1
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Molecular weight, chain length distribution and long-term retrogradation of cassava starch modified by amylomaltase. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Research progresses on enzymatic modification of starch with 4-α-glucanotransferase. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Mondal S, Mondal K, Halder SK, Thakur N, Mondal KC. Microbial Amylase: Old but still at the forefront of all major industrial enzymes. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Krusong K, Ismail A, Wangpaiboon K, Pongsawasdi P. Production of Large-Ring Cyclodextrins by Amylomaltases. Molecules 2022; 27:molecules27041446. [PMID: 35209232 PMCID: PMC8875642 DOI: 10.3390/molecules27041446] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 02/10/2022] [Accepted: 02/18/2022] [Indexed: 02/01/2023] Open
Abstract
Amylomaltase is a well-known glucan transferase that can produce large ring cyclodextrins (LR-CDs) or so-called cycloamyloses via cyclization reaction. Amylomaltases have been found in several microorganisms and their optimum temperatures are generally around 60–70 °C for thermostable amylomaltases and 30–45 °C for the enzymes from mesophilic bacteria and plants. The optimum pHs for mesophilic amylomaltases are around pH 6.0–7.0, while the thermostable amylomaltases are generally active at more acidic conditions. Size of LR-CDs depends on the source of amylomaltases and the reaction conditions including pH, temperature, incubation time, and substrate. For example, in the case of amylomaltase from Corynebacterium glutamicum, LR-CD productions at alkaline pH or at a long incubation time favored products with a low degree of polymerization. In this review, we explore the synthesis of LR-CDs by amylomaltases, structural information of amylomaltases, as well as current applications of LR-CDs and amylomaltases.
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Affiliation(s)
- Kuakarun Krusong
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Phyathai Rd., Patumwan, Bangkok 10330, Thailand; (A.I.); (K.W.)
- Correspondence: ; Tel.: + 66-(0)2-218-5413
| | - Abbas Ismail
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Phyathai Rd., Patumwan, Bangkok 10330, Thailand; (A.I.); (K.W.)
| | - Karan Wangpaiboon
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Phyathai Rd., Patumwan, Bangkok 10330, Thailand; (A.I.); (K.W.)
| | - Piamsook Pongsawasdi
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Phyathai Rd., Patumwan, Bangkok 10330, Thailand;
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5
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Liu Y, Qiu C, Li X, McClements DJ, Wang C, Zhang Z, Jiao A, Long J, Zhu K, Wang J, Jin Z. Application of starch-based nanoparticles and cyclodextrin for prebiotics delivery and controlled glucose release in the human gut: a review. Crit Rev Food Sci Nutr 2022; 63:6126-6137. [PMID: 35040740 DOI: 10.1080/10408398.2022.2028127] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Starches are a major constituent of staple foods and are the main source of energy in the human diet (55-70%). In the gastrointestinal tract, starches are hydrolyzed into glucose by α-amylase and α-glucosidase, which leads to a postprandial glucose elevation. High levels of blood glucose levels over sustained periods may promote type 2 diabetes mellitus (T2DM) and obesity. Increasing consumption of starchy foods with a lower glycemic index may therefore contribute to improved health. In this paper, the preparation and properties of several starch-based nanoparticles (SNPs) and cyclodextrins (CDs) derivatives are reviewed. In particular, we focus on the various mechanisms responsible for the ability of these edible nanomaterials to modulate glucose release and the gut microbiome in the gastrointestinal tract. The probiotic functions are achieved through encapsulation and protection of prebiotics or bioactive components in foods or the human gut. This review therefore provides valuable information that could be used to design functional foods for improving human health and wellbeing.
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Affiliation(s)
- Yuwan Liu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Chao Qiu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Xiaojing Li
- College of Light Industry and Food Engineering, Nanjing Forestry University, Jiangsu, China
| | | | - Chenxi Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Zhiheng Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Aiquan Jiao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Jie Long
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Kunfu Zhu
- Shandong Zhushi Pharmaceutical Group Co., LTD, Heze, China
| | - Jinpeng Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China-Canada Joint Lab of Food Nutrition and Health (Beijing), School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
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6
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Suksiri P, Ismail A, Sirirattanachatchawan C, Wangpaiboon K, Muangsin N, Tananuwong K, Krusong K. Enhancement of large ring cyclodextrin production using pretreated starch by glycogen debranching enzyme from Corynebacterium glutamicum. Int J Biol Macromol 2021; 193:81-87. [PMID: 34678383 DOI: 10.1016/j.ijbiomac.2021.10.082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/19/2022]
Abstract
Synthesis of large-ring cyclodextrins (LR-CDs) in any significant amount has been challenging. This study enhanced the LR-CDs production by Thermus filiformis amylomaltase (TfAM) enzyme by starch pretreatment using glycogen debranching enzyme from Corynebacterium glutamicum (CgGDE). CgGDE pretreated tapioca starch gave LR-CD conversion of 31.2 ± 2.2%, compared with LR-CDs produced from non-treated tapioca starch (16.0 ± 2.4%). CgGDE pretreatment enhanced amylose content by approximately 30%. Notably, a shorter incubation time of 1 h is sufficient for CgGDE starch pretreatment to produce high LR-CD yield, compared with 6 h required for the commercial isoamylase. High-Performance Anion Exchange Chromatography coupled with Pulsed Amperometric Detection (HPAEC-PAD) and Gel Permeable Chromatography (GPC) revealed that CgGDE is more efficient than the commercial isoamylase in debranching tapioca starch and gave lower molecular weight products. In addition, lower amount of by-products (linear oligosaccharides) were detected in cyclization reaction when using CgGDE-pretreated starch. In conclusion, CgGDE is a highly effective enzyme to promote LR-CD synthesis from starch with a shorter incubation time than the commercial isoamylase.
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Affiliation(s)
- Pornchanok Suksiri
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Program of Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Abbas Ismail
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Chay Sirirattanachatchawan
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Program of Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Karan Wangpaiboon
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nongnuj Muangsin
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kanitha Tananuwong
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kuakarun Krusong
- Structural and Computational Biology Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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7
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Dong Z, Yang S, Dong X, Yang Y, Yan X, Su J, Tang C, Yao L, Kan Y. Characteristics, Protein Engineering, Heterologous Production, and Industrial Applications of Microbial Isoamylases. STARCH-STARKE 2021. [DOI: 10.1002/star.202100192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zixing Dong
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Shuangshuang Yang
- College of Physical Education Nanyang Normal University Nanyang 473061 China
| | - Xiaoxiao Dong
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Yongna Yang
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Xueting Yan
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Jiejie Su
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
| | - Cunduo Tang
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- China‐UK‐NYNU‐RRes Joint Laboratory of Insect Biology Henan Key Laboratory of Insect Biology in Funiu Mountain Nanyang Normal University Nanyang Henan 473061 China
| | - Lunguang Yao
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- Henan Key Laboratory of Ecological Security for Water Region of Mid‐line of South‐to‐North Nanyang Normal University Nanyang 473061 China
| | - Yunchao Kan
- Henan Provincial Engineering Laboratory of Insect Bio‐reactor College of Life Science and Agricultural Engineering Nanyang Normal University Nanyang 473061 China
- China‐UK‐NYNU‐RRes Joint Laboratory of Insect Biology Henan Key Laboratory of Insect Biology in Funiu Mountain Nanyang Normal University Nanyang Henan 473061 China
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Harvey DJ. ANALYSIS OF CARBOHYDRATES AND GLYCOCONJUGATES BY MATRIX-ASSISTED LASER DESORPTION/IONIZATION MASS SPECTROMETRY: AN UPDATE FOR 2015-2016. MASS SPECTROMETRY REVIEWS 2021; 40:408-565. [PMID: 33725404 DOI: 10.1002/mas.21651] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 07/24/2020] [Indexed: 06/12/2023]
Abstract
This review is the ninth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2016. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation and arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Much of this material is presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented over 30 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show no sign of deminishing. © 2020 Wiley Periodicals, Inc.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
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9
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Jeong HM, Lee Y, Shin YJ, Woo SH, Kim JS, Jeong DW, Shin S, Jeon SH, Shim JH. Development of an enzymatic encapsulation process for a cycloamylose inclusion complex with resveratrol. Food Chem 2020; 345:128777. [PMID: 33321347 DOI: 10.1016/j.foodchem.2020.128777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 11/27/2020] [Accepted: 11/28/2020] [Indexed: 12/29/2022]
Abstract
Cyclodextrin glucanotransferase (CGTase; EC 2.4.1.19) produces cycloamyloses (CAs), which are large cyclic glucans, and subsequently transforms them to α-, β-, and γ-cyclodextrins. We developed a novel encapsulation process based on the cyclization activity of CGTase and applied it to the formation of CA inclusion complexes with resveratrol (RVT), which has limited bioavailability due to its low water solubility. The encapsulated RVT (CA-RVT) was purified using preparative high-performance liquid chromatography. The water solubility of CA-RVT was 6,000-fold higher than that of RVT. CA-RVT in water demonstrated 98% stability for 1 week at 4 °C. According to radical scavenging activity and anti-inflammatory assays, CA-RVT in aqueous solution exhibited similar activities as an equal amount of RVT in dimethyl sulfoxide, suggesting the limited solubility of RVT can be overcome through CA encapsulation by CGTase, thus enhancing its nutraceutical value as a functional ingredient in the food industry.
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Affiliation(s)
- Hyun-Mo Jeong
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
| | - Yeontaek Lee
- Department of Life Science and Multidisciplinary Genome Institute, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, South Korea
| | - Yu-Jeong Shin
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
| | - Seung-Hye Woo
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
| | - Ji-Soo Kim
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
| | - Da-Woon Jeong
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
| | - Sooyong Shin
- Department of Life Science and Multidisciplinary Genome Institute, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, South Korea.
| | - Sung Ho Jeon
- Department of Life Science and Multidisciplinary Genome Institute, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, South Korea.
| | - Jae-Hoon Shim
- Department of Food Science and Nutrition, and the Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gwangwon-do 24252, South Korea.
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10
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Nimpiboon P, Tumhom S, Nakapong S, Pongsawasdi P. Amylomaltase from Thermus filiformis: expression in Saccharomyces cerevisiae and its use in starch modification. J Appl Microbiol 2020; 129:1287-1296. [PMID: 32330366 DOI: 10.1111/jam.14675] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/30/2020] [Accepted: 04/21/2020] [Indexed: 01/30/2023]
Abstract
AIM To express amylomaltase from Thermus filiformis (TfAM) in a generally recognized as safe (GRAS) organism and to use the enzyme in starch modification. METHODS AND RESULTS TfAM was expressed in Saccharomyces cerevisiae, using 2% (w/v) galactose inducer under GAL1 promoter. The enzyme was thermostable with high disproportionation and cyclization activities. The main large-ring cyclodextrin (CD) products were CD24-CD29, with CD26 as maximum at all incubation times. TfAM was used to modify cassava and pea starches, the amylose content decreased 18% and 30%, respectively, when 5% (w/v) starch was treated with 0·5 U TfAM g-1 starch. The increase in short branched chain (DP, degree of polymerization, 1-5) and the broader chain length distribution pattern which extended to the longer chain (DP40) after TfAM treatment were observed. The thermal property was changed, with an increase in retrogradation of starch as suggested by a lower enthalpy. CONCLUSIONS TfAM was successfully expressed in S. cerevisiae and was used to make starches with new functionality. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report on the expression of AM in the GRAS yeast and the production of a modified starch gel from pea starch to improve the versatility of starch for food use.
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Affiliation(s)
- P Nimpiboon
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - S Tumhom
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - S Nakapong
- Department of Chemistry, Faculty of Science, Ramkamhaeng University, Bangkok, Thailand
| | - P Pongsawasdi
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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11
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Cao C, Xu L, Xie P, Hu J, Qi J, Zhou Y, Cao L. The characterization and evaluation of the synthesis of large-ring cyclodextrins (CD 9-CD 22) and α-tocopherol with enhanced thermal stability. RSC Adv 2020; 10:6584-6591. [PMID: 35495982 PMCID: PMC9049713 DOI: 10.1039/c9ra10748g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 01/21/2020] [Indexed: 11/21/2022] Open
Abstract
Large-ring cyclodextrins LR-CDs (CD9–CD22) were obtained from rice starch using cyclodextrin glycosyltransferase (CGTase), and were used as a wall material for embedding α-tocopherol. Complexes of α-tocopherol and LR-CDs were prepared by co-precipitation. A molar ratio of α-tocopherol/LR-CD of 1 : 2 showed the highest encapsulation efficiency. The surface morphology of the complex particles was observed to vary from irregular flakes to the formation of smaller clusters of particles using scanning electron microscopy (SEM). Based on 1H NMR and FT-IR observations, the inclusion complexes exhibited significant chemical shifts of 0.3 ppm and decreased peak signals. In addition, thermal analysis showed that the microcapsules improved the thermostability of the α-tocopherols. Antioxidant activity analysis proved the stability of α-tocopherol during storage. This study could serve as a reference for the more effective use of LR-CDs as wall materials. Large-ring cyclodextrins LR-CDs (CD9–CD22) were obtained from rice starch using cyclodextrin glycosyltransferase (CGTase), and were used as a wall material for embedding α-tocopherol.![]()
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Affiliation(s)
- Chuan Cao
- Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China .,Anhui Vocational College of Grain Engineering Hefei 230011 China
| | - Li Xu
- Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China
| | - Peng Xie
- Nanjing University of Finance and Economics China
| | - Jinwei Hu
- Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China
| | - Jun Qi
- Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China
| | - Yibin Zhou
- Anhui Engineering Laboratory for Agro-products Processing, Anhui Agricultural University Hefei 230036 China
| | - Lei Cao
- Institute of Agro-Products Processing, Anhui Academy of Agricultural Sciences China
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12
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Park J, Rho SJ, Kim YR. Feasibility and characterization of the cycloamylose production from high amylose corn starch. Cereal Chem 2018. [DOI: 10.1002/cche.10102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jiwoon Park
- Department of Biosystems & Biomaterials Science and Engineering; Seoul National University; Seoul Korea
| | - Shin-Joung Rho
- Center for Food and Bioconvergence; Seoul National University; Seoul Korea
| | - Yong-Ro Kim
- Department of Biosystems & Biomaterials Science and Engineering; Seoul National University; Seoul Korea
- Center for Food and Bioconvergence; Seoul National University; Seoul Korea
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13
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Wendisch VF, Brito LF, Gil Lopez M, Hennig G, Pfeifenschneider J, Sgobba E, Veldmann KH. The flexible feedstock concept in Industrial Biotechnology: Metabolic engineering of Escherichia coli, Corynebacterium glutamicum, Pseudomonas, Bacillus and yeast strains for access to alternative carbon sources. J Biotechnol 2016; 234:139-157. [DOI: 10.1016/j.jbiotec.2016.07.022] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/25/2016] [Accepted: 07/28/2016] [Indexed: 11/28/2022]
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14
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Joo S, Kim S, Seo H, Kim KJ. Crystal Structure of Amylomaltase from Corynebacterium glutamicum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:5662-5670. [PMID: 27366969 DOI: 10.1021/acs.jafc.6b02296] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amylomaltase is an essential enzyme in maltose utilization and maltodextrin metabolism, and it has been industrially used for the production of cyclodextrin and modification of starch. We determined the crystal structure of amylomaltase from Corynebacterium glutamicum (CgAM) at a resolution of 1.7 Å. Although CgAM forms a dimer without NaCl, it exists as a monomer in physiological concentration of NaCl. CgAM is composed of N- and C-terminal domains, which can be further divided into two and four subdomains, respectively. It exhibits a unique structural feature at the functionally unknown N-domain and also shows two striking differences at the C-domain compared to other amylomaltases. These differences at extended edge of the substrate-binding site might affect substrate specificity for large cyclodextrin formation. The bis-tris methane and sulfate molecules bound at the substrate-binding site of our current structure mimic the binding of the hydroxyl groups of glucose bound at subsites -1 and -2, respectively.
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Affiliation(s)
- Seongjoon Joo
- Structural and Molecular Biology Laboratory, School of Life Sciences and Biotechnology, Kyungpook National University , Daehak-ro 80, Buk-ku, Daegu 702-701, Republic of Korea
| | - Sangwoo Kim
- Structural and Molecular Biology Laboratory, School of Life Sciences and Biotechnology, Kyungpook National University , Daehak-ro 80, Buk-ku, Daegu 702-701, Republic of Korea
- School of Nano-Bioscience and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan, 689-798, Republic of Korea
| | - Hogyun Seo
- Structural and Molecular Biology Laboratory, School of Life Sciences and Biotechnology, Kyungpook National University , Daehak-ro 80, Buk-ku, Daegu 702-701, Republic of Korea
| | - Kyung-Jin Kim
- Structural and Molecular Biology Laboratory, School of Life Sciences and Biotechnology, Kyungpook National University , Daehak-ro 80, Buk-ku, Daegu 702-701, Republic of Korea
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