Immobilization of alpha-naphthyl acetate esterase (ANAE) on k-carrageenan for potential biosensor application in pesticide detection

Mohamed Nageib, Adilah and Jameel, Ahmad Tariq and Ahmad, Farah (2021) Immobilization of alpha-naphthyl acetate esterase (ANAE) on k-carrageenan for potential biosensor application in pesticide detection. Materials Today: Proceedings. pp. 1-5. E-ISSN 2214-7853 (In Press)

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Abstract

In this study, alpha-naphthyl acetate esterase (ANAE) extracted from Atta (wholemeal) wheat flour and grinded wheat grains was immobilized on k-carrageenan beads that were amino-functionalized using 2% polyethyleneimine (PEI). ANAE is a plant esterase enzyme extracted from wheat, where its activity can be inhibited by organophosphate (OP) pesticide for biosensor applications. SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) was conducted for ANAE to investigate its molecular weight. ANAE in both free and immobilized states have been investigated for its protein concentration, loading efficiency, activity and reusability and optimum temperature and pH. The study showed that the relative activity of ANAE remained to be higher than 90%, up to temperature of 50C. Regardless of the source of wheat for ANEA extraction, the optimum pH for ANAE was at pH 7–9. The optimum temperature for immobilized ANAE from both sources of wheat were within 35–40 ℃, which was slightly lower than that for ANAE in free state. ANAE survived washing and activity assay for 11 cycles, regardless of wheat sources for ANAE extraction.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Alpha-naphthyl acetate esterase, Biosensor, Carrageenan, Enzyme immobilization, Organophosphate pesticide
Subjects:	Q Science > QC Physics Q Science > QD Chemistry T Technology > TP Chemical technology
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Dr Farah Binti Ahmad
Date Deposited:	03 Jan 2022 09:08
Last Modified:	03 Jan 2022 09:08
URI:	http://irep.iium.edu.my/id/eprint/95097

Available Versions of this Item

• Immobilization of alpha-naphthyl acetate esterase (ANAE) on k-carrageenan for potential biosensor application in pesticide detection. (deposited 03 Jan 2022 09:08) [Currently Displayed]
  • Immobilization of alpha-naphthyl acetate esterase (ANAE) on k-carrageenan for potential biosensor application in pesticide detection. (deposited 22 Mar 2023 15:49)

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