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Parodi AR, Merlo C, Córdoba A, Palopoli C, Ferreyra J, Signorella S, Ferreira ML, Magario I. Application of metal complexes as biomimetic catalysts on glycerol oxidation. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2018.11.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cui P, Dou TY, Li SY, Lu JX, Zou LW, Wang P, Sun YP, Hao DC, Ge GB. Highly selective and efficient biotransformation of linarin to produce tilianin by naringinase. Biotechnol Lett 2016; 38:1367-73. [PMID: 27146204 DOI: 10.1007/s10529-016-2116-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 04/27/2016] [Indexed: 01/14/2023]
Abstract
OBJECTIVES To develop a practical method to prepare tilianin by highly selective and efficient hydrolysis of the C-7 rhamnosyl group from linarin. RESULTS Naringinase was utilized to selectively catalyze the formation of tilianin using linarin as the starting material. The reaction conditions, including temperature, pH, metal ions, substrate concentration and enzyme concentration, were optimized. At 60 °C, naringinase showed enhanced α-L-rhamnosidase activity while the β-D-glucosidase activity was abrogated. The addition of Mg(2+), Fe(2+) and Co(2+) was also beneficial for selective biotransformation of linarin to tilianin. Under the optimized conditions (pH 7.0 at 60 °C), linarin could be nearly completely transformed to tilianin with excellent selectivity (>98.9 %), while that of the by-product acacetin was less than 1.1 %. In addition, the structure of target product tilianin was fully characterized by HR-MS and (1)H-NMR. CONCLUSION A highly selective and efficient biotransformation of linarin to tilianin was developed by the proper control of incubation temperature, which enhanced the α-L-rhamnosidase activity of naringinase and blocked its β-D-glucosidase activity.
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Affiliation(s)
- Pan Cui
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100043, China
| | - Tong-Yi Dou
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.,University of Chinese Academy of Sciences, Beijing, 100043, China
| | - Shi-Yang Li
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Jun-Xia Lu
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Li-Wei Zou
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Ping Wang
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Yan-Ping Sun
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Da-Cheng Hao
- School of Environment and Chemical Engineering, Dalian Jiaotong University, Dalian, 116028, China
| | - Guang-Bo Ge
- Laboratory of Pharmaceutical Resource Discovery, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
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Córdoba A, Magario I, Ferreira ML. Experimental design and MM2–PM6 molecular modelling of hematin as a peroxidase-like catalyst in Alizarin Red S degradation. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2011.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Naringinases: occurrence, characteristics, and applications. Appl Microbiol Biotechnol 2011; 90:1883-95. [DOI: 10.1007/s00253-011-3176-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 02/08/2011] [Accepted: 02/09/2011] [Indexed: 12/26/2022]
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Magario I, Vielhauer O, Neumann A, Hausmann R, Syldatk C. Kinetic analysis and modeling of the liquid-liquid conversion of emulsified di-rhamnolipids by Naringinase from Penicillium decumbens. Biotechnol Bioeng 2008; 102:9-19. [PMID: 18949755 DOI: 10.1002/bit.22057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The enzymatic conversion of an aggregate-forming substrate was kinetically analyzed and a model was applied for the prediction of reaction-time courses. An L-rhamnose molecule from a di-rhamnolipid is cleaved by Naringinase from Penicillium decumbens leading to a mono-rhamnolipid. Optimal reaction rates were found when both, substrate and product build large co-aggregates in a slightly acidic aqueous phase. On the other hand, reaction rates were independent of initial di-rhamnolipid concentration and this was interpreted by assuming that the reaction occurs in the aqueous phase according to Michaelis-Menten kinetics in combination with competitive L-rhamnose inhibition. Rhamnolipids were therefore assumed to be highly concentrated in aggregates, a second liquid phase, whereas diffusive rhamnolipid transport from and to the aqueous phase occurs due to the enzymatic reaction. Furthermore, ideal surfactant mixing between di- and mono-rhamnolipid was assumed for interpretation of the negative effect of the last on the reaction rate. A model was created that describes the system accordingly. The comparison of the experimental data, were in excellent agreement with the predicted values. The findings of this study may beneficially be adapted for any bioconversion involving aggregate-forming substrate and/or product being catalyzed by hydrophilic enzymes.
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Affiliation(s)
- I Magario
- Institute of Engineering in Life Sciences, Section of Technical Biology, University of Karlsruhe (TH), Engler-Bunte-Ring 1, D-76131 Karlsruhe, Germany.
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