Journal
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
Volume 78, Issue 2, Pages 245-254Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09168451.2014.882752
Keywords
Penicillium solitum; Cladosporium cladosporioides; lipolytic activity; alkaline lipase; lipase isoenzymes
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Funding
- Lombardy Region ECO-BRICK Project
- University of Pavia under the program Fondi per Ricerca di Ateneo (FAR)
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Two distinct extracellular lipases were obtained from Penicillium solitum 194A, isolated from domestic compost, and Cladosporium cladosporioides 194B, isolated from dairy wastewater. These alkaline enzymes had molecular masses of 42 and 30 kDa, respectively. The P. solitum 194A lipase differed in mass from previously reported enzyme, indicating that it is a novel lipase, and indicating that penicillia can secrete lipase isoenzymes. The C. cladosporioides lipase was more active on esters of medium-chain acids, whereas the P. solitum lipase was more active on longer chained substrates. The C. cladosporioides enzyme displayed higher thermal stability than the P. solitum lipase, preserving full activity up to 48 degrees C and showing a T-50 (10 min) of 60 degrees C. Their different catalytic properties and good protein stability should make these enzymes suitable for biotechnological applications. Furthermore, the combined use of these two fungal strains may prove to be valuable in lipid-rich waste management.
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