Optimized extraction, identification and characterization of the mosquitocidal surface layer protein from a local bacterial isolate Lysinibacillus sphaericus Q001.

Autor: Arshad H; School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan., Gardner QA; School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan. Electronic address: annegardner80@yahoo.co.uk., Ahmad S; School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan., Bukhari SS; School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan., Akhtar M; School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan; Biological Sciences, University of Southampton, SO17 1BJ, UK.
Jazyk: angličtina
Zdroj: Protein expression and purification [Protein Expr Purif] 2024 Dec 09; Vol. 227, pp. 106639. Date of Electronic Publication: 2024 Dec 09.
DOI: 10.1016/j.pep.2024.106639
Abstrakt: Surface layer (S-layer) is an extracellular proteinous layer consisting of two-dimensional lattice. It is typically present on archaea and also found on some bacteria. S-layer proteins from some bacteria are reported to be toxic to mosquito larvae. Here, we aimed to extract and characterize the surface layer protein from a local bacterial strain named Lysinibacillus sphaericus Q001. This bacterium was isolated from Pakistan and characterized through various biochemical tests. It was identified as Lysinibacillus sphaericus through 16S rRNA ribotyping (NCBI accession no. OQ701385.1) and matrix-assisted laser desorption/ionization (MALDI) biotyping with 2.18 ± 0.059 score. The S-layer protein was extracted by both cation exchange method and guanidinium chloride extraction method. The optimized method for the extraction and purification of S-layer yielded 35 mg of protein from 1 L culture of L. sphaericus Q001. A potential S-layer protein band (120 kDa) detected by SDS-PAGE was confirmed by bottom-up proteomics i.e., in-gel tryptic digestion of the protein followed by MALDI-TOF analysis and peptide mass fingerprinting (PMF). The insecticidal bioassays revealed that S-layer protein of L. sphaericus Q001 was toxic against Aedes aegypti larvae with LC 50 value of 11 μg/ml. This shows its potential to be used as an alternative to chemical larvicides.
Competing Interests: Disclosure of potential conflicts of interest We have no competing interest to declare.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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