Starch granular protein of high-amylose wheat gives innate resistance to amylolysis

•High-amylose wheat starch (HAWS) has more granular protein content than wild type.•Mass spectrometry Proteomics revealed the protein profile of HAWS.•Granular-bound starch synthase (GBSS) content increases with amylose content.•Relative abundance of major granular proteins in HAWS does not differ f...

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Bibliographic Details
Published in:Food chemistry 2020-11, Vol.330, p.127328-127328, Article 127328
Main Authors: Li, Hai-Teng, Sartika, Rakhmi S., Kerr, Edward D., Schulz, Benjamin L., Gidley, Michael J., Dhital, Sushil
Format: Article
Language:English
Subjects:
Amylose
Digestibility
Granular protein
Resistant starch
Wheat
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Summary:•High-amylose wheat starch (HAWS) has more granular protein content than wild type.•Mass spectrometry Proteomics revealed the protein profile of HAWS.•Granular-bound starch synthase (GBSS) content increases with amylose content.•Relative abundance of major granular proteins in HAWS does not differ from wild type.•Greater granular protein content in HAWS contributes to slower amylolysis. Granular protein is an important structural feature in determining starch digestibility. High-amylose wheat starch (HAWS) with >80% amylose content contains more granular protein than wild-type starch. As analyzed by mass spectrometry-based proteomics, granular-bound starch synthase (GBSS) is the major granular protein in isolated starch materials. GBSS content increases with amylose content (Spearman’s correlation, p 
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2020.127328