title: Structural and functional characterisation of a biohybrid material based on acetylcholinesterase and layered double hydroxides.
abstract: This work describes the use of layered double hydroxides (LDHs) for the immobilisation of acetylcholinesterase (AChE) on insulator/semiconductor solid supports. Different LDHs have been synthesised by a co-precipitation method. Afterwards, biohybrid materials based on AChE-LDH mixtures have been produced using wild and recombinant enzymes. Spectroscopic techniques have confirmed the LDH phase identity and the links created between the LDH and AChE. Spectrophotometric assays have demonstrated that most of the biohybrid materials are functional and stable. Several configurations have been used for AChE immobilisation. The highest catalytic responses have been observed when using wild enzyme and immobilising AChE-LDH mixtures on LDHs previously deposited on the solid supports. LDHs have been demonstrated to be suitable host matrices for AChE immobilisation on electrodes for the subsequent development of electrochemical biosensors.
authors.affiliation: LMU, National Institute of Research and Physical and Chemical Analysis (INRAP), 2020 Sidi Thabet, Tunisia.
authors.forename: S
authors.initials: S
authors.lastname: Hidouri
authors.forename: Z M
authors.initials: ZM
authors.lastname: Baccar
authors.forename: H
authors.initials: H
authors.lastname: Abdelmelek
authors.forename: T
authors.initials: T
authors.lastname: Noguer
authors.forename: J-L
authors.initials: JL
authors.lastname: Marty
authors.forename: M
authors.initials: M
authors.lastname: Campàs
mesh_terms: D000110:Acetylcholinesterase / Q000737:chemistry* / Q000378:metabolism*; D011232:Chemical Precipitation; D002712:Chlorides / Q000737:chemistry; D004800:Enzymes, Immobilized / Q000737:chemistry / Q000378:metabolism; D006878:Hydroxides / Q000737:chemistry*; D013053:Spectrophotometry
chemical_list: D002712:Chlorides; D004800:Enzymes, Immobilized; D006878:Hydroxides; D000110:Acetylcholinesterase