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Proteoglycans

Proteoglycans

Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...

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A Simple Quality Evaluation Method for Proteoglycan after Addition to Beverages.

Ikuko Kakizaki¹, Yoji Kato^2,3

¹1 Department of Glycotechnology, Center for Advanced Medical Research, Hirosaki University Graduate School of Medicine.

Journal of Applied Glycoscience

|July 27, 2022

Summary

A new immunological method can now easily assess salmon cartilage proteoglycan amount and quality in products. This technique evaluates core protein, chondroitin sulfate chains, and hyaluronan binding activity for better quality control.

Keywords:

aggrecan cartilage extract chondroitin sulfate domain hyaluronan proteoglycan

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A Quantitative Glycomics and Proteomics Combined Purification Strategy

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Area of Science:

Biochemistry
Immunology
Analytical Chemistry

Background:

Salmon cartilage proteoglycan is increasingly used in consumer products.
Evaluating the quantity and quality of proteoglycan in these products presents a significant challenge.
Existing methods lack the specificity to assess key functional components.

Purpose of the Study:

To develop a novel immunological method for evaluating salmon cartilage proteoglycan.
To enable easy assessment of both the amount and quality of proteoglycan in complex mixtures.
To verify the integrity of functional domains and glycosaminoglycan chains.

Main Methods:

Development of an immunoassay utilizing specific antibodies against proteoglycan components.
Application of the assay to proteoglycan-containing compositions.
Utilizing hyaluronan as a probe to assess binding activity.

Main Results:

The proposed method accurately quantifies proteoglycan content.
It confirms the retention of functional core protein domains.
It verifies the presence and integrity of chondroitin sulfate chains and hyaluronan binding capacity.

Conclusions:

The developed immunological method provides a simple and effective means for quality control of salmon cartilage proteoglycan.
This technique is valuable for assessing proteoglycan integrity during manufacturing and product shelf-life.
It ensures the quality and functionality of proteoglycan in commercial products.