Data/hora: 22/09/2024 17:48:47

Biblioteca(s): 	Embrapa Agroindústria Tropical.	
Data corrente: 	12/01/2024	
Data da última atualização: 	12/01/2024	
Autoria: 	BRIGIDA, A. I. S.; BUARQUE, F. S.; NOGUEIRA, V. L. R.; MELO, V. M. M.; GUISÁN SEIJAS, J. M.; RIBEIRO, B. D.; GONÇALVES, L. R. B.; COELHO, M. A. Z.	
Afiliação: 	ANA IRAIDY SANTA BRIGIDA, CNPAT; FILIPE SMITH BUARQUE, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; VANESSA LÚCIA RODRIGUES NOGUEIRA, UNIVERSIDADE FEDERAL DO CEARÁ; VÂNIA MARIA MACIEL MELO, UNIVERSIDADE FEDERAL DO CEARÁ; JOSÉ MANUEL GUISÁN SEIJAS, INSTITUTE OF CATALYSIS AND PETROCHEMISTRY; BERNARDO DIAS RIBEIRO, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; LUCIANA ROCHA BARROS GONÇALVES, UNIVERSIDADE FEDERAL DO CEARÁ; MARIA ALICE ZARUR COELHO, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO.	
Título: 	Partial purification of crude lipase extract from Yarrowia lipolytica: precipitation, aqueous two-phase systems (ATPS), and immobilization methods.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Cleaner Chemical Engineering, v. 6, 11 p., art. 100105, June 2023.	
DOI: 	10.1016/j.clce.2023.100105	
Idioma: 	Inglês	
Conteúdo: 	Efforts have been concentrated on developing alternative methods of enzyme purification that are less costly and highly efficient. In this work, we evaluated three different methods for lipase purification from Yarrowia lipolytica, such as precipitation using ammonium sulfate, ethanol, or acetone; aqueous two-phase systems (ATPS) based on polyethylene glycol (PEG) and potassium phosphate; and direct immobilization. It was impossible to obtain stable precipitates of the enzyme due to the low concentration of total protein and the presence of biosurfactant produced by the microorganism. Different mixture compositions were selected for the partitioning study. Three ATPS showed selective partitioning of the target enzymes, i.e., lipase and protease migrated to opposite phases. In the ATPS composed of 13 wt% PEG-4000 and 10 wt% salts, it was possible to achieve a purification factor for lipase of 4.2. Purification by immobilization performed by lipase-lipase interactions showed three lipases of distinct sizes in the crude extract. In the immobilization method by hydrophobic supports, phenyl-agarose and butyl‑agarose were more selective in immobilizing than octyl-agarose. In the ion exchange immobilization method, only the lipases identified at 66 kDa and 41 kDa have an attraction for DEAE-agarose (anionic) and sulfopropyl-agarose (cationic) matrices.	
Palavras-Chave: 	Aqueous biphasic system; Aqueous two-phase system; Sistema aquoso bifásico; Sistema aquoso em duas fases.	
Thesaurus Nal: 	Chemical precipitation; Purification methods; Yarrowia lipolytica.	
Categoria do assunto: 	W Química e Física	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1160760/1/ART-23038.pdf	
Registro original: 	Embrapa Agroindústria Tropical (CNPAT)	
Exemplares: 	CNPAT - (17178-1) - UPC - AP - DD -  -  -  - DIS