Related Experiment Video
Updated: Jun 27, 2026
09:37
Preparation of Fungal and Plant Materials for Structural Elucidation Using Dynamic Nuclear Polarization Solid-State NMR
Published on: February 12, 2019
Mechanistic Insights into Starch-Polyphenol Complexation: Role of Structural Differences in Galloyl-Based Polyphenols
Liang Wang1, Leyi Li2, Seda Arioglu-Tuncil3
1Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
Antioxidants (Basel, Switzerland)
|June 26, 2026
Summary
The number and accessibility of galloyl moieties in polyphenols significantly impact their interaction with high-amylose maize starch (HAMS). Understanding these galloyl-based polyphenol-starch complexation mechanisms is key for using fruit by-products in functional foods.
Area of Science:
- Food Science and Technology
- Biochemistry
- Agricultural By-products Valorization
Background:
- Fruit and vegetable processing by-products are rich in antioxidant polyphenols.
- Polyphenol-starch interactions are crucial for developing functional food ingredients.
- The influence of galloyl moiety characteristics on these interactions is not well understood.
Purpose of the Study:
- To investigate how galloyl moiety number and accessibility affect the complexation of polyphenols with high-amylose maize starch (HAMS).
- To elucidate the interaction mechanisms between model galloyl-based polyphenols and HAMS.
Main Methods:
- Utilized corilagin and 1,2,3,4,6-O-pentagalloyl glucose as model polyphenols.
- Employed size-exclusion chromatography, FTIR, isothermal titration calorimetry, and molecular dynamics simulations.
- Analyzed changes in HAMS structure and polyphenol binding affinities.
Main Results:
- Both polyphenols preferentially complexed with amylose via non-covalent interactions.
- Corilagin disrupted HAMS short-range order, while 1,2,3,4,6-O-pentagalloyl glucose induced V-type crystallization.
- 1,2,3,4,6-O-pentagalloyl glucose exhibited stronger binding affinity and more stable complexation with the amylose helix.
Conclusions:
- Galloyl moiety characteristics significantly modulate starch-polyphenol interaction mechanisms.
- Findings provide insights for utilizing polyphenol-rich agro-processing by-products in functional starch-based foods.
Related Concept Videos
03:25Chemistry of Carbohydrates
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...
01:19Complexation Equilibria: The Chelate Effect
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
00:43Complexometric Titration: Ligands
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
01:15Cellulose and Pectic Polysaccharides
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the parenchyma cells of...
As a cell matures, its cell wall specializes according to its type. For example, the parenchyma cells of...
01:26Biosynthesis of Polysaccharides
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...