendrimers comprise terminal 1,1-tris(hydroxymethyl)methyl or 1,1,1-tris(hydroxyalkyl)methyl groups. In certain embodiments, the hydroxy-terminated molecule is N,N,N-tris[tris(hydroxymethyl) methyl]-1,3,5 -benzenetricarboxamide.

A catalyst includes a bis(2-pyridylmethyl)amine-based ligand. A method of forming a catalyst, may include: reacting bis(2-pyridylmethyl)amine-based compound with a terminal azide and/or a terminal alkyne in the presence of Cu(I) to form a bis(2-pyridylmethyl)amine-based ligand. A method of using such catalysts may include neutralizing toxicity of at least one organophosphorus-based compound by reacting the organophosphorus-based compound with a bis(2-pyridylmethyl)amine-based ligand-metal complex.

The present invention relates to isolated polypeptides having organophosphorous hydrolase activity, and polynucleotides encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.

Disclosed herein are non-wild-type organophosphorus acid anhydrolases having three site mutations, methods of production, and methods of use to effectively degrade toxic chemicals such as((RS)-Propan-2-yl methylphosphonofluoridate)(Sarin) and other organophosphorus compounds. Also provided are organophosphorus acid anhydrolase mutants capable of degrading Sarin with distinct selective stereospecificity preferences differing from the wild-type organophosphorus acid anhydrolase

The present invention is directed towards a composition for decontaminating surfaces contaminated with toxic chemicals/substances, comprising at least one type of metal oxyhydroxide such as zirconium hydroxide, Zr(OH).sub.4, optionally with added water for hydration of the solid, mixed into a carrier liquid used for application to a contaminated surface.

A Schiff base compound configured to detoxify a toxic chemical agent. The toxic chemical agent includes at least one leaving group and the Schiff base compound includes an imine having at least one Lewis base and an alkyl substituent or an aryl substituent having an electron acceptor. The at least one Schiff base nitrogen is spaced way from the electron acceptor by a distance that ranges from about 200 pm to about 1000 pm.