title: Production and characteristics of the whole-cell lipase from organic solvent tolerant Burkholderia sp. ZYB002.
abstract: The thermostable and organic solvent tolerant whole-cell lipase (WCL) was produced by Burkholderia sp. ZYB002 with broad spectrum organic solvent tolerance. The production medium of the WCL was primarily optimized, which resulted in the maximum activity of 22.8 U/mL and the 5.1-fold increase of the WCL yield. The optimized culture medium was as follows (% w/v or v/v): soybean meal 2, soybean oil 0.5, manganese sulfate 0.1, K(2)HPO(4) 0.1, olive oil 0.5, initial pH 6.0, inoculum density 2, liquid volume 35 mL in 250-mL Erlenmeyer flask, and incubation time 24 h. The biochemical characterization of the WCL from Burkholderia sp. ZYB002 was determined, and the results showed that the optimal pH and temperature for lipolytic activity of the WCL was 8.0 and 65°C, respectively. The WCL was stable at temperature up to 70°C for 1 h and retained 79.2% of its original activity. The WCL was highly stable in the pH range from 3.0 to 8.5 for 6 h. Ca(2+), K(+), Na(+), NO (3) (-) , etc. ions stimulated its lipolytic activity, whereas Zn(2+) ion caused inhibition effect. The WCL was also relatively stable in n-butanol at a final concentration of 50% (v/v) for 24 h. However, the WCL was strongly inhibited in Triton X-100 at a final concentration of 10% (v/v). The WCL with thermal resistance and organic solvent tolerance showed its great potential in various green industrial chemical processes.
authors.affiliation: Engineering Research Center of Industrial Microbiology, Ministry of Education, Fujian Normal University, Fuzhou, Fujian 350108, People's Republic of China. shuzhengyu@gmail.com
authors.forename: Zheng-Yu
authors.initials: ZY
authors.lastname: Shu
authors.forename: Ji-Guang
authors.initials: JG
authors.lastname: Wu
authors.forename: Lan-Xing
authors.initials: LX
authors.lastname: Cheng
authors.forename: De
authors.initials: D
authors.lastname: Chen
authors.forename: Yong-Mei
authors.initials: YM
authors.lastname: Jiang
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Jian-Zhong
authors.initials: JZ
authors.lastname: Huang
mesh_terms: D020001:1-Butanol / Q000737:chemistry; D001426:Bacterial Proteins / Q000302:isolation & purification / Q000378:metabolism*; D019117:Burkholderia / Q000201:enzymology* / Q000302:isolation & purification; D003470:Culture Media; D052918:Environmental Restoration and Remediation / Q000379:methods; D004795:Enzyme Stability; D005648:Fuel Oils; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008049:Lipase / Q000302:isolation & purification / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism; D012997:Solvents / Q000737:chemistry; D013379:Substrate Specificity; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D001426:Bacterial Proteins; D003470:Culture Media; D005648:Fuel Oils; D012989:Soil Pollutants; D012997:Solvents; D013501:Surface-Active Agents; D020001:1-Butanol; D008049:Lipase