GO:0050655 dermatan sulfate proteoglycan metabolic process: Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0050655 describes the chemical reactions and pathways involving dermatan sulfate proteoglycans, which are core proteins carrying dermatan sulfate glycosaminoglycan chains made of repeating beta-(1,4)-D-hexuronic acid-beta-(1,3)-N-acetyl-D-galactosamine disaccharide units.
• Dermatan sulfate proteoglycan metabolism includes synthesis of the core protein, attachment and modification of the glycosaminoglycan chain, secretion into the extracellular matrix, and endocytic degradation in lysosomes.
• The process is dynamically regulated by the extracellular environment: transfer of fibroblasts to a three-dimensional matrix induces dermatan sulfate proteoglycan and glycosaminoglycan synthesis.
• Decorin, a canonical dermatan sulfate proteoglycan, regulates signaling pathways such as ITGB1/Akt/mTOR and its deficiency promotes skeletal muscle atrophy and fibrosis in vivo.
• Endocan is a circulating dermatan sulfate proteoglycan used as a biomarker of endothelial activation and disease severity.
• Dermatan sulfate proteoglycans are abundant in the central nervous system and in mineralized tissues such as dentin, where they contribute to matrix organization and cell-matrix communication.
Description
Dermatan sulfate proteoglycan metabolic process (GO:0050655) is the biological process that encompasses the chemical reactions and pathways involving dermatan sulfate proteoglycans, a class of extracellular matrix molecules composed of a core protein covalently linked to dermatan sulfate glycosaminoglycan chains. The dermatan sulfate chain consists of repeating disaccharide units of beta-(1,4)-D-hexuronic acid and beta-(1,3)-N-acetyl-D-galactosamine, in which the hexuronic acid can be D-glucuronic acid or its epimer L-iduronic acid, and the galactosamine can be O-sulfated. This structural heterogeneity underlies the ability of dermatan sulfate proteoglycans to interact with growth factors, cytokines, and matrix receptors, thereby influencing cell adhesion, migration, proliferation, and differentiation. For researchers, GO:0050655 is important because it connects core protein biology to glycosaminoglycan biochemistry and to extracellular matrix remodeling. Studies in human fibroblasts have shown that endocytosed dermatan sulfate proteoglycan is delivered to lysosomes and degraded, defining a catabolic arm of the metabolic process. In osteoblastic cells, 1,25-dihydroxyvitamin D3 inhibits synthesis and enhances degradation of proteoglycans, demonstrating hormonal control of this pathway. Murine parietal yolk sac cells synthesize a well-characterized dermatan sulfate proteoglycan, providing an experimental model for biosynthesis. In fibroblasts, transfer to a three-dimensional extracellular environment induces dermatan sulfate proteoglycan and glycosaminoglycan synthesis, showing that the process is mechanosensitive. Because dermatan sulfate proteoglycans such as decorin and endocan participate in signaling and are altered in fibrosis, muscle atrophy, and vascular disease, GO:0050655 is a relevant entry point for functional genomics, CRISPR screening, and therapeutic target discovery. Understanding which genes control chain initiation, sulfation, secretion, and degradation is essential for interpreting matrix-related phenotypes and for designing cell models that faithfully reproduce human tissue biology.
dermatan sulfate proteoglycan metabolic process At A Glance
| GO ID | GO:0050655 |
|---|---|
| GO term | dermatan sulfate proteoglycan metabolic process |
| Ontology | biological_process |
| Synonym | chondroitin sulfate B proteoglycan metabolic process; chondroitin sulfate B proteoglycan metabolism; dermatan sulfate proteoglycan metabolism; dermatan sulphate proteoglycan metabolic process; dermatan sulphate proteoglycan metabolism |
| Major function | Biosynthesis, modification, secretion, matrix assembly, and degradation of dermatan sulfate proteoglycans such as decorin and endocan |
| Key structural unit | Repeating disaccharide beta-(1,4)-D-hexuronic acid-beta-(1,3)-N-acetyl-D-galactosamine with variable sulfation and epimerization |
| Representative core proteins | Decorin and endocan are well-studied dermatan sulfate proteoglycans with signaling and biomarker roles |
| Cellular locations | Secretory pathway, extracellular matrix, endosomes, and lysosomes where degradation occurs |
| Regulatory inputs | Extracellular matrix dimensionality, hormonal signals such as 1,25-dihydroxyvitamin D3, and integrin-linked signaling |
What Is GO:0050655?
GO:0050655, dermatan sulfate proteoglycan metabolic process, is defined as the chemical reactions and pathways involving dermatan sulfate proteoglycans, which consist of a core protein linked to a dermatan sulfate glycosaminoglycan. The dermatan sulfate chain is composed of the repeating disaccharide unit beta-(1,4)-D-hexuronic acid-beta-(1,3)-N-acetyl-D-galactosamine; the former can be a mixture of sulfated and nonsulfated D-glucuronic and L-iduronic acids, and the latter can be O-sulfated. In practical terms, the term covers biosynthesis of the core protein and its glycosaminoglycan chain, post-translational modification and secretion, assembly into the extracellular matrix, and endocytic uptake and lysosomal degradation.
Why Is dermatan sulfate proteoglycan metabolic process Important in Cell Biology?
GO:0050655 matters because dermatan sulfate proteoglycans are not passive structural molecules; they modulate growth factor availability, integrin signaling, and tissue mechanics, and their metabolic balance determines whether matrix remodeling is reparative or pathological. Perturbations in synthesis or degradation contribute to fibrosis, skeletal muscle atrophy, and vascular dysfunction, while circulating dermatan sulfate proteoglycans such as endocan serve as accessible biomarkers. Because the pathway spans protein synthesis, glycosaminoglycan enzymology, secretion, and lysosomal catabolism, it is an attractive system for dissecting gene function with CRISPR-based models.
• Dermatan sulfate proteoglycans are core components of the extracellular matrix and regulate cell adhesion, migration, and proliferation.
• Decorin deficiency promotes D-galactose-induced skeletal muscle atrophy and fibrosis through the ITGB1/Akt/mTOR signaling pathway, linking GO:0050655 to muscle homeostasis.
• Endocan, a circulating dermatan sulfate proteoglycan, is a biomarker of endothelial activation and disease severity in inflammatory and vascular conditions.
• Dermatan sulfate proteoglycans are abundant in the central nervous system, where they influence neural development and repair.
• They are present in mineralized tissues such as porcine tooth-germ dentin, indicating roles in biomineralization and matrix organization.
• Synthesis of dermatan sulfate proteoglycans is induced when fibroblasts are transferred to a three-dimensional extracellular environment, demonstrating mechanosensitive regulation.
• Endocytosed dermatan sulfate proteoglycan is degraded in human fibroblast lysosomes, defining a catabolic route relevant to matrix turnover.
• Hormonal signals such as 1,25-dihydroxyvitamin D3 inhibit synthesis and enhance degradation of proteoglycans in osteoblastic cells.
• Murine parietal yolk sac cells provide a tractable model for studying dermatan sulfate proteoglycan biosynthesis.
• Dysregulated dermatan sulfate proteoglycan metabolism is implicated in fibrosis, cancer stroma remodeling, and degenerative tissue changes.
What Happens During dermatan sulfate proteoglycan metabolic process?
Core protein synthesis and translocation into the secretory pathway
In simple terms: The cell first builds the protein backbone of the proteoglycan and moves it into the secretory route.
Dermatan sulfate proteoglycan metabolism begins with transcription and translation of the core protein, which is co-translationally translocated into the endoplasmic reticulum. Murine parietal yolk sac (PYS-2) cells synthesize a well-characterized dermatan sulfate proteoglycan, and biochemical characterization of this molecule established the core protein plus glycosaminoglycan architecture. The core protein sequence determines where glycosaminoglycan chains will be attached and how the finished proteoglycan will interact with matrix partners.
Glycosaminoglycan chain initiation and polymerization
In simple terms: Sugar building blocks are added one by one onto the core protein to form the long dermatan sulfate chain.
In the Golgi apparatus, glycosyltransferases assemble the tetrasaccharide linker and then polymerize the repeating disaccharide unit beta-(1,4)-D-hexuronic acid-beta-(1,3)-N-acetyl-D-galactosamine. The hexuronic acid can remain as D-glucuronic acid or be epimerized to L-iduronic acid, and the N-acetyl-D-galactosamine can be O-sulfated, generating the structural heterogeneity that defines dermatan sulfate. Fibroblasts transferred to a three-dimensional extracellular environment increase dermatan sulfate proteoglycan and glycosaminoglycan synthesis, showing that chain assembly is responsive to matrix context.
Sulfation, epimerization, and secretion into the extracellular matrix
In simple terms: The sugar chain is chemically decorated and then shipped out of the cell to the matrix.
Sulfotransferases and epimerases modify the growing chain, producing the sulfated and nonsulfated D-glucuronic and L-iduronic acid mixtures characteristic of dermatan sulfate. The mature proteoglycan is then secreted and incorporated into the extracellular matrix, where it contributes to matrix organization and signaling. In porcine tooth-germ dentin, immunocytochemistry has localized keratan sulfate proteoglycan and dermatan sulfate proteoglycan, indicating deposition into mineralized matrix compartments. In the central nervous system, chondroitin/dermatan sulfate proteoglycans are major matrix constituents that influence neural cell behavior.
Endocytosis and lysosomal degradation
In simple terms: Old or excess proteoglycan is taken back into the cell and broken down in the lysosome.
The catabolic arm of GO:0050655 involves endocytic uptake of dermatan sulfate proteoglycan and its delivery to lysosomes. In human fibroblasts, endocytosed dermatan sulfate proteoglycan is degraded in lysosomes, providing direct evidence for a degradative pathway. In osteoblastic cells, 1,25-dihydroxyvitamin D3 inhibits synthesis and enhances degradation of proteoglycans, showing that synthesis and catabolism are reciprocally regulated by hormonal signals. This balance between production and degradation determines net matrix accumulation.
Signaling integration and functional consequences
In simple terms: The proteoglycan does not just fill space; it talks to receptors and changes cell behavior.
Dermatan sulfate proteoglycans such as decorin modulate receptor tyrosine kinase and integrin signaling. Decorin deficiency promotes D-galactose-induced skeletal muscle atrophy and fibrosis by regulating the ITGB1/Akt/mTOR signaling pathway, directly linking a dermatan sulfate proteoglycan to intracellular growth control. Endocan, another circulating dermatan sulfate proteoglycan, is used as a marker of endothelial activation and disease severity, reflecting its role in vascular biology. These examples show that the metabolic process feeds into signaling networks that control tissue homeostasis.
Key Genes Involved in GO:0050655 dermatan sulfate proteoglycan metabolic process
The following genes and proteins represent core enzymatic, structural, and signaling components associated with dermatan sulfate proteoglycan metabolic process (GO:0050655), based on the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| DCN | Decorin core protein; dermatan sulfate proteoglycan that regulates ITGB1/Akt/mTOR signaling | Decorin deficiency promotes skeletal muscle atrophy and fibrosis; key target for matrix and muscle studies |
| ESM1 | Endocan core protein; circulating dermatan sulfate proteoglycan | Biomarker of endothelial activation and disease severity |
| ITGB1 | Integrin beta-1 receptor that mediates decorin-dependent signaling | Links dermatan sulfate proteoglycan metabolism to Akt/mTOR pathway control |
| AKT1 | Serine/threonine kinase downstream of integrin signaling | Effector of decorin-regulated muscle homeostasis |
| MTOR | Kinase controlling protein synthesis and cell growth | Integrates dermatan sulfate proteoglycan signals into anabolic programs |
| CHST | Carbohydrate sulfotransferases that sulfate glycosaminoglycan chains | Determine dermatan sulfate sulfation pattern and binding properties |
| DSE | Dermatan sulfate epimerase that converts D-glucuronic acid to L-iduronic acid | Controls iduronic acid content and chain flexibility |
| DSEL | Dermatan sulfate epimerase-like enzyme | Modulates dermatan sulfate fine structure |
| UST | Uronosyl 2-O-sulfotransferase acting on glycosaminoglycan chains | Contributes to sulfation heterogeneity of dermatan sulfate |
| CHPF | Chondroitin polymerizing factor involved in glycosaminoglycan elongation | Supports polymerization of the repeating disaccharide |
| CHSY1 | Chondroitin sulfate synthase 1 | Catalyzes chain elongation during proteoglycan biosynthesis |
| XYLT1 | Xylosyltransferase 1 that initiates glycosaminoglycan linker assembly | Required for attachment of dermatan sulfate chains to core proteins |
| XYLT2 | Xylosyltransferase 2 paralog | Redundant or complementary linker initiation enzyme |
| B4GALT7 | Galactosyltransferase in the glycosaminoglycan linker pathway | Needed for proper proteoglycan assembly |
| B3GALT6 | Galactosyltransferase in the linker region | Supports glycosaminoglycan chain initiation |
| B3GAT3 | Glucuronyltransferase in the linker tetrasaccharide | Completes the linker before polymerization |
| SULF1 | Extracellular sulfatase that modifies sulfation patterns | Can alter dermatan sulfate ligand-binding properties |
| SULF2 | Extracellular sulfatase paralog | Modulates matrix signaling and proteoglycan turnover |
How Is dermatan sulfate proteoglycan metabolic process Regulated?
Dermatan sulfate proteoglycan metabolic process is regulated at multiple levels. Extracellular matrix dimensionality acts as a strong inducer: transfer of fibroblasts to a three-dimensional environment increases dermatan sulfate proteoglycan and glycosaminoglycan synthesis. Hormonal control is exemplified by 1,25-dihydroxyvitamin D3, which inhibits synthesis and enhances degradation of proteoglycans in osteoblastic cells. Catabolism is regulated by endocytic uptake and lysosomal delivery, as shown for endocytosed dermatan sulfate proteoglycan in human fibroblasts. In addition, downstream signaling through ITGB1/Akt/mTOR integrates decorin-dependent cues into cell growth and atrophy programs, indicating that the metabolic process is coupled to intracellular kinase cascades.
dermatan sulfate proteoglycan metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DCN | Skeletal muscle atrophy and fibrosis via ITGB1/Akt/mTOR | Dcn knockout mouse or CRISPR knockout myoblast line with D-galactose challenge |
| ESM1 | Endothelial activation and vascular inflammation | Endocan overexpression or knockout endothelial cells for biomarker studies |
| CHST | Altered glycosaminoglycan sulfation and matrix binding | Point-mutation knock-in of sulfotransferase catalytic residues |
| DSE | Abnormal iduronic acid content and chain flexibility | DSE knockout fibroblasts with glycosaminoglycan profiling |
| ITGB1 | Integrin-linked signaling in muscle homeostasis | Conditional Itgb1 knockout in muscle cells |
Skeletal muscle atrophy and fibrosis
Decorin, a dermatan sulfate proteoglycan, is protective in skeletal muscle. Decorin deficiency promotes D-galactose-induced skeletal muscle atrophy and fibrosis by regulating the ITGB1/Akt/mTOR signaling pathway, indicating that loss of this proteoglycan shifts muscle toward catabolism and fibrotic remodeling. This connects GO:0050655 directly to age-related and metabolic muscle degeneration.
Vascular and inflammatory disease
Endocan is a circulating dermatan sulfate proteoglycan that serves as a biomarker of endothelial activation and disease severity. Its levels reflect vascular inflammation and endothelial dysfunction, making dermatan sulfate proteoglycan metabolism relevant to sepsis, atherosclerosis, and other vascular pathologies.
Fibrotic and matrix remodeling disorders
Because dermatan sulfate proteoglycans influence matrix assembly and growth factor availability, altered synthesis or degradation contributes to fibrosis and aberrant matrix turnover. The mechanosensitive induction of dermatan sulfate proteoglycan synthesis in three-dimensional fibroblast cultures provides a model for how tissue stiffness and matrix context drive fibrotic programs.
Neurodegeneration and central nervous system injury
Chondroitin/dermatan sulfate proteoglycans are major constituents of the central nervous system matrix and influence neural development, plasticity, and repair. Dysregulated dermatan sulfate proteoglycan metabolism may therefore contribute to barriers to regeneration after injury and to neurodegenerative processes.
From dermatan sulfate proteoglycan metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of decorin cause muscle atrophy and fibrosis? | DCN knockout mouse or CRISPR knockout C2C12 myoblasts |
| How does dermatan sulfate chain sulfation affect signaling? | Point-mutation knock-in of CHST or DSE catalytic residues in fibroblasts |
| Can endocan serve as a vascular biomarker? | ESM1 overexpression and knockout endothelial cell lines |
| Is dermatan sulfate proteoglycan synthesis mechanosensitive? | Fibroblast culture in three-dimensional matrices versus two-dimensional controls |
| How is endocytosed dermatan sulfate proteoglycan degraded? | Tagged knock-in of core protein with lysosomal trafficking reporters in human fibroblasts |
| Does 1,25-dihydroxyvitamin D3 alter proteoglycan turnover? | Osteoblastic cell lines treated with vitamin D3 and proteoglycan turnover assays |
How to Study the dermatan sulfate proteoglycan metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Metabolic sulfate labeling | Rate of glycosaminoglycan synthesis and turnover | Quantifying dermatan sulfate proteoglycan production in fibroblasts |
| Immunocytochemistry | Spatial localization of dermatan sulfate proteoglycan | Tissue distribution in dentin and matrix compartments |
| Glycosaminoglycan disaccharide analysis | Chain composition, sulfation, and iduronic acid content | Validating epimerase and sulfotransferase knockouts |
| RNA-seq | Transcriptional changes in proteoglycan-related genes | Comparing two-dimensional versus three-dimensional fibroblast culture |
| CRISPR knockout screening | Genes required for proteoglycan synthesis or degradation | Identifying novel regulators of GO:0050655 |
| Western blotting | Core protein abundance and signaling activation | Measuring decorin and ITGB1/Akt/mTOR status |
| Endocytosis and lysosomal trafficking assays | Uptake and degradation of dermatan sulfate proteoglycan | Studying catabolic arm in human fibroblasts |
| Three-dimensional matrix culture | Mechanosensitive induction of proteoglycan synthesis | Modeling fibrotic and matrix-rich environments |
Biochemical characterization of proteoglycans
Classical biochemical approaches isolate dermatan sulfate proteoglycans from cell culture or tissue and analyze core protein size, glycosaminoglycan chain length, and disaccharide composition. Murine parietal yolk sac cells were used to characterize a dermatan sulfate proteoglycan synthesized in vitro, establishing baseline methods for biosynthesis studies. These techniques remain essential for validating CRISPR phenotypes.
Metabolic labeling and turnover assays
Radiolabeled sulfate or sugar precursors can be incorporated into newly synthesized glycosaminoglycan chains, allowing measurement of synthesis rates and degradation kinetics. Endocytosed dermatan sulfate proteoglycan degradation in human fibroblasts was demonstrated with such turnover approaches. In osteoblastic cells, 1,25-dihydroxyvitamin D3 was shown to inhibit synthesis and enhance degradation using comparable labeling strategies.
Immunocytochemistry and imaging
Antibody-based detection localizes dermatan sulfate proteoglycans in tissues and cells. Immunocytochemistry of keratan sulfate proteoglycan and dermatan sulfate proteoglycan in porcine tooth-germ dentin revealed spatial distribution in mineralized matrix. Imaging can be combined with CRISPR-generated fluorescent knock-ins to track secretion and matrix deposition in live cells.
Transcriptomics and CRISPR screening
RNA-seq and CRISPR library screening can identify genes required for dermatan sulfate proteoglycan synthesis, secretion, and degradation. Because three-dimensional culture induces dermatan sulfate proteoglycan and glycosaminoglycan synthesis, transcriptomic comparisons between two-dimensional and three-dimensional fibroblasts can reveal mechanosensitive regulators. Integrating screening data with pathway annotation for GO:0050655 helps prioritize candidate genes for functional validation.
How CRISPR Can Be Used to Study GO:0050655 dermatan sulfate proteoglycan metabolic process
Knockout
CRISPR knockout of core protein genes such as DCN or ESM1 can test whether loss of a specific dermatan sulfate proteoglycan reproduces phenotypes seen in disease models. Dcn knockout approaches have been used to demonstrate that decorin deficiency promotes skeletal muscle atrophy and fibrosis through ITGB1/Akt/mTOR signaling. Knockout of glycosaminoglycan biosynthetic enzymes such as DSE or CHST can reveal how chain composition affects matrix function.
Point Mutation
Point-mutation knock-in allows precise dissection of catalytic residues in sulfotransferases and epimerases that modify dermatan sulfate chains. Because the hexuronic acid can be D-glucuronic or L-iduronic acid and the galactosamine can be O-sulfated, single-residue changes can alter chain flexibility and ligand binding. Such models are valuable for separating enzymatic activity from scaffolding functions of the core protein.
Knock-in
Knock-in of epitope tags or fluorescent reporters into endogenous core protein loci enables tracking of dermatan sulfate proteoglycan synthesis, secretion, and endocytic degradation in real time. This is particularly useful for studying the lysosomal degradation route demonstrated for endocytosed dermatan sulfate proteoglycan in human fibroblasts. Tagged knock-in lines also facilitate immunoprecipitation and interactome analysis.
Overexpression
Overexpression of decorin or endocan can test sufficiency for matrix remodeling and signaling outcomes. Endocan overexpression in endothelial cells can model the elevated circulating proteoglycan levels observed in vascular disease. Decorin overexpression may protect against atrophy and fibrosis by enhancing ITGB1/Akt/mTOR regulation. Overexpression systems complement loss-of-function models to establish causality.
How EDITGENE Supports dermatan sulfate proteoglycan metabolic process Research
Researchers studying dermatan sulfate proteoglycan metabolic process-related genes often need to determine whether a candidate gene is causally involved in matrix synthesis, secretion, or degradation rather than merely correlated with a phenotype. Rigorous causal inference requires isogenic cell models in which a single gene is knocked out, mutated, tagged, or overexpressed, followed by biochemical and imaging readouts of proteoglycan metabolism.
Contact EDITGENE today to design your custom CRISPR model for dermatan sulfate proteoglycan metabolic process research.
Frequently Asked Questions About dermatan sulfate proteoglycan metabolic process
What is GO:0050655 dermatan sulfate proteoglycan metabolic process?
GO:0050655 is a Gene Ontology biological process term describing the chemical reactions and pathways involving dermatan sulfate proteoglycans, which consist of a core protein linked to a dermatan sulfate glycosaminoglycan chain.
What genes are involved in dermatan sulfate proteoglycan metabolic process?
Key genes include DCN encoding decorin, ESM1 encoding endocan, and glycosaminoglycan biosynthetic enzymes such as DSE, CHST, XYLT1, XYLT2, CHSY1, and CHPF that build and modify the dermatan sulfate chain.
What is the structure of a dermatan sulfate proteoglycan?
It consists of a core protein linked to a dermatan sulfate chain composed of repeating beta-(1,4)-D-hexuronic acid-beta-(1,3)-N-acetyl-D-galactosamine disaccharide units, where the hexuronic acid can be D-glucuronic or L-iduronic acid and the galactosamine can be O-sulfated.
How is dermatan sulfate proteoglycan degraded in cells?
Endocytosed dermatan sulfate proteoglycan is delivered to lysosomes and degraded, as demonstrated in human fibroblasts.
Does the extracellular matrix regulate dermatan sulfate proteoglycan synthesis?
Yes, transfer of fibroblasts to a three-dimensional extracellular environment induces dermatan sulfate proteoglycan and glycosaminoglycan synthesis, showing mechanosensitive regulation.
What is the role of decorin in muscle biology?
Decorin deficiency promotes D-galactose-induced skeletal muscle atrophy and fibrosis by regulating the ITGB1/Akt/mTOR signaling pathway.
What is endocan and why is it important?
Endocan is a circulating dermatan sulfate proteoglycan used as a biomarker of endothelial activation and disease severity.
How do hormones affect proteoglycan metabolism?
1,25-Dihydroxyvitamin D3 inhibits synthesis and enhances degradation of proteoglycans in osteoblastic cells, demonstrating hormonal control of the pathway.
Where are dermatan sulfate proteoglycans found in tissues?
They are found in the extracellular matrix of many tissues, including the central nervous system and mineralized tissues such as porcine tooth-germ dentin.
How can CRISPR help study dermatan sulfate proteoglycan metabolic process?
CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of genes such as DCN, ESM1, DSE, and CHST in proteoglycan synthesis, secretion, and degradation.
Conclusion
GO:0050655 dermatan sulfate proteoglycan metabolic process captures a dynamic and biologically important pathway that spans core protein synthesis, glycosaminoglycan chain assembly, matrix secretion, and lysosomal degradation. Its components, including decorin and endocan, are directly implicated in muscle atrophy, fibrosis, and vascular disease, making the pathway a fertile ground for functional genomics and therapeutic target discovery. By combining biochemical assays, imaging, transcriptomics, and CRISPR-based causal models, researchers can dissect how individual genes control dermatan sulfate proteoglycan metabolism and translate those findings into disease-relevant insights.
References
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- 2. Hoppe W et al.. 1988. Degradation of endocytosed dermatan sulfate proteoglycan in human fibroblasts.. J Biol Chem 263(12):5926-32 PMID: 3356710
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- 4. Kali A et al.. 2014. Endocan: a novel circulating proteoglycan.. Indian J Pharmacol 46(6):579-83 PMID: 25538326
- 5. Takeuchi Y et al.. 1989. 1,25-Dihydroxyvitamin D3 inhibits synthesis and enhances degradation of proteoglycans in osteoblastic cells.. J Biol Chem 264(31):18407-13 PMID: 2808381
- 6. Couchman JR et al.. 1985. Characterization of a dermatan sulfate proteoglycan synthesized by murine parietal yolk sac (PYS-2) cells.. J Biol Chem 260(25):13755-62 PMID: 4055755
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- 8. Lee PH et al.. 2004. Dermatan sulfate proteoglycan and glycosaminoglycan synthesis is induced in fibroblasts by transfer to a three-dimensional extracellular environment.. J Biol Chem 279(47):48640-6 PMID: 15347686
