2015
DOI: 10.1039/c5ra02641e
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A green route for the synthesis of a bitter-taste dipeptide combining biocatalysis, heterogeneous metal catalysis and magnetic nanoparticles

Abstract: The combo protease-metal catalyst-magnetic nanoparticles was used to establish a green alternative synthetic route to produce the bitter taste dipeptide Ala-Phe.

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Cited by 10 publications
(9 citation statements)
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References 66 publications
(68 reference statements)
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“…This can be obtained by the use of efficient nucleophiles and/or working in low water systems (Klein and others ), but it is necessary to stop the reaction before the rate of hydrolysis exceeds the rate of aminolysis and maximum yields may start to decrease. Another possibility to reduce hydrolysis is by favoring the precipitation of the products, as shown by Ungaro and others () for the synthesis of Z‐Ala‐Phe‐OMe starting from Z‐Ala‐OH and HCl•Phe‐OMe. The reaction was catalyzed by thermolysin at 50 °C in acetate buffer and calcium acetate to enhance the thermal stability of the enzyme, and in the presence of ammonium sulfate for promoting precipitation of the peptide product.…”
Section: Improving Proteases For Biotechnology Applicationsmentioning
confidence: 99%
“…This can be obtained by the use of efficient nucleophiles and/or working in low water systems (Klein and others ), but it is necessary to stop the reaction before the rate of hydrolysis exceeds the rate of aminolysis and maximum yields may start to decrease. Another possibility to reduce hydrolysis is by favoring the precipitation of the products, as shown by Ungaro and others () for the synthesis of Z‐Ala‐Phe‐OMe starting from Z‐Ala‐OH and HCl•Phe‐OMe. The reaction was catalyzed by thermolysin at 50 °C in acetate buffer and calcium acetate to enhance the thermal stability of the enzyme, and in the presence of ammonium sulfate for promoting precipitation of the peptide product.…”
Section: Improving Proteases For Biotechnology Applicationsmentioning
confidence: 99%
“…This method was chosen due to the high quality of the magnetic materials -spherically coated with silica -obtained with this methodology. We have been using this material as a catalyst support for metal nanoparticles [2,[12][13][14][15][16][17][18], metal complexes [19], and enzymes [20,21] to perform a large scope of reactions. All the reactions have been performed at relatively mild conditions (<373 K) because the stability of the Fe 3 O 4 @SiO 2 material upon thermal treatment has never been studied in detail.…”
Section: Development Of Magnetic Supportsmentioning
confidence: 99%
“…A TLN pode também ser utilizada como catalisador na síntese de ésteres de ciclodexina usados como material transportador de drogas terapêuticas (PEDERSEN et al, 2005), no desenvolvimentos de novos materiais inteligentes como as nanofibras peptídicas (DEBNATH; ROY; ULIJN, 2013) e peptídeos auto-organizáveis (CONTE; LAU; ULIJN, 2017). Na síntese de peptídeos, a TLN pode ser usada na obtenção de precursores de saborizantes, como o Z-Ser-Leu-OMe (ROMERO et al, 1997) e o Z-Ala-Phe-OMe (TRUSEK-HOLOWNIA, 2003b; UNGARO et al, 2015), na produção do adoçante aspartame (Asp-Phe-OMe) impedindo a formação do β-aspartame de sabor amargo como contaminante (DICOSIMO et al, 2013). Além dessas aplicações também já foi relatada sua aplicação no diagnóstico da doença causada pelo príon, pois a isoforma que causa a doença é resistente à TLN enquanto que a isoforma normal da proteína é hidrolisada rapidamente (OWEN et al, 2007).…”
Section: Termolisina Bacteriana (Tln)unclassified
“…Diante do sucesso conseguido no uso de Fe3O4@sílica-NH2 para imobilizar a α-QT pancreática bovina (LIRIA et al, 2014) -Durante esse doutorado, descrevemos um método que substitui o C/Pd pelo nanocatalisador Fe3O4@sílica-Pd que pode ser removido facilmente do meio reacional depois da hidrogenação (UNGARO et al, 2015).…”
Section: Objetivosunclassified
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