Volume 12, number 1
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Hydrolytic and Transesterification Activities of Thermostable Lipase ITB1.1

Ridho Brilliantoro, Robby Zidny, Made Puspasari Widhiastuty and Akhmaloka*

Biochemistry Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia.

ABSTRACT: Heterologous expression of local thermostable lipase (Lipase ITB1.1) has been carried out by using pET-30a(+) vector in Escherichia coli BL21(DE3). SDS-PAGE analysis showed that the protein size is around 50 kDa. Hydrolytic activity was determined at 70 oC and pH 8 by using p-Nitrophenyl palmitate (pNPP) as substrate. The activity of partial purified enzyme was significantly increased (0.56 U/mg) compared to that the crude extract (0.25 U/mg). Lipase ITB 1.1 has highest specific activity (1.23 U/mg) at 85 oC and pH 9.5. Further, characterization of the enzyme suggested that the enzyme exhibited transesterification activity. GC-MS spectra of the reaction product indicated that the coconut oil (substrate) was converted into methyl esters. The results suggesting that Lipase ITB1.1 is potential enzyme for biodiesel production

KEYWORDS: Thermostable enzyme; Lipase; Hydrolytic; Transesterification

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Brilliantoro R, Zidny R, Widhiastuty M P, Akhmaloka. Hydrolytic and Transesterification Activities of Thermostable Lipase ITB1.1. Biosci Biotech Res Asia 2015;12(1)
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Brilliantoro R, Zidny R, Widhiastuty M P, Akhmaloka. Hydrolytic and Transesterification Activities of Thermostable Lipase ITB1.1. Biosci Biotech Res Asia 2015;12(1). Available from: https://www.biotech-asia.org/?p=4287

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