Assessment of acetylcholinesterase (AChE) from Oreochromis mossambicus (Cuvier, 1831) as a source of enzyme for insecticides detection
AbstractIn this work we assess the potential of acetylcholinesterase (AChE) from Oreochromis mossambicus (Toman) as a sensitive test for the presence of insecticides. The partial purification and characterization of a soluble AChE from Oreochromis mossambicus brain tissues using affinity chromatography gel (procainamide–Sephacryl S-1000) showed that the partially purified AChE was most active on acetylthiocholine (ATC) but had low activities on propionylthiocholine (PTC) and butyrylthiocholine (BTC), indicating that the partially purified fraction was predominantly AChE. Soluble AChE was partially purified 9.27-fold with a 91.12% yield. The partially purified AChE displayed the highest activity on ATC at pH 7 and at 30oC using 0.1 M Tris buffer. The enzyme exhibited Michaelis-Menten kinetic constants, Km, for ATC, BTC and PTC at 36, 77 and 250 µM, respectively, and the maximum velocities, Vmax, were 18.75, 0.12 and 0.05 µmol/min/mg protein, respectively. Moreover, the AChE from Oreochromis mossambicus presented comparable sensitivity to carbamates and organophosphates insecticides than that from Electrophorus electricus and many other fish AChE by comparing half maximal inhibitory concentration values. Therefore, the enzyme is a valuable source for insecticides detection in Malaysian waters at lower cost.
How to Cite
MUHAMMAD, Umar Abubakar et al. Assessment of acetylcholinesterase (AChE) from Oreochromis mossambicus (Cuvier, 1831) as a source of enzyme for insecticides detection. Bioremediation Science and Technology Research, [S.l.], v. 4, n. 2, p. 11-17, dec. 2016. ISSN 2289-5892. Available at: <http://journal.hibiscuspublisher.com/index.php/BSTR/article/view/370>. Date accessed: 21 sep. 2018.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).