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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Liquid-liquid extraction of protease from cold-adapted yeast Rhodotorula mucilaginosa L7 using biocompatible and biodegradable aqueous two-phase systems

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Lario, Luciana Daniela [1] ; Pellegrini Malpiedi, Luciana [1, 2] ; Brandao Pereira, Jorge Fernando [3] ; Sette, Lara Duraes [4] ; Pessoa-Junior, Adalberto [1]
Total Authors: 5
[1] Univ Sao Paulo, Dept Biochem & Pharmaceut Technol, Sao Paulo - Brazil
[2] Univ Nacl Rosario, Fac Ciencias Bioquim & Farmaceut, Dept Quim Fis, RA-2000 Rosario, Santa Fe - Argentina
[3] Univ Estadual Paulista, UNESP, Sch Pharmaceut Sci, Dept Bioproc & Biotechnol, Araraquara, SP - Brazil
[4] Univ Sao Paulo UNESP, Inst Biosci, Dept Biochem & Microbiol, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: SEPARATION SCIENCE AND TECHNOLOGY; v. 51, n. 1, p. 57-67, JAN 2 2016.
Web of Science Citations: 6

This work aimed to optimize the extraction of an extracellular protease produced by the cold-adapted yeast Rhodotorula mucilaginosa L7 using aqueous two-phase systems (ATPS) comprising polyethylene glycol (PEG) and sodium citrate or sodium tartrate. First, the biocompatibility of the phase forming agents was assessed. The results obtained with PEG-2000, PEG-4000, and PEG-6000 demonstrated that even at large PEG concentrations (32 wt%) the protease maintains its activity after 3 h of reaction, whereas an increase in salt concentration provokes a gradual decrease in protease stability. Subsequently, the partitioning of the protease in both types of ATPS was assessed, evaluating the effect of temperature, molecular weight, and concentration of PEG on protease purification, using two 2(3)-full factorial designs. The best partitioning conditions were obtained in PEG-6000/sodium tartrate-based ATPS, at 30oC (with a yield of 81.09 +/- 0.66% and a purification factor of 2.51 +/- 0.03). Thus, considering the biodegradable characteristics of the system, the PEG/sodium tartrate ATPS is a viable and economic low-resolution step in protease purification, with a strong potential for future industrial application. (AU)

FAPESP's process: 11/20521-0 - Extraction of monoclonal antibody fragments type scFv by aqueous two-phase micellar systems
Grantee:Luciana Pellegrini Malpiedi
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/19486-0 - Marine and Antarctic biotechnology: microbial enzymes and their applications
Grantee:Lara Durães Sette
Support type: Regular Research Grants
FAPESP's process: 12/23726-4 - "purification of proteases secreted by the psicrotroph yeast Rhodoturola mucilagionosa by aqueous two-phase systems (PEG/NaPA) and chromatographic processes"
Grantee:Luciana Daniela Lario
Support type: Scholarships in Brazil - Post-Doctorate