IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Molecular binding mechanisms between grape seed polypeptides and wine anthocyanins by fluorescence spectroscopy and computational techniques

Molecular binding mechanisms between grape seed polypeptides and wine anthocyanins by fluorescence spectroscopy and computational techniques


In recent years, proteins endogenous to grape have become of great interest to the wine industry because they represent a new alternative to other biopolymers subjected to more legal restrictions (i.e. animal origin and synthetics) that can be used in technological applications to modulate sensory attributes such as wine color and have a positive impact on wine quality.
Due to their great techno-functional value, some major protein components of grape seed endosperm have been identified and its potential use for color protection purposes have been already tested in wines at experimental scale. Notwithstanding, the capability of proteins to modulate sensory properties is highly dependent on their structural features, their ability to form specific 3D conformations, and the interaction with other molecules present in food matrices such as anthocyanin pigments in wines. Recently, we have confirmed by means of theoretical studies that grape seed  globulins can stablish different types of interactions (hydrogen bonding, alkyl and π-π) with the main grape anthocyanin (malvidin 3-gl).To date, however, such as interactions has been scarcely studied. Although a basic molecular interaction mechanism similar to copigmentation has been suggested, many questions still remain unclarified. In this sense, a deeper molecular understanding of the grape seed protein-anthocyanin interactions is needed to better define their potential uses and technological applications.
Thus, the main objective of this work was to explore new molecular binding mechanisms between grape seed polypeptides and wine anthocyanins in model wine solutions through fluorescence spectroscopy and computational techniques. For this purpose, fluorescence extinction spectroscopy was used to experimentally confirm the possible interaction mechanisms, the affinity constants, the stoichiometry of the complexes and other thermodynamic parameters. In addition, molecular modelling techniques, such as docking studies, were used to model the  most energetically favorable binding sites of wine anthocyanins on the grape seed polypeptide. Results will provide insights and substantial information about protection to colors expressed by anthocyanins in red wine.


Publication date: June 23, 2022

Issue: IVAS 2022

Type: Poster


Chamizo-González Francisco1, Gordillo Arrobas Belén1, Hereida Francisco J.1, Días Ricardo2 and Freitas Víctor2

1Food Colour and Quality Laboratory, Facultad de Farmacia, Universidad de Sevilla, 41012, Sevilla, Spain
2Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto  

Contact the author


wine anthocyanin, grape seed polypeptides, molecular interaction, Quenching of fluorescence, computational techniques


IVAS 2022 | IVES Conference Series


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.