Proteins trapped in micelles
Keywords:
micelles, water, proteins, amino acidsAbstract
Phospholipids and amphiphylic detergents dispersed in an apolar solvent and limited quantities of water are spherical aggregates called reverse micelles. The aqueous center of a reverse micelle can accommodate a variety of solutes including macromolecules such as proteins. The water content in the micelle, and thus the amount of water surrounding the protein, can be changed. For over 10 years, Dr. Armando Gómez Puyou and his research group, of which I was part of, were devoted to the study of the role of water in enzyme catalysis and the functional and the structural stability of several enzymes. Due to their unique properties, we use reverse micelles to trap enzymes and investigate the relationship between catalysis and thermostability under limited water conditions. The water effect was also studied in some fundamental biological processes such as protein deamidation and folding.
References
FERNÁNDEZ-VELASCO D.A. et al., “Water requirements in monomer folding and dimerization of triosephosphate isomerase in reverse micelles. Intrinsic fluorescence of conformers related to reactivation”, Biochemistry, 1995, 34, 361-369.
GARZA-RAMOS, G., Darszon, A., Tuena de Gómez-Puyou, M. and Gómez-Puyou, A. “Catalysis and thermostability of mitochondrial F1-ATPase in toluene-phospholipid-low-water systems”, Biochemistry, 1989, 28:3177-3182.
GARZA-RAMOS, G., Tuena de Gómez-Puyou, M., Gómez-Puyou, A. and Gracy, R. W. Deamidation of triosephosphate isomerase in reverse micelles: effect of water on catalysis and molecular wear and tear. Eur. J. Biochem 208, 389-395, 1992.
GARZA-RAMOS, G et al. “Dimerization and reactivation of triosephosphate isomerase in reverse micelles”, Biochemistry, 1994, 33, 6960-6965.
GRACIA, J. “¿Qué es la espuma?”, Revista Digital Universitaria. 2014, Vol. 15, No. 5.
LEO, G., et al. “Deamidation at asparagine and glutamine as a major modification upon deterioration/aging of proteinaceous binders in mural paintings”, Anal. Chem. 2011, 83:2056-2064.
REGLA, I., Vázquez Velez, E., Cuervo Amaya, D. H., Neri, A. C. “La química del jabón y algunas aplicaciones”, Revista Digital Universitaria. 2014, Vol. 15, No. 5.
SUN, A.-Q., Yüksel, K. Ü. and Gracy, R. W. “Interactions between the catalytic centers and subunit interface of triosephosphate isomerase probed by refolding, active-site modification, and subunit Exchange”, J. Biol. Chem. 1992, 267:20168-20174.
Published
Issue
Section
License
Copyright (c) 2017 Revista Digital Universitaria

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Revista Digital Universitaria es editada por la Universidad Nacional Autónoma de México se distribuye bajo una Licencia Creative Commons Atribución-NoComercial 4.0 Internacional. Basada en una obra en http://revista.unam.mx/.