Purification and characterization of an extracellular lipase from a novel strain Penicillium sp. DS-39 (DSM 23773)
[Display omitted] • An extracellular lipase (PEL) produced by Penicillium sp. DSM 23773 was purified. • A 129-fold purification, with a specific activity of 308.73 IU/mg, was achieved. • PEL showed high thermostability uncommon in lipases from mesophilic fungi. • PEL was stable, with activation, in...
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Veröffentlicht in: | Journal of molecular catalysis. B, Enzymatic Enzymatic, 2011-11, Vol.72 (3), p.256-262 |
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Sprache: | eng |
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• An extracellular lipase (PEL) produced by
Penicillium sp. DSM 23773 was purified. • A 129-fold purification, with a specific activity of 308.73 IU/mg, was achieved. • PEL showed high thermostability uncommon in lipases from mesophilic fungi. • PEL was stable, with activation, in organic solvents (50%, v/v) with log
P ≥ 2.0. • PEL is a potentially useful biocatalyst for various industrial applications.
A newly isolated fungal strain,
Penicillium sp. DS-39 (DSM 23773), was found to produce an inducible extracellular lipase when grown in a medium containing 1.0% (v/v) olive oil. Maximum lipase activity was obtained after 120
h of incubation at 28
°C. The lipase was purified 129-fold with a final specific activity of 308.73
IU/mg. The molecular weight of the homogeneous lipase was 43
kDa as determined by SDS-PAGE. It was optimally active at pH 5.5 and 45
°C. The lipase was most active on triolein and exhibited a broad substrate range with a preference for triacylglycerols containing long chain unsaturated fatty acids. It showed no regio-specificity for the ester bond in triolein. It was activated by Ca
2+ and Mn
2+, while significant inhibition was observed with Hg
2+ and Zn
2+. The lipase showed significant stability and activation in the presence of organic solvents with log
P
≥
2.0. These features render
Penicillium sp. DS-39 lipase (PEL) a potential biocatalyst for applications such as biodiesel production, enzymatic restructuring, by interesterification of different oils and fats, and biodegradation of oil spills in the environment. |
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ISSN: | 1381-1177 1873-3158 |
DOI: | 10.1016/j.molcatb.2011.06.013 |