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Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
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Starch molecular structure and diabetes.

Jihui Zhu1, Robert G Gilbert1

  • 1Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education and Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University/Jiangsu Co-Innovation Centre for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu Province 225009, China; The University of Queensland, Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, Brisbane, QLD 4072, Australia.

Carbohydrate Polymers
|September 1, 2024
PubMed
Summary
This summary is machine-generated.

Starch chain-length distribution (CLD) impacts food digestibility and diabetes risk. Understanding CLD biosynthesis and measurement helps develop healthier starch-based foods with improved taste and lower diabetes risk.

Keywords:
Biosynthesis-based modelsChain length distributionDiabetesDigestibilityHuman health and wellbeingPalatabilityStarch

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Area of Science:

  • Biochemistry
  • Food Science
  • Plant Breeding

Background:

  • Starch is a key dietary energy source, and its chain-length distribution (CLD) significantly influences food properties like digestibility and palatability.
  • The rate of starch digestion is linked to diabetes, a widespread health concern.
  • Biosynthesis enzymes, including starch synthase, starch branching enzymes, and debranching enzymes, regulate starch CLD.

Purpose of the Study:

  • To review methods for measuring starch CLD.
  • To examine models for fitting CLDs to biosynthesis parameters.
  • To explore the relationship between CLD, diabetes, and food characteristics for developing improved starch-based foods.

Main Methods:

  • Review of starch chain-length distribution (CLD) measurement techniques, such as size-exclusion chromatography and fluorophore-assisted carbohydrate electrophoresis.
  • Analysis of fitting observed CLDs to biosynthesis-based models using enzyme isoform activity ratios.
  • Examination of the interplay between CLD, diabetes occurrence and management, and food palatability.

Main Results:

  • Starch CLD is a critical determinant of physiological properties, including digestibility and palatability.
  • Biosynthesis enzyme isoforms play a crucial role in controlling starch CLD.
  • Mathematical models can describe CLD features based on enzyme activity ratios.

Conclusions:

  • Optimizing starch CLD through plant breeding can lead to foods that are both healthier (lower diabetes risk) and more palatable.
  • Understanding starch biosynthesis pathways is key to manipulating CLD for improved food products.
  • This knowledge can guide the development of starch-based foods with enhanced nutritional and sensory qualities.