Artículos de revistas
Non-productive adsorption of bacterial β-glucosidases on lignins is electrostatically modulated and depends on the presence of fibronection type III-like domain
Fecha
2016-06-01Registro en:
Enzyme and Microbial Technology, v. 87-88, p. 1-8.
1879-0909
0141-0229
10.1016/j.enzmictec.2016.02.007
2-s2.0-84958950966
2-s2.0-84958950966.pdf
Autor
Universidade Federal do ABC (UFABC)
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
Institución
Resumen
Non-productive adsorption of cellulases onto lignins is an important mechanism that negatively affects the enzymatic hydrolysis of lignocellulose biomass. Here, we examined the non-productive adsorption of two bacterial β-glucosidases (GH1 and GH3) on lignins. The results showed that β-glucosidases can adsorb to lignins through different mechanisms. GH1 β-glucosidase adsorption onto lignins was found to be strongly pH-dependent, suggesting that the adsorption is electrostatically modulated. For GH3 β-glucosidase, the results suggested that the fibronectin type III-like domain interacts with lignins through electrostatic and hydrophobic interactions that can partially, or completely, overcome repulsive electrostatic forces between the catalytic domain and lignins. Finally, the increase of temperature did not result in the increase of β-glucosidases adsorption, probably because there is no significant increase in hydrophobic regions in the β-glucosidases structures. The data provided here can be useful for biotechnological applications, especially in the field of plant structural polysaccharides conversion into bioenergy and bioproducts.