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Xia C, Zhong L, Wang J, Zhang L, Chen X, Ji H, Ma S, Dong W, Ye X, Huang Y, Li Z, Cui Z. Structural and digestion properties of potato starch modified using an efficient starch branching enzyme AqGBE. Int J Biol Macromol 2021; 184:551-557. [PMID: 34171255 DOI: 10.1016/j.ijbiomac.2021.06.135] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/24/2021] [Accepted: 06/20/2021] [Indexed: 11/25/2022]
Abstract
Modified potato starch with slower digestion may aid the development of new starch derivatives with improved nutritional values, and strategies to increase nutritional fractions such as resistant starch (RS) are desired. In this study, a correspondence between starch structure and enzymatic resistance was provided based on the efficient branching enzyme AqGBE, and modified starches with different amylose content (Control, 100%; PS1, 90%; PS2, 72%; PS3, 32%; PS4, 18%) were prepared. Through SEM observation, NMR and X-ray diffraction analyses, we identified that an increased proportion of α-1,6-linked branches in potato starch changes its state of granule into large pieces with crystallinity. Molecular weight and chain-length distribution analysis showed a decrease of molecular weight (from 1.1 × 106 to 1.1 × 105 g/mol) without an obvious change of chain-length distribution in PS1, while PS2-4 exhibited an increased proportion of DP 6-12 with a stable molecular weight distribution, indicating a distinct model of structural modification by AqGBE. The enhancement of peak viscosity was related to increased hydrophobic interactions and pieces state of PS1, while the contents of SDS and RS in PS1 increased by 37.7 and 49.4%, respectively. Our result provides an alternative way to increase the RS content of potato starch by branching modification.
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Affiliation(s)
- Chengyao Xia
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lingli Zhong
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Juying Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lei Zhang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaopei Chen
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hangyan Ji
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Shiyun Ma
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211800, PR China
| | - Xianfeng Ye
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yan Huang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhoukun Li
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Zhongli Cui
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Science, Nanjing Agricultural University, Nanjing 210095, PR China
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Zhao W, Yan T, Yin W. Structural characterization, storage stability, and antioxidant activity of a novel amylose–lycopene inclusion complex. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenhong Zhao
- School of Food Science and Technology Henan University of Technology Zhengzhou China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety Guangzhou China
| | - Tingting Yan
- School of Food Science and Technology Henan University of Technology Zhengzhou China
| | - Wenting Yin
- School of Food Science and Technology Henan University of Technology Zhengzhou China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety Guangzhou China
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3
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Zhang YF, Tang YL, Jiang MJ, Ji Q. Effect of glgB/GASBD fusion gene expression on increased branching degree of potato starch and changes in physicochemical properties of starch. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2020. [DOI: 10.1080/10942912.2020.1734614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Yun-Feng Zhang
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai’an, China
| | - Yu-Ling Tang
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai’an, China
| | - Meng-Jun Jiang
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai’an, China
| | - Qin Ji
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai’an, China
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Huang XF, Nazarian F, Vincken JP, Visser RGF, Trindade LM. A tandem CBM25 domain of α-amylase from Microbacterium aurum as potential tool for targeting proteins to starch granules during starch biosynthesis. BMC Biotechnol 2017; 17:86. [PMID: 29202734 PMCID: PMC5715617 DOI: 10.1186/s12896-017-0406-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 11/27/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Starch-binding domains from carbohydrate binding module family 20 have been used as a tool for starch engineering. Previous studies showed that expression of starch binding domain fusion proteins in planta resulted in modified starch granule structures and physicochemical properties. However, although 13 carbohydrate binding module families have been reported to contain starch-binding domains, only starch-binding domains from carbohydrate binding module family 20 have been well studied and introduced into plants successfully. In this study, two fragments, the tandem CBM25 domain and the tandem CBM25 with multiple fibronectin type III (FN3) domains of the α-amylase enzyme from Microbacterium aurum, were expressed in the tubers of a wild type potato cultivar (cv. Kardal) and an amylose-free (amf) potato mutant. RESULTS The (CBM25)2 and FN3 protein were successfully accumulated in the starch granules of both Kardal and amf transformants. The accumulation of (CBM25)2 protein did not result in starch morphological alterations in Kardal but gave rise to rough starch granules in amf, while the FN3 resulted in morphological changes of starch granules (helical starch granules in Kardal and rough surface granules in amf) but only at a very low frequency. The starches of the different transformants did not show significant differences in starch size distribution, apparent amylose content, and physico-chemical properties in comparison to that of untransformed controls. CONCLUSION These results suggest that the starch-binding domains from carbohydrate binding module family 25 can be used as a novel tool for targeting proteins to starch granules during starch biosynthesis without side-effects on starch morphology, composition and properties.
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Affiliation(s)
- Xing-Feng Huang
- Wageningen University and Research, Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
- Present address: Department of Chemical and Biological Engineering, Colorado State University, Campus delivery 1370, Fort Collins, CO 80523 USA
| | - Farhad Nazarian
- Wageningen University and Research, Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
- Present address: Agronomy and plant breeding group, Faculty of Agriculture, University of Lorestan, P.O.Box 465, Khorramabad, Iran
| | - Jean-Paul Vincken
- Wageningen University and Research, Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
- Present address: Laboratory of Food Chemistry, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Richard G. F. Visser
- Wageningen University and Research, Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
| | - Luisa M. Trindade
- Wageningen University and Research, Plant Breeding, P.O. Box 386, 6700 AJ Wageningen, The Netherlands
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Xu X, Dees D, Huang XF, Visser RG, Trindade LM. Heterologous expression of two Arabidopsis
starch dikinases in potato. STARCH-STARKE 2017. [DOI: 10.1002/star.201600324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Xuan Xu
- Wageningen UR Plant Breeding; Wageningen University and Research; Wageningen The Netherlands
- Key Laboratory of Horticultural Plant Biology, National Centre for Vegetable Improvement (Central China), Ministry of Education; Huazhong Agricultural University; Wuhan P.R. China
| | - Dianka Dees
- Wageningen UR Plant Breeding; Wageningen University and Research; Wageningen The Netherlands
| | - Xing-Feng Huang
- Wageningen UR Plant Breeding; Wageningen University and Research; Wageningen The Netherlands
| | - Richard G.F. Visser
- Wageningen UR Plant Breeding; Wageningen University and Research; Wageningen The Netherlands
| | - Luisa M. Trindade
- Wageningen UR Plant Breeding; Wageningen University and Research; Wageningen The Netherlands
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Engineering Potato Starch with a Higher Phosphate Content. PLoS One 2017; 12:e0169610. [PMID: 28056069 PMCID: PMC5215930 DOI: 10.1371/journal.pone.0169610] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 12/17/2016] [Indexed: 11/19/2022] Open
Abstract
Phosphate esters are responsible for valuable and unique functionalities of starch for industrial applications. Also in the cell phosphate esters play a role in starch metabolism, which so far has not been well characterized in storage starch. Laforin, a human enzyme composed of a carbohydrate-binding module and a dual-specificity phosphatase domain, is involved in the dephosphorylation of glycogen. To modify phosphate content and better understand starch (de)phosphorylation in storage starch, laforin was engineered and introduced into potato (cultivar Kardal). Interestingly, expression of an (engineered) laforin in potato resulted in significantly higher phosphate content of starch, and this result was confirmed in amylose-free potato genetic background (amf). Modified starches exhibited altered granule morphology and size compared to the control. About 20–30% of the transgenic lines of each series showed red-staining granules upon incubation with iodine, and contained higher phosphate content than the blue-stained starch granules. Moreover, low amylose content and altered gelatinization properties were observed in these red-stained starches. Principle component and correlation analysis disclosed a complex correlation between starch composition and starch physico-chemical properties. Ultimately, the expression level of endogenous genes involved in starch metabolism was analysed, revealing a compensatory response to the decrease of phosphate content in potato starch. This study provides a new perspective for engineering starch phosphate content in planta by making use of the compensatory mechanism in the plant itself.
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Xu X, Dechesne A, Visser RGF, Trindade LM. Expression of an (Engineered) 4,6-α-Glucanotransferase in Potato Results in Changes in Starch Characteristics. PLoS One 2016; 11:e0166981. [PMID: 27911907 PMCID: PMC5135068 DOI: 10.1371/journal.pone.0166981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/07/2016] [Indexed: 11/19/2022] Open
Abstract
Starch structure strongly influences starch physicochemical properties, determining the end uses of starch in various applications. To produce starches with novel structure and exploit the mechanism of starch granule formation, an (engineered) 4, 6-α-glucanotransferase (GTFB) from Lactobacillus reuteri 121 was introduced into two potato genetic backgrounds: amylose-containing line Kardal and amylose-free mutant amf. The resulting starches showed severe changes in granule morphology regardless of genetic backgrounds. Modified starches from amf background exhibited a significant increase in granule size and starch phosphate content relative to the control, while starches from Kardal background displayed a higher digestibility, but did not show changes in granule size and phosphate content. Transcriptome analysis revealed the existence of a mechanism to restore the regular packing of double helices in starch granules, which possibly resulted in the removal of novel glucose chains potentially introduced by the (engineered) GTFB. This amendment mechanics would also explain the difficulties to detect alterations in starch fine structure in the transgenic lines.
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Affiliation(s)
- Xuan Xu
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700, AJ, Wageningen. The Netherlands
- National Centre for Vegetable Improvement (Central China), Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Annemarie Dechesne
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700, AJ, Wageningen. The Netherlands
| | - Richard G. F. Visser
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700, AJ, Wageningen. The Netherlands
| | - Luisa M. Trindade
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700, AJ, Wageningen. The Netherlands
- * E-mail:
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Xu X, Dees D, Dechesne A, Huang XF, Visser RGF, Trindade LM. Starch phosphorylation plays an important role in starch biosynthesis. Carbohydr Polym 2016; 157:1628-1637. [PMID: 27987877 DOI: 10.1016/j.carbpol.2016.11.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/11/2016] [Accepted: 11/13/2016] [Indexed: 10/20/2022]
Abstract
Starch phosphate esters are crucial in starch metabolism and render valuable functionality to starches for various industrial applications. A potato glucan, water dikinase (GWD1) was introduced in tubers of two different potato genetic backgrounds: an amylose-containing line Kardal and the amylose-free mutant amf. In both backgrounds, this resulted in two contrasting effects, a number of plants showed higher phosphate content compared to the respective control, while others lines exhibited lower phosphate content, thereby generating two series of starches with broad-scale variation in phosphate content. The results of systematic analyses on these two series of starches revealed that starch phosphate content strongly influenced starch granule morphology, amylose content, starch fine structure, gelatinization characteristics and freeze-thaw stability of starch gels. Further analyses on the expression level of genes involved in starch metabolism suggested that starch phosphorylation regulates starch synthesis by controlling the carbon flux into starch while simultaneously modulating starch-synthesizing genes.
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Affiliation(s)
- Xuan Xu
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands; National Centre for Vegetable Improvement (Central China), Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
| | - Dianka Dees
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
| | - Annemarie Dechesne
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
| | - Xing-Feng Huang
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
| | - Richard G F Visser
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
| | - Luisa M Trindade
- Wageningen UR Plant Breeding, Wageningen University and Research, P.O. Box 386, 6700 AJ Wageningen, The Netherlands.
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Ban X, Li C, Gu Z, Bao C, Qiu Y, Hong Y, Cheng L, Li Z. Expression and Biochemical Characterization of a Thermostable Branching Enzyme from Geobacillus thermoglucosidans. J Mol Microbiol Biotechnol 2016; 26:303-11. [DOI: 10.1159/000446582] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 05/02/2016] [Indexed: 11/19/2022] Open
Abstract
The branching enzyme (EC 2.4.1.18) catalyzes the formation of α-1,6 branch points in starch. In this study, the <i>Geobacillus thermoglucosidans</i> gene-encoding branching enzyme was expressed in <i>Escherichia coli </i>BL21 (DE3) and the protein was isolated and characterized. <i>G. thermoglucosidans </i>branching enzyme is a thermostable enzyme with an optimal reaction temperature of nearly 60°C and a half-life at 65°C of approximately 1.1 h. The activity of the recombinant enzyme is optimal at pH 7.5, with broad stability between pH 5.5 and 9.0. Its thermostability, relatively broad pH stability and optimal temperature near the temperature at which starch begins to gelatinize may make it easy to use in industrial production. Furthermore, the enzyme is activated by Mg<sup>2+</sup>, Ba<sup>2+</sup>, K<sup>+</sup> and Na<sup>+</sup> in a concentration-dependent manner and dramatically inhibited by Ni<sup>2+</sup> and Co<sup>2+</sup>. Its substrate dependence, using amylopectin as the substrate, could be adequately fitted using the Michaelis-Menten equation, yielding a<i> K</i><sub>m</sub> of 0.99 mg/ml. High-performance anion exchange chromatography results showed that the chain length distribution of branching enzyme-treated waxy corn starch is indistinguishable from that of the branching enzyme-treated common corn starch. This enzyme may therefore be a promising tool for the enzymatic modification of starch.
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Boyer L, Roussel X, Courseaux A, Ndjindji OM, Lancelon-Pin C, Putaux JL, Tetlow IJ, Emes MJ, Pontoire B, D' Hulst C, Wattebled F. Expression of Escherichia coli glycogen branching enzyme in an Arabidopsis mutant devoid of endogenous starch branching enzymes induces the synthesis of starch-like polyglucans. PLANT, CELL & ENVIRONMENT 2016; 39:1432-1447. [PMID: 26715025 DOI: 10.1111/pce.12702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 12/08/2015] [Accepted: 12/16/2015] [Indexed: 06/05/2023]
Abstract
Starch synthesis requires several enzymatic activities including branching enzymes (BEs) responsible for the formation of α(1 → 6) linkages. Distribution and number of these linkages are further controlled by debranching enzymes that cleave some of them, rendering the polyglucan water-insoluble and semi-crystalline. Although the activity of BEs and debranching enzymes is mandatory to sustain normal starch synthesis, the relative importance of each in the establishment of the plant storage polyglucan (i.e. water insolubility, crystallinity and presence of amylose) is still debated. Here, we have substituted the activity of BEs in Arabidopsis with that of the Escherichia coli glycogen BE (GlgB). The latter is the BE counterpart in the metabolism of glycogen, a highly branched water-soluble and amorphous storage polyglucan. GlgB was expressed in the be2 be3 double mutant of Arabidopsis, which is devoid of BE activity and consequently free of starch. The synthesis of a water-insoluble, partly crystalline, amylose-containing starch-like polyglucan was restored in GlgB-expressing plants, suggesting that BEs' origin only has a limited impact on establishing essential characteristics of starch. Moreover, the balance between branching and debranching is crucial for the synthesis of starch, as an excess of branching activity results in the formation of highly branched, water-soluble, poorly crystalline polyglucan.
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Affiliation(s)
- Laura Boyer
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Xavier Roussel
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Adeline Courseaux
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Ofilia M Ndjindji
- Université Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV), F-38000, Grenoble, France
- CNRS, CERMAV, F-38000, Grenoble, France
| | - Christine Lancelon-Pin
- Université Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV), F-38000, Grenoble, France
- CNRS, CERMAV, F-38000, Grenoble, France
| | - Jean-Luc Putaux
- Université Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV), F-38000, Grenoble, France
- CNRS, CERMAV, F-38000, Grenoble, France
| | - Ian J Tetlow
- Department of Molecular and Cellular Biology, Science Complex, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Michael J Emes
- Department of Molecular and Cellular Biology, Science Complex, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | | | - Christophe D' Hulst
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
| | - Fabrice Wattebled
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle, F-59000, Lille, France
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Hebelstrup KH, Sagnelli D, Blennow A. The future of starch bioengineering: GM microorganisms or GM plants? FRONTIERS IN PLANT SCIENCE 2015; 6:247. [PMID: 25954284 PMCID: PMC4407504 DOI: 10.3389/fpls.2015.00247] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 03/27/2015] [Indexed: 05/10/2023]
Abstract
Plant starches regularly require extensive modification to permit subsequent applications. Such processing is usually done by the use of chemical and/or physical treatments. The use of recombinant enzymes produced by large-scale fermentation of GM microorganisms is increasingly used in starch processing and modification, sometimes as an alternative to chemical or physical treatments. However, as a means to impart the modifications as early as possible in the starch production chain, similar recombinant enzymes may also be expressed in planta in the developing starch storage organ such as in roots, tubers and cereal grains to provide a GM crop as an alternative to the use of enzymes from GM microorganisms. We here discuss these techniques in relation to important structural features and modifications of starches such as: starch phosphorylation, starch hydrolysis, chain transfer/branching and novel concepts of hybrid starch-based polysaccharides. In planta starch bioengineering is generally challenged by yield penalties and inefficient production of the desired product. However, in some situations, GM crops for starch bioengineering without deleterious effects have been achieved.
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Affiliation(s)
- Kim H. Hebelstrup
- Department of Molecular Biology and Genetics, Aarhus University, Slagelse, Denmark
- *Correspondence: Kim H. Hebelstrup, Department of Molecular Biology and Genetics, Aarhus University, Forsøgsvej 1, DK-4200 Slagelse, Denmark
| | - Domenico Sagnelli
- Department of Molecular Biology and Genetics, Aarhus University, Slagelse, Denmark
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Andreas Blennow
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
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Huang XF, Nazarian-Firouzabadi F, Vincken JP, Ji Q, Visser RGF, Trindade LM. Expression of an amylosucrase gene in potato results in larger starch granules with novel properties. PLANTA 2014; 240:409-421. [PMID: 24893853 DOI: 10.1007/s00425-014-2095-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 05/08/2014] [Indexed: 06/03/2023]
Abstract
Expression of amylosucrase in potato resulted in larger starch granules with rough surfaces and novel physico-chemical properties, including improved freeze-thaw stability, higher end viscosity, and better enzymatic digestibility. Starch is a very important carbohydrate in many food and non-food applications. In planta modification of starch by genetic engineering has significant economic and environmental benefits as it makes the chemical or physical post-harvest modification obsolete. An amylosucrase from Neisseria polysaccharea fused to a starch-binding domain (SBD) was introduced in two potato genetic backgrounds to synthesize starch granules with altered composition, and thereby to broaden starch applications. Expression of SBD-amylosucrase fusion protein in the amylose-containing potato resulted in starch granules with a rough surface, a twofold increase in median granule size, and altered physico-chemical properties including improved freeze-thaw stability, higher end viscosity, and better enzymatic digestibility. These effects are possibly a result of the physical interaction between amylosucrase and starch granules. The modified larger starches not only have great benefit to the potato starch industry by reducing losses during starch isolation, but also have an advantage in many food applications such as frozen food due to its extremely high freeze-thaw stability.
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Affiliation(s)
- Xing-Feng Huang
- Wageningen UR - Plant Breeding, Wageningen University and Research Center, P.O. Box 386, 6700 AJ, Wageningen, The Netherlands
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