scholarly journals Enzymatic biodiesel synthesis from yeast oil using immobilized recombinant Rhizopus oryzae lipase

2015 ◽  
Vol 183 ◽  
pp. 175-180 ◽  
Author(s):  
Susan Hartwig Duarte ◽  
Gonzalo Lázaro del Peso Hernández ◽  
Albert Canet ◽  
Maria Dolors Benaiges ◽  
Francisco Maugeri ◽  
...  
2017 ◽  
Vol 39 ◽  
pp. 59-67 ◽  
Author(s):  
Albert Canet ◽  
M. Dolors Benaiges ◽  
Francisco Valero ◽  
Patrick Adlercreutz

2001 ◽  
Vol 86 (1) ◽  
pp. 59-70 ◽  
Author(s):  
Stefan Minning ◽  
Alicia Serrano ◽  
Pau Ferrer ◽  
Carles Solá ◽  
Rolf D. Schmid ◽  
...  

2007 ◽  
Vol 6 (1) ◽  
pp. 21 ◽  
Author(s):  
David Resina ◽  
Mónika Bollók ◽  
Narendar K Khatri ◽  
Francisco Valero ◽  
Peter Neubauer ◽  
...  

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 961 ◽  
Author(s):  
Josu López-Fernández ◽  
Juan J. Barrero ◽  
M. Dolors Benaiges ◽  
Francisco Valero

Recombinant Rhizopus oryzae lipase (mature sequence, rROL) was modified by adding to its N-terminal 28 additional amino acids from the C-terminal of the prosequence (proROL) to obtain a biocatalyst more suitable for the biodiesel industry. Both enzymes were expressed in Pichia pastoris and compared in terms of production bioprocess parameters, biochemical properties, and stability. Growth kinetics, production, and yields were better for proROL harboring strain than rROL one in batch cultures. When different fed-batch strategies were applied, lipase production and volumetric productivity of proROL-strain were always higher (5.4 and 4.4-fold, respectively) in the best case. rROL and proROL enzymatic activity was dependent on ionic strength and peaked in 200 mM Tris-HCl buffer. The optimum temperature and pH for rROL were influenced by ionic strength, but those for proROL were not. The presence of these amino acids altered lipase substrate specificity and increased proROL stability when different temperature, pH, and methanol/ethanol concentrations were employed. The 28 amino acids were found to be preferably removed by proteases, leading to the transformation of proROL into rROL. Nevertheless, the truncated prosequence enhanced Rhizopus oryzae lipase heterologous production and stability, making it more appropriate as industrial biocatalyst.


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