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Abstract:

The stabilization of the restriction enzyme EcoRI by its incorporation into aqueous glass-forming carbohydrate or polymer solutions, followed by vacuum-drying to low moisture, has been studied. Glass-forming solutes included trehalose, sucrose, lactose, maltose, raffinose, maltodextrin DE 10, and poly(vinylpyrrolidone) (molecular weight 40 000, PVP). Among the solutes examined, trehalose and sucrose protected the enzyme most effectively during storage at 37 and 45 °C. The restriction enzyme dried with trehalose or sucrose maintained its activity without detectable loss for at least 20 days at 37 °C and 12 days at 45 °C. In contrast, the activity of the enzyme dried with maltodextrin or PVP was reduced during vacuum desiccation and also it decreased remarkably during storage at the same temperatures. Stored (37/45 °C) vacuum-dried trehalose and sucrose systems were either a dense paste or a very viscous syrup, and this indicated that they were not glassy. Moreover, no relationship was found between the glass transition temperatures (T(g)) of the pure added solute and enzyme protection during storage, since, e.g., sucrose which has significantly lower T(g) values protected the enzyme much better than either maltose, lactose, maltodextrin, or PVP. The trisaccharide raffinose offered good protection of enzyme activity, and its role as a novel excipient matrix for labile enzyme stabilization deserves further investigation. The stability of enzyme EcoRI was rapidly lost when the vacuum-dried trehalose and sucrose systems were humidified to 58% relative humidity and stored at 45 °C, and this was attributed to disaccharide crystallization. The stabilization of the restriction enzyme EcoRI by its incorporation into aqueous glass-forming carbohydrate or polymer solutions, followed by vacuum-drying to low moisture, has been studied. Glass-forming solutes included trehalose, sucrose, lactose, maltose, raffinose, maltodextrin DE 10, and poly(vinylpyrrolidone) (molecular weight 40 000, PVP). Among the solutes examined, trehalose and sucrose protected the enzyme most effectively during storage at 37 and 45 °C. The restriction enzyme dried with trehalose or sucrose maintained its activity without detectable loss for at least 20 days at 37 °C and 12 days at 45 °C. In contrast, the activity of the enzyme dried with maltodextrin or PVP was reduced during vacuum desiccation and also it decreased remarkably during storage at the same temperatures. Stored (37/45 °C) vacuum-dried trehalose and sucrose systems were either a dense paste or a very viscous syrup, and this indicated that they were not glassy. Moreover, no relationship was found between the glass transition temperatures (Tg) of the pure added solute and enzyme protection during storage, since, e.g., sucrose which has significantly lower Tg values protected the enzyme much better than either maltose, lactose, maltodextrin, or PVP. The trisaccharide raffinose offered good protection of enzyme activity, and its role as a novel excipient matrix for labile enzyme stabilization deserves further investigation. The stability of enzyme EcoRI was rapidly lost when the vacuum-dried trehalose and sucrose systems were humidified to 58% relative humidity and stored at 45 °C, and this was attributed to disaccharide crystallization.

Registro:

Documento: Artículo
Título:Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes
Autor:Rossi, S.; Buera, M.P.; Moreno, S.; Chirife, J.
Ciudad:New York, NY, United States
Filiación:Departamento de Industrias, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Aromatic polymers; Atmospheric humidity; Catalyst activity; Crystallization; Glass transition; Polysaccharides; Sugar (sucrose); Vacuum applications; Viscosity of liquids; Enzyme stabilization; Lactose; Maltodextrin; Maltose; Polyvinylpyrrolidone; Raffinose; Trehalose; Vacuum desiccation; Enzymes; glass; glycerol; raffinose; sucrose; trehalose; type II site specific deoxyribonuclease; article; chemistry; desiccation; enzyme stability; methodology; temperature; Deoxyribonuclease EcoRI; Desiccation; Enzyme Stability; Glass; Glycerol; Raffinose; Sucrose; Temperature; Trehalose
Año:1997
Volumen:13
Número:5
Página de inicio:609
Página de fin:616
DOI: http://dx.doi.org/10.1021/bp970061+
Título revista:Biotechnology Progress
Título revista abreviado:BIOTECHNOL. PROG.
ISSN:87567938
CODEN:BIPRE
CAS:Deoxyribonuclease EcoRI, EC 3.1.21.-; Glycerol, 56-81-5; Raffinose, 512-69-6; Sucrose, 57-50-1; Trehalose, 99-20-7
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_87567938_v13_n5_p609_Rossi

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Citas:

---------- APA ----------
Rossi, S., Buera, M.P., Moreno, S. & Chirife, J. (1997) . Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes. Biotechnology Progress, 13(5), 609-616.
http://dx.doi.org/10.1021/bp970061+
---------- CHICAGO ----------
Rossi, S., Buera, M.P., Moreno, S., Chirife, J. "Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes" . Biotechnology Progress 13, no. 5 (1997) : 609-616.
http://dx.doi.org/10.1021/bp970061+
---------- MLA ----------
Rossi, S., Buera, M.P., Moreno, S., Chirife, J. "Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes" . Biotechnology Progress, vol. 13, no. 5, 1997, pp. 609-616.
http://dx.doi.org/10.1021/bp970061+
---------- VANCOUVER ----------
Rossi, S., Buera, M.P., Moreno, S., Chirife, J. Stabilization of the restriction enzyme EcoRI dried with trehalose and other selected glass-forming solutes. BIOTECHNOL. PROG. 1997;13(5):609-616.
http://dx.doi.org/10.1021/bp970061+