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Park BR, Park JY, Lee SH, Hong SJ, Jeong JH, Choi JH, Park SY, Park CS, Lee HN, Kim YM. Synthesis of improved long-chain isomaltooligosaccharide, using a novel glucosyltransferase derived from Thermoanaerobacter thermocopriae, with maltodextrin. Enzyme Microb Technol 2021; 147:109788. [PMID: 33992410 DOI: 10.1016/j.enzmictec.2021.109788] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 03/19/2021] [Accepted: 03/19/2021] [Indexed: 11/19/2022]
Abstract
Isomaltooligosaccharide (IMO), considered to be a prebiotic, reportedly has health effects, particularly in terms of digestion; however, the prebiotic effects of IMOs depend largely on the degree of polymerization. Currently, IMOs are commercially produced using transglucosidase (TG) derived from Aspergillus niger. Here, we report a novel Thermoanaerobacter thermocopriae-derived TG (TtTG) that can produce long-chain IMOs (L-IMOs) using maltodextrin as the main substrate. A putative carbohydrate-binding gene comprising carbohydrate-binding module 35 and glycoside hydrolase family 15 domain was cloned and successfully overexpressed in Escherichia coli BL21 (DE3) cells. The resulting purified recombinant enzyme (TtTG) had a molecular mass of 94 kDa. TtTG displayed an optimal pH of 4.0 (higher than that of commercial TG) and an optimal temperature of 60 °C (same as that of commercial TG). TtTG also enabled the synthesis of oligosaccharides using various saccharides, such as palatinose, kojibiose, sophorose, maltose, cellobiose, isomaltose, gentiobiose, and trehalose, which acted as specific acceptors. TtTG could also produce a medium-sized L-IMO, different from that by dextran-dextrinase and TG, from maltodextrin, as the sole substrate. Thus, the novel combination of maltodextrin and TtTG shows potential as an effective method for commercially producing L-IMOs with improved prebiotic effects.
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Affiliation(s)
- Bo-Ram Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea.
| | - Ji Yeong Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - So Hee Lee
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Seong-Jin Hong
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Ji Hye Jeong
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Ji-Ho Choi
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Shin-Yong Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Chan Soon Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Ha-Nul Lee
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Young-Min Kim
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea.
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A high-throughput method for screening of Aspergillus niger mutants with high transglycosylation activity by detecting non-fermentable reducing sugar. World J Microbiol Biotechnol 2010; 27:1519-23. [DOI: 10.1007/s11274-010-0595-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 10/13/2010] [Indexed: 11/25/2022]
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Ota M, Okamoto T, Wakabayashi H. Action of transglucosidase from Aspergillus niger on maltoheptaose and [U–13C]maltose. Carbohydr Res 2009; 344:460-5. [DOI: 10.1016/j.carres.2008.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Revised: 11/28/2008] [Accepted: 12/03/2008] [Indexed: 10/21/2022]
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Kim YM, Okuyama M, Mori H, Nakai H, Saburi W, Chiba S, Kimura A. Enzymatic synthesis of alkyl α-2-deoxyglucosides by alkyl alcohol resistant α-glucosidase from Aspergillus niger. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Thermophilic fungi are a small assemblage in mycota that have a minimum temperature of growth at or above 20 degrees C and a maximum temperature of growth extending up to 60 to 62 degrees C. As the only representatives of eukaryotic organisms that can grow at temperatures above 45 degrees C, the thermophilic fungi are valuable experimental systems for investigations of mechanisms that allow growth at moderately high temperature yet limit their growth beyond 60 to 62 degrees C. Although widespread in terrestrial habitats, they have remained underexplored compared to thermophilic species of eubacteria and archaea. However, thermophilic fungi are potential sources of enzymes with scientific and commercial interests. This review, for the first time, compiles information on the physiology and enzymes of thermophilic fungi. Thermophilic fungi can be grown in minimal media with metabolic rates and growth yields comparable to those of mesophilic fungi. Studies of their growth kinetics, respiration, mixed-substrate utilization, nutrient uptake, and protein breakdown rate have provided some basic information not only on thermophilic fungi but also on filamentous fungi in general. Some species have the ability to grow at ambient temperatures if cultures are initiated with germinated spores or mycelial inoculum or if a nutritionally rich medium is used. Thermophilic fungi have a powerful ability to degrade polysaccharide constituents of biomass. The properties of their enzymes show differences not only among species but also among strains of the same species. Their extracellular enzymes display temperature optima for activity that are close to or above the optimum temperature for the growth of organism and, in general, are more heat stable than those of the mesophilic fungi. Some extracellular enzymes from thermophilic fungi are being produced commercially, and a few others have commercial prospects. Genes of thermophilic fungi encoding lipase, protease, xylanase, and cellulase have been cloned and overexpressed in heterologous fungi, and pure crystalline proteins have been obtained for elucidation of the mechanisms of their intrinsic thermostability and catalysis. By contrast, the thermal stability of the few intracellular enzymes that have been purified is comparable to or, in some cases, lower than that of enzymes from the mesophilic fungi. Although rigorous data are lacking, it appears that eukaryotic thermophily involves several mechanisms of stabilization of enzymes or optimization of their activity, with different mechanisms operating for different enzymes.
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Affiliation(s)
- R Maheshwari
- Department of Biochemistry, Indian Institute of Science, Bangalore 560 012, India.
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Bousquet MP, Willemot RM, Monsan P, Boures E. Lipase-catalyzed α-butylglucoside lactate synthesis in organic solvent for dermo-cosmetic application. J Biotechnol 1999. [DOI: 10.1016/s0168-1656(98)00191-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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