Optimization of androstenedione production in an organic-aqueous two-liquid phase system

A. Staebler, A. Cruz, W. Van Der Goot, H. M. Pinheiro, J. M.S. Cabral, P. Fernandes

Resultado de pesquisarevisão de pares

35 Citações (Scopus)

Resumo

A systematic evaluation of the effect of key operational parameters on the selective cleavage of sitosterol to 4-androstene-3,17-dione (AD) with Mycobacterium sp. NRRL B-3805 in a dioctyl phthalate: aqueous buffer two-liquid phase system was performed. Of the parameters assessed, buffer composition, biomedium pH, temperature, and biomass and substrate concentration were those that mostly affected overall bioconversion rate. The optimum pH was 7.5 with Tris buffer. The highest bioconversion rate was observed at 35°C, although at 40°C bioconversion activity was virtually lost. Michaelis-Menten type kinetics adequately described the bioconversion system. Increasing biomass concentration from 10 to 70 gwet cell weight l-1 favored AD final yield, although the specific AD yield slightly decreased.

Idioma originalInglês
Páginas (de-até)19-23
Número de páginas5
RevistaJournal of Molecular Catalysis - B Enzymatic
Volume29
Número de emissão1-6
DOIs
Estado da publicaçãoPublicadas - 21 jun. 2004

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