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• W2943746327 abstract "Abstract Lipid mobilization and transport in insects is under investigation, especially lipases and lipophorin because of their roles in energy production and transport of lipids at flying activity. The present study has been conducted to purify intracellular fat body lipase for the first time, from last larval instar of Galleria mellonella . Purification methods by combination of ammonium sulfate precipitation and gel filtration using Sephadex G-100 demonstrated that the amount of protein and the specific activity of fat body lipase were 0.008633±0.000551 mg/ml and 1.5754±0.1042 μmol/min/mg protein, respectively, with a 98.9 fold purity and recovery of 50.81%. Hence, the sephadex G-100 step was more effective in purification process. SDS-PAGE and zymogram revealed that fat body lipase showed two monomers with molecular weights of 178.8 and 62.6 kDa. Furthermore biochemical characterization of fat body lipase was carried out through testing its activities against several factors such as; different temperatures, pH ranges, metal ions and inhibitors ending by determination of their kinetic parameters with the use of p -Nitrophenyl butyrate (PNPB) as a substrate. The highest activities of enzyme were determined at the temperature ranges of 35-37°C and 37-40°C and pH ranges of 7-9 and 7–10. The partially purified enzyme showed significant stimulation by Ca 2+ , K + and Na + metal ions indicating that fat body lipase is metalloproteinase. Additionally, lipase activity was strongly inhibited by some inhibitors; phenylmethylsulfony fluoride (PMSF), ethylene-diaminetetractic acid (EDTA) and ethylene glycoltetraacetic acid (EGTA) providing an evidence of presence of serine residue and activation of enzymes by metal ions. Kinetic parameters were 301.95mM K m and 0.316 Umg −1 V max . By considering the purification of fat body lipase from larvae and using some inhibitors especially ion chelating agents, it is suggested to develop this study by using lipase inhibitors to reach a successful control of Galleria mellonella in the near future." @default.
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• W2943746327 date "2019-05-01" @default.
• W2943746327 modified "2023-09-26" @default.
• W2943746327 title "Purification and characterization of fat body lipase from the Greater Wax Moth Galleria mellonella (Lepidoptera: Pyralidae)" @default.
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• W2943746327 doi "https://doi.org/10.1101/625129" @default.
• W2943746327 hasPublicationYear "2019" @default.
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