Structural and physicochemical properties of enzymatically modified rice starch as influenced by the degree of enzyme treatment

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2020-01-01 DOI:10.1080/07328303.2020.1788574

Hye Rin Park , Jihyun Kang , Shin-Joung Rho , Yong-Ro Kim

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引用次数: 7

Abstract

The structure and physicochemical properties of rice starch modified with 4-α-glucanotransferase (4αGTase) were compared for different enzyme treatment times (1, 24, and 96 h). Specifically, the gelation properties of native rice starch and 4αGTase-treated rice starch (GS) were analyzed regarding their structural characteristics. The average molecular weight of GS decreased with increasing treatment time, and was 4.73 × 10⁴ g/mol after 96 h of treatment. The chain length distribution was also broadened with the enzyme treatment, as 4αGTase transferred α-glucan from one chain to another. The enzyme treatment also altered the gelation properties and decreased the viscosity of the starch depending on the treatment time, perhaps due to the changes in molecular weight distribution and branched chain length distribution. Moreover, the overall characteristics of GS differed significantly from those of maltodextrin. The physicochemical characteristics of GS with different degrees of 4αGTase treatment suggest that it can be used in the food and pharmaceutical industries.

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酶处理程度对酶改大米淀粉结构和理化性质的影响

比较了4-α-葡聚糖转移酶(4α gtase)对大米淀粉进行酶处理1、24、96 h后的结构和理化性质。具体而言，分析了天然大米淀粉和4α gtase处理的大米淀粉(GS)的凝胶性质及其结构特征。GS的平均分子量随着处理时间的增加而降低，处理96 h后为4.73 × 104 g/mol。4α - gtase将α-葡聚糖从一条链转移到另一条链，使链长分布变宽。酶处理还改变了淀粉的凝胶性质，并根据处理时间降低了淀粉的粘度，这可能是由于分子量分布和支链长度分布的变化。此外，GS的总体特征与麦芽糖糊精有显著差异。经过不同程度4α - gtase处理后的GS的理化特性表明其可用于食品和制药行业。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.