ISSN 2308-4057 (Print),
ISSN 2310-9599 (Online)

Directed homoenzymatic fragmentation of the plant protopectin complex: Assessment criteria

Abstract
Introduction. The functional basis of protopectin complex can be represented as a network of regions that consist of homogalacturonan sequences and a base of rhamnogalacturonans-I, i.e. rhamnosyl-containing branching sites. Enzymatic isolation of these regions is possible only at a certain minimal native degree of polymerization. The research objective was to develop a system of criteria for assessing the potential applicability of the enzymatic transformation of plant protopectin complex.
Study objects and methods. The research featured the polymerization degree of the homogalacturonan regions of the protopectin complex and produced a system of assessment criteria for the enzymatic fragmentation potential of the protopectin complex. The theoretical calculations were based on the values of the mass fractions of rhamnosyl and galacturonide residues in plant cell walls. The result was a new polymerization degree analytical function.
Results and discussion. The ratio of the mass fractions of rhamnosyl and galacturonide residues in the water-insoluble plant tissue served as a dimensionless criterion of applicability. The rational condition for the dimensionless criterion of applicability was based on the fundamental constraint for homogalacturonan regions in the protopectin complex. It was expressed by a fundamental inequation. The rational area for determining the numerical values of the applicability criterion was presented as. The functional dependence was reduced to a two-dimensional criteria space as “width of rhamnosyl branches vs. the criterion of applicability”, where each pectin-containing raw material was given a single uniquely defined position. The boundary conditions for the criteria space were determined analytically.
Conclusion. The new approach offers an assessment of the enzymatic fragmentation potential of the plant protopectin complex by homoenzyme preparations. The approach is in fact the second stage of the decision tree in the science-based technology for pectin and its products.
Keywords
Protopectin complex, rhamnogalacturonan-I, homogalacturonan, transformation, criterion assessment
FUNDING
The research was part of state assignment of the V.M. Gorbatov Federal Research Center for Food Systems of RAS (Russian Academy of Sciences).
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How to quote?
Kondratenko VV, Kondratenko TYu, Petrov AN. Directed homoenzymatic fragmentation of the plant protopectin complex: Assessment criteria. Foods and Raw Materials. 2021;9(2):254–261. https://doi.org/10.21603/2308-4057-2021-2-254-261
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