Quantification of intra- and extra-cellular thermophilic lipase/esterase production by Thermus sp. |
| |
Authors: | A Domínguez A Sanromán P Fuciños ML Rúa L Pastrana MA Longo |
| |
Institution: | Department of Chemical Engineering, University of Vigo, 36200 Vigo, Spain. |
| |
Abstract: | Four Thermus strains produced lipolytic activity when grown in liquid medium for 30 h at 70 degrees C. The highest total lipase/esterase activity (57 U l(-1)) was in Thermus aquaticus YT-1, followed by Thermus thermophilus HB27 and HB8 (33 and 25 U l(-1), respectively), and finally by Thermus sp. (16 U l(-1)). Extra-cellular activity was detected in T. aquaticus YT-1 and T. thermophilus HB27 (33 and 17 U l(-1)). All enzymes were stable at 80 degrees C over 30 min, and their activity towards fatty acid esters increased as substrate chain-length diminished (i.e. hydrolysis rate was up to 6-fold higher on p-nitrophenyl caproate than on laurate). |
| |
Keywords: | esterase extremophiles lipase thermophilic Thermus |
本文献已被 PubMed SpringerLink 等数据库收录! |