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Gene analysis, optimized production and property of marine lipase from Bacillus pumilus B106 associated with South China Sea sponge Halichondria rugosa

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Abstract

Gene cloning, optimized production and property of marine lipase from Bacillus pumilus B106 associated with South China Sea sponge Halichondria rugosa were investigated in this paper. A lipase gene with whole ORF encoding 215 amino acids was obtained by PCR, protein domain prediction suggested that the deduced lipase belongs to α/β hydrolases family. Based on single factor Seriatim-Factorial test and Plackett–Burman experimental design, the optimal medium consisted of (per l) 12.5 ml maize oil, 5.0 g beef extract, 2.0 g PO4 3− (0.6 g KH2PO4, 1.4 g K2HPO4), 17.15 g Mg2+, 5.0 g yeast extract, 2.282 g CaCl2 and 5.0 ml Tween80 with artificial sea water. Using this optimum medium, lipase activity and cell concentration were increased by 3.54- and 1.31-fold over that of the basal medium, respectively. This lipase showed tolerance to high salinity, pH and temperature. About 10–20% methanol exhibited a stimulatory effect on the lipase activity, while activity was inhibited by 30–40% methanol, 2-propanol, DMSO, and ethanol. This study provides a valuable resource for marine lipase production and extends our understanding of the possible role of sponge-associated bacteria in the biotransformation of chemical compounds for the sponge host.

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Acknowledgments

Financial supports to Zhiyong Li from “High-Tech Research and Development Program of China” (2007AA09Z447) and “Program for New Century Excellent Talents in University (NCET), China” are gratefully acknowledged.

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Correspondence to Zhiyong Li.

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Zhang, H., Zhang, F. & Li, Z. Gene analysis, optimized production and property of marine lipase from Bacillus pumilus B106 associated with South China Sea sponge Halichondria rugosa . World J Microbiol Biotechnol 25, 1267–1274 (2009). https://doi.org/10.1007/s11274-009-0010-x

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  • DOI: https://doi.org/10.1007/s11274-009-0010-x

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