GO:0180047 dolichol phosphate mannose biosynthetic process: Glycosylation Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0180047 describes the biosynthesis of dolichol phosphate mannose (Dol-P-Man), a lipid-linked mannose donor essential for protein glycosylation.
• Dol-P-Man is synthesized by dolichol-phosphate mannose synthase (DPMS), a glycosyltransferase that transfers mannose from GDP-mannose to dolichol phosphate.
• DPMS is conserved from yeast to humans and exists as a multimeric enzyme in Candida albicans and other organisms.
• Dol-P-Man is required for N-glycosylation, O-mannosylation, and glycosylphosphatidylinositol (GPI) anchor biosynthesis.
• Defects in Dol-P-Man biosynthesis impair cell wall integrity and virulence in fungal pathogens such as Candida albicans.
• Research tools include CRISPR knockout, point mutation, and overexpression models to study DPMS function and glycosylation pathways.
Description
Dolichol phosphate mannose (Dol-P-Man) is a lipid-linked sugar donor that plays a central role in protein glycosylation across eukaryotes. The biosynthetic process that produces Dol-P-Man, designated by the Gene Ontology term GO:0180047 (dolichol phosphate mannose biosynthetic process), encompasses the enzymatic steps that convert GDP-mannose and dolichol phosphate into Dol-P-Man. This process is essential for the proper assembly of N-linked glycans, O-mannosylation, and glycosylphosphatidylinositol (GPI) anchors, which are critical for protein folding, stability, and cell surface interactions. Researchers studying glycosylation-related diseases, fungal pathogenesis, and congenital disorders of glycosylation require a detailed understanding of this pathway. The enzyme dolichol-phosphate mannose synthase (DPMS) catalyzes the key transfer reaction and is conserved from yeast to humans. In pathogenic fungi like Candida albicans, DPMS is a multimeric enzyme and a potential antifungal target. This article provides a comprehensive overview of GO:0180047, including its definition, molecular mechanism, key genes, disease relevance, and experimental models for research.
dolichol phosphate mannose biosynthetic process At A Glance
| GO ID | GO:0180047 |
|---|---|
| GO term | dolichol phosphate mannose biosynthetic process |
| Ontology | biological_process |
| Synonym | dolichol phosphate mannose biosynthesis; dolichol-P-mannose biosynthesis; Dol-P-Man biosynthesis |
| Major function | Synthesis of dolichol phosphate mannose, a mannose donor for protein glycosylation |
| Key enzyme | Dolichol-phosphate mannose synthase (DPMS) |
| Substrates | GDP-mannose and dolichol phosphate |
| Product | Dolichol phosphate mannose (Dol-P-Man) |
| Cellular location | Endoplasmic reticulum membrane |
| Pathway context | N-glycosylation, O-mannosylation, GPI anchor biosynthesis |
What Is GO:0180047?
GO:0180047, dolichol phosphate mannose biosynthetic process, is defined as the chemical reactions and pathways resulting in the formation of dolichol phosphate mannose (Dol-P-Man). This process involves the transfer of mannose from GDP-mannose to dolichol phosphate, catalyzed by dolichol-phosphate mannose synthase (DPMS). Dol-P-Man serves as a mannose donor for various glycosylation reactions in the endoplasmic reticulum and is essential for the biosynthesis of N-glycans, O-mannosylated proteins, and GPI anchors.
Why Is dolichol phosphate mannose biosynthetic process Important in Cell Biology?
The dolichol phosphate mannose biosynthetic process is fundamental to eukaryotic protein glycosylation, influencing protein folding, stability, and cell-cell recognition. Disruptions in this pathway lead to congenital disorders of glycosylation and impair fungal virulence, making it a target for antifungal drug development. Understanding GO:0180047 is therefore critical for researchers in glycobiology, infectious disease, and therapeutic development.
• Provides the essential mannose donor Dol-P-Man for N-glycosylation, O-mannosylation, and GPI anchor synthesis.
• Mutations in DPMS or related genes cause congenital disorders of glycosylation with multisystem symptoms.
• Fungal DPMS is required for cell wall integrity and virulence in Candida albicans.
• Dol-P-Man biosynthesis is conserved across eukaryotes, enabling model organism studies.
• The pathway is a potential target for antifungal and anticancer therapies.
• Research on GO:0180047 informs biotechnological production of glycoproteins.
• Dol-P-Man is involved in the quality control of protein folding in the endoplasmic reticulum.
• Defects in glycosylation affect immune recognition and host-pathogen interactions.
• DPMS multimerization regulates enzyme activity and is studied in pathogenic yeasts.
• CRISPR-based models allow precise dissection of DPMS function in health and disease.
What Happens During dolichol phosphate mannose biosynthetic process?
Substrate recognition and binding
In simple terms: The enzyme grabs its raw materials: GDP-mannose and dolichol phosphate.
Dolichol-phosphate mannose synthase (DPMS) binds GDP-mannose and dolichol phosphate in the endoplasmic reticulum membrane. The enzyme recognizes the polyprenol chain of dolichol phosphate and the nucleotide sugar, positioning them for catalysis. This step is conserved across eukaryotes and is essential for subsequent mannose transfer.
Mannose transfer and Dol-P-Man formation
In simple terms: The enzyme moves mannose from GDP-mannose onto dolichol phosphate, creating Dol-P-Man.
DPMS catalyzes the transfer of mannose from GDP-mannose to dolichol phosphate, releasing GDP and forming dolichol phosphate mannose (Dol-P-Man). This glycosyltransferase reaction is stereospecific and requires divalent cations. The product Dol-P-Man remains membrane-associated and serves as a mannose donor for various glycosylation reactions.
Multimeric enzyme assembly and regulation
In simple terms: The enzyme works as a team of subunits, and its assembly can affect how well it functions.
In Candida albicans, DPMS is a multimeric enzyme, and its oligomeric state may regulate activity. The enzyme complex is anchored in the endoplasmic reticulum membrane and interacts with other glycosylation machinery. Regulation of DPMS expression and assembly impacts the flux of Dol-P-Man production.
Dol-P-Man utilization in glycosylation pathways
In simple terms: Dol-P-Man is used as a building block for attaching sugars to proteins.
Dol-P-Man donates mannose for N-glycan precursor assembly, O-mannosylation of proteins, and GPI anchor biosynthesis. These glycosylation events are critical for protein folding, stability, and cell surface functions. Defects in Dol-P-Man utilization lead to glycosylation disorders.
Key Genes Involved in GO:0180047 dolichol phosphate mannose biosynthetic process
The following genes and proteins are directly involved in or regulate the dolichol phosphate mannose biosynthetic process (GO:0180047).
| Gene | Major Role | Research Relevance |
|---|---|---|
| DPM1 | Catalytic subunit of DPMS; transfers mannose to dolichol phosphate | Mutations cause congenital disorder of glycosylation; target for functional studies |
| DPM2 | Regulatory subunit of DPMS; stabilizes the enzyme complex | Modulates DPMS activity; studied in glycosylation disorders |
| DPM3 | Stabilizing subunit of DPMS; anchors enzyme in ER membrane | Required for DPMS function; linked to muscular dystrophy |
| ALG1 | Mannosyltransferase that uses Dol-P-Man in N-glycan synthesis | Defects cause ALG1-CDG; research model for glycosylation |
| PIGB | Involved in GPI anchor biosynthesis using Dol-P-Man | Mutations cause GPI deficiency disorders |
| POMT1 | O-mannosyltransferase that uses Dol-P-Man | Defects cause Walker-Warburg syndrome |
| POMT2 | O-mannosyltransferase partner of POMT1 | Mutations linked to muscular dystrophies |
| DPM1 (Candida albicans) | Essential for cell wall mannoproteins and virulence | Antifungal target; studied in fungal pathogenesis |
| DPM2 (Candida albicans) | Regulatory subunit in Candida | Potential antifungal target |
| DPM3 (Candida albicans) | Stabilizing subunit in Candida | Involved in enzyme multimerization |
| MPDU1 | Mannose-P-dolichol utilization defect 1; facilitates Dol-P-Man use | Mutations cause CDG; research on Dol-P-Man trafficking |
| SEC59 | Dolichol kinase; provides dolichol phosphate for DPMS | Regulates substrate availability |
| DOLK | Dolichol kinase in humans; activates dolichol to dolichol phosphate | Mutations cause CDG; upstream of DPMS |
| GDP-Mannose transporter (SLC35C1) | Transports GDP-mannose into ER | Affects substrate supply for DPMS |
| PMT4 (fungal) | Protein O-mannosyltransferase that uses Dol-P-Man | Structural studies reveal homodimer architecture |
| C2orf74 | Uncharacterized gene potentially linked to glycosylation | May influence metabolic pathways; further research needed |
How Is dolichol phosphate mannose biosynthetic process Regulated?
The dolichol phosphate mannose biosynthetic process is regulated at multiple levels. DPMS enzyme activity is influenced by its multimeric assembly, as shown in Candida albicans where the enzyme forms multimers. Substrate availability, including dolichol phosphate and GDP-mannose, controls flux through the pathway. Additionally, expression of DPMS subunits can be modulated in response to cellular stress and glycosylation demand. The pathway intersects with broader glycosylation regulation, including feedback from N-glycan precursors.
dolichol phosphate mannose biosynthetic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DPM1 | Congenital disorder of glycosylation (CDG) | CRISPR knockout in HEK293 cells; patient fibroblasts |
| DPM2 | CDG with seizures and developmental delay | Knockout zebrafish; mouse models |
| DPM3 | Muscular dystrophy and CDG | Knock-in mouse with patient mutation |
| POMT1 | Walker-Warburg syndrome | CRISPR point mutation in muscle cells |
| Candida albicans DPM1 | Fungal virulence and cell wall integrity | CRISPR knockout in Candida albicans |
Congenital Disorders of Glycosylation (CDG)
Mutations in DPMS subunits (DPM1, DPM2, DPM3) cause congenital disorders of glycosylation, characterized by developmental delay, seizures, and multisystem abnormalities. These disorders highlight the critical role of Dol-P-Man biosynthesis in human health. Research using patient-derived cells and model organisms has elucidated the molecular basis of these defects.
Fungal Pathogenesis and Antifungal Targets
In Candida albicans, DPMS is essential for cell wall mannoprotein biosynthesis and virulence. The multimeric nature of the enzyme is important for its function, and targeting DPMS could provide new antifungal strategies. Studies in fungal models reveal how Dol-P-Man biosynthesis contributes to host-pathogen interactions.
Muscular Dystrophies and Neuronal Migration Disorders
Defects in O-mannosylation, which depends on Dol-P-Man, cause muscular dystrophies such as Walker-Warburg syndrome. POMT1 and POMT2 mutations impair O-mannosyltransferase activity, leading to abnormal glycosylation of alpha-dystroglycan and muscle degeneration. These conditions underscore the importance of Dol-P-Man in tissue development.
From dolichol phosphate mannose biosynthetic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| What is the effect of DPMS loss on glycosylation? | CRISPR knockout of DPM1 in HEK293 or HeLa cells |
| How do patient mutations affect DPMS activity? | Point mutation knock-in of DPM1 variants |
| Can we tag DPMS for localization studies? | Knock-in of fluorescent tag (e.g., GFP) at DPM1 locus |
| Does overexpression of DPMS increase Dol-P-Man levels? | Overexpression of DPM1/DPM2/DPM3 in mammalian cells |
| What is the role of DPMS in fungal virulence? | CRISPR knockout in Candida albicans |
| How does DPMS multimerization affect function? | Knock-in of dimerization mutants in Candida |
How to Study the dolichol phosphate mannose biosynthetic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Mass spectrometry | Glycan structures and site occupancy | Analyzing N-glycans and O-mannosylation in DPMS mutants |
| Enzymatic assay | DPMS catalytic activity | Characterizing mutant enzymes and inhibitors |
| CRISPR knockout screening | Gene essentiality and pathway interactions | Identifying novel regulators of Dol-P-Man biosynthesis |
| Western blot | Protein expression and stability | Validating DPMS subunit levels |
| Fluorescence microscopy | Subcellular localization | Visualizing DPMS in the ER |
| Flow cytometry | Cell surface glycosylation | Measuring GPI-anchored protein display |
| RNA-seq | Transcriptional changes | Assessing glycosylation gene expression |
| Co-immunoprecipitation | Protein-protein interactions | Identifying DPMS complex components |
Glycosylation Analysis by Mass Spectrometry
Mass spectrometry-based glycomics and glycoproteomics can quantify Dol-P-Man-dependent glycosylation structures on proteins. This method reveals changes in N-glycans, O-mannosylation, and GPI anchors upon DPMS perturbation.
Enzymatic Activity Assays
In vitro DPMS activity assays using radiolabeled GDP-mannose and dolichol phosphate measure the conversion to Dol-P-Man. These assays are used to characterize mutant enzymes and screen inhibitors.
CRISPR Screening for Glycosylation Genes
Genome-wide CRISPR knockout screens can identify genes required for Dol-P-Man biosynthesis and utilization. Such screens link DPMS to broader cellular pathways and disease phenotypes.
Fluorescence Microscopy and Subcellular Localization
Tagged DPMS subunits (e.g., GFP) enable live-cell imaging of endoplasmic reticulum localization and trafficking. Co-localization with glycosylation markers confirms compartmentalization.
How CRISPR Can Be Used to Study GO:0180047 dolichol phosphate mannose biosynthetic process
Knockout
CRISPR knockout of DPM1, DPM2, or DPM3 in mammalian cells abolishes Dol-P-Man biosynthesis, leading to glycosylation defects and ER stress. These models are used to study the consequences of loss of function and to validate drug targets.
Point Mutation
CRISPR-mediated point mutations can recreate patient-specific missense mutations in DPMS subunits, allowing functional analysis of disease variants. Such models help dissect the molecular mechanisms of congenital disorders of glycosylation.
Knock-in
Knock-in of epitope tags or fluorescent proteins at the endogenous DPM1 locus enables real-time tracking of DPMS localization and interactions. This approach preserves native regulation and expression levels.
Overexpression
CRISPR activation or cDNA overexpression of DPMS subunits increases Dol-P-Man production, useful for studying pathway saturation and for biotechnological applications. Overexpression models can also rescue glycosylation defects.
How EDITGENE Supports dolichol phosphate mannose biosynthetic process Research
Researchers studying dolichol phosphate mannose biosynthetic process-related genes often need to determine whether a candidate gene is causally involved in glycosylation, disease, or fungal virulence. EDITGENE provides comprehensive CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for dolichol phosphate mannose biosynthetic process research.
Frequently Asked Questions About dolichol phosphate mannose biosynthetic process
What is dolichol phosphate mannose biosynthetic process?
It is the metabolic pathway that produces dolichol phosphate mannose (Dol-P-Man), a mannose donor required for protein glycosylation, defined by GO:0180047.
What genes are involved in dolichol phosphate mannose biosynthetic process?
Key genes include DPM1, DPM2, and DPM3, which encode subunits of dolichol-phosphate mannose synthase (DPMS).
What is the function of DPMS?
DPMS catalyzes the transfer of mannose from GDP-mannose to dolichol phosphate, forming Dol-P-Man.
Which diseases are linked to defects in Dol-P-Man biosynthesis?
Mutations in DPMS subunits cause congenital disorders of glycosylation, and defects in Dol-P-Man utilization lead to muscular dystrophies.
How is dolichol phosphate mannose biosynthetic process regulated?
It is regulated by enzyme multimerization, substrate availability, and cellular glycosylation demand.
What experimental models are used to study GO:0180047?
CRISPR knockout, point mutation, knock-in, and overexpression models in human cells and Candida albicans are commonly used.
Why is Dol-P-Man important for fungal virulence?
In Candida albicans, Dol-P-Man is essential for cell wall mannoproteins and virulence, making DPMS a potential antifungal target.
What methods measure Dol-P-Man biosynthesis?
Enzymatic assays with radiolabeled GDP-mannose and mass spectrometry of glycans are standard methods.
Can CRISPR be used to study dolichol phosphate mannose biosynthetic process?
Yes, CRISPR knockout and knock-in models enable precise dissection of DPMS gene function and disease variants.
What is the relationship between Dol-P-Man and N-glycosylation?
Dol-P-Man provides mannose residues for the N-glycan precursor, which is essential for protein folding and function.
Conclusion
The dolichol phosphate mannose biosynthetic process (GO:0180047) is a conserved and essential pathway for protein glycosylation in eukaryotes. Its central enzyme, DPMS, and its product, Dol-P-Man, are critical for N-glycosylation, O-mannosylation, and GPI anchor biosynthesis. Defects in this pathway cause human diseases and impair fungal virulence, highlighting its biomedical importance. Continued research using CRISPR models and advanced glycoproteomics will further illuminate its roles and therapeutic potential.
References
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- 3. Eichler J et al.. 2018. Stereochemical Divergence of Polyprenol Phosphate Glycosyltransferases.. Trends Biochem Sci 43(1):10-17 PMID: 29183665
- 5. McDowell MA et al.. 2025. Structural characterisation of the fungal Pmt4 homodimer.. Nat Commun 16(1):11134 PMID: 41392315
- 6. Mora-Montes HM et al.. 2009. Protein glycosylation in Candida.. Future Microbiol 4(9):1167-83 PMID: 19895219
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- 8. Zhao L et al.. 2026. C2orf74 orchestrates germ-Leydig crosstalk to inhibit white adipose tissue browning in male mice.. Nat Commun 17(1) PMID: 42168221
