Physicochemical properties of partially alpha-glucan-coated normal corn starch formed by amylosucrase from Neisseria polysaccharea
- Authors
- Hong, Moon-Gi; Seo, Dong-Ho; Park, Cheon-Seok; Baik, Moo-Yeol; Kim, Hyun-Seok; Kum, Jun-Seok; Choi, Hee-Don; Yoo, Sang-Ho; Lee, Byung-Hoo
- Issue Date
- 15-Jul-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Retrogradation; Amylosucrase; Starch coating
- Citation
- INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, v.133, pp.1102 - 1106
- Journal Title
- INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
- Volume
- 133
- Start Page
- 1102
- End Page
- 1106
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1241
- DOI
- 10.1016/j.ijbiomac.2019.04.133
- ISSN
- 0141-8130
- Abstract
- Amylosucrase (AS) is a glycosyltransferase that produces linear alpha-1,4 glucans using sucrose as the sole substrate. In this study, for various applications, alpha-glucan-coated starch (alpha-GCS) was produced by AS (20 U/L-reactant) from Neisseria polysaccharea to improve the physicochemical properties of raw normal corn starch (NCS) by applying different reaction conditions (i.e., varying the substrate concentration, pH, and temperature). Field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) showed that raw NCS was successfully coated by alpha-glucan. Differential scanning calorimetry (DSC) and rapid viscosity analyses (RVA) of the alpha-GCS confirmed that the alpha-glucan coating decreased the degree of retrogradation. Notably, compared to raw NCS as a control, starch retrogradation was significantly (p < 0.05) decreased by 13.7% after five weeks. Therefore, the novel alpha-GCS can be applied as a functional material for controlled retrogradation in the starch-based food industry for shelf-life extension. (C) 2019 Elsevier B.V. All rights reserved.
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