Lipase Derived from Bacteria Isolated from The Seawater of Muara Badak, East Kalimantan
Authors
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Mulawarman Jln. Barong Tongkok No. 4 Kampus Gunung Kelua Samarinda (East Kalimantan)
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Mulawarman Jln. Barong Tongkok No. 4 Kampus Gunung Kelua Samarinda (East Kalimantan)
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Mulawarman Jln. Barong Tongkok No. 4 Kampus Gunung Kelua Samarinda (East Kalimantan)
Article Information
DOI: 10.47772/IJRISS.2025.910000271
Subject Category: Biochemistry
Volume/Issue: 9/10 | Page No: 3324-3329
Publication Timeline
Submitted: 2025-10-12
Accepted: 2025-10-19
Published: 2025-11-10
Abstract
Halophilic bacteria are extremophilic microorganisms that can optimally grow in environments with high salt concentrations. Sea water is one of the habitats of halobacteria. Isolation, characterization, and determination of the activity of crude extracts of lipase under various working conditions, the effect of metal ions, and variation of NaCl concentrations were performed. Lipase activity was determined using titrimetry. Four bacterial isolates were obtained from seawater Muara Badak, East Kalimantan, which showed fluorescent orange around the colony under UV light, with the highest activity in isolate 5 at 2.86 U/mL. The optimum working conditions of the crude extract of lipase were pH 6, temperature of 50°C, and substrate concentration of 2%.
Keywords
Lipase, Seawater bacteria, Optimum pH
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References
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