enzimas termoestáveis: fontes, produção e aplicação industrial thermostable enzymes: sources, production and industrial applications
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enzimas termoestáveis: fontes, produção e aplicação industrial thermostable enzymes: sources, production and industrial applications

;Eleni Gomes;Marcelo Andrés Umsza Guez;Natalia Martin;Roberto da Silva
greece and rome 2007 Vol. 30 pp. 136-145
95
gomes2007qumicaenzimas

Abstract

REVIEW: Living organisms encountered in hostile environments that are characterized by extreme temperatures rely on novel molecular mechanisms to enhance the thermal stability of their proteins, nucleic acids, lipids and cell membranes. Proteins isolated from thermophilic organisms usually exhibit higher intrinsic thermal stabilities than their counterparts isolated from mesophilic organisms. Although the molecular basis of protein thermostability is only partially understood, structural studies have suggested that the factors that may contribute to enhance protein thermostability mainly include hydrophobic packing, enhanced secondary structure propensity, helix dipole stabilization, absence of residues sensitive to oxidation or deamination, and increased electrostatic interactions. Thermostable enzymes such as amylases, xylanases and pectinases isolated from thermophilic organisms are potentially of interest in the optimization of industrial processes due to their enhanced stability. In the present review, an attempt is made to delineate the structural factors that increase enzyme thermostability and to document the research results in the production of these enzymes.

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DOI:
10.1590/S0100-40422007000100025
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