文献类型： 外文期刊
第一作者： Zhu, Jihui
作者： Zhu, Jihui;Zhang, Changquan;Liu, Qiaoquan;Yu, Wenwen;Zhang, Changquan;Li, Enpeng;Gilbert, Robert G.;Liu, Qiaoquan;Zhu, Yajun;Xu, Jianlong;Zhu, Jihui;Gilbert, Robert G.
作者机构：
关键词： Starch; Biosynthesis; Enzymes; Amylose; Amylopectin; Rice
期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）
ISSN： 0144-8617
年卷期： 2020 年 230 卷
页码：
收录情况： SCI
摘要： How various isoforms of rice-starch biosynthesis enzymes interact during amylose and amylopectin synthesis is explored. The chain-length distributions of amylopectin and amylose from 95 varieties with different environmental and genetic backgrounds were obtained using size- exclusion chromatography, and fitted with biosynthesis-derived models based on isoforms of starch synthase (SSI-SSIV), starch branching enzyme (SBE, including SBEI and SBEII) and granule-bound starch synthase (GBSS) that are involved in amylose and amylopectin synthesis. It is usually thought that these are synthesized by separate enzymes. However, the amount of longer amylopectin chains correlated with that of shorter amylose chains, indicating that GBSS, SBE and SS affect both amylose and amylopectin synthesis. Further, the activity of GBSS in amylose correlated with that of SS in amylopectin. This new understanding of which enzymes are suggested by the statistics to be involved in both amylose and amylopectin synthesis could help rice breeders develop cereals with targeted properties.
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