Recombinant Human GMDS Protein: Properties & Research Uses

Recombinant Human GMDS Protein is a recombinant form of the human GDP-mannose 4,6-dehydratase enzyme that plays an essential role in the de novo biosynthesis of GDP-fucose and has emerging significance in glycobiology, tumor biology, and related biochemical research.

Protein Name

Recombinant Human GMDS Protein

Gene Name

GMDS (GDP-mannose 4,6-dehydratase)

Biological Function

Catalyzes the first step in the de novo synthesis of GDP-fucose from GDP-mannose

Research Relevance

Implicated in fucosylation regulation, tumor immune evasion, and glycan biosynthesis

Product SKU

rp371602

Expression System

Recombinant (expression system details should be verified from product datasheet)

What Is GMDS and Why Does It Matter?

GMDS (GDP-mannose 4,6-dehydratase) is an enzyme encoded by the GMDS gene in humans. It catalyzes the conversion of GDP-D-mannose to GDP-4-keto-6-deoxy-D-mannose, which is the committed first step in the de novo biosynthesis of GDP-L-fucose. Fucose is a monosaccharide that is incorporated into a wide variety of glycoproteins and glycolipids through the process of fucosylation.

Fucosylation is a critical post-translational modification that modulates numerous biological processes, including cell adhesion, immune response, selectin-mediated leukocyte trafficking, and cancer progression. Because GMDS controls the availability of the activated fucose donor GDP-fucose, it acts as a key regulatory node in the fucosylation pathway. Disruption or downregulation of GMDS expression has been linked to impaired fucosylation, altered tumor antigen presentation, and modulation of immune checkpoint responses.

Biochemical Properties of Recombinant Human GMDS Protein

Recombinant Human GMDS Protein is produced to support in vitro biochemical and cell biology research. As a recombinant enzyme, it retains the catalytic activity of the native GMDS enzyme and is suitable for enzyme kinetics assays, substrate binding studies, and inhibitor screening applications.

Key biochemical characteristics of GMDS include its requirement for NAD⁺ as a cofactor, which is transiently used and regenerated during the catalytic cycle. The enzyme functions as part of the early fucose biosynthesis pathway and has been studied in the context of both normal tissue glycobiology and disease-associated dysregulation. Researchers should consult the specific product datasheet for Recombinant Human GMDS Protein (SKU: rp371602) to obtain verified details on purity, formulation, molecular weight, activity specifications, and storage conditions.

Research Applications

Recombinant Human GMDS Protein supports a range of research applications in glycobiology, cancer immunology, and biochemistry:

• Fucosylation pathway studies: Used to investigate the regulation and flux of the de novo GDP-fucose biosynthesis pathway and its downstream effects on protein fucosylation.
• Enzyme activity and kinetics assays: Suitable as a positive control or active reagent in GMDS enzyme activity assays measuring NAD⁺-dependent dehydratase activity.
• Inhibitor screening: Applicable in drug discovery programs targeting GMDS to modulate fucosylation in cancer or immune diseases.
• Cancer and immune biology research: GMDS loss-of-function has been associated with tumor immune evasion by reducing NK cell-mediated and TRAIL-dependent cytotoxicity; recombinant GMDS supports mechanistic studies in this context.
• Protein interaction studies: Can be used in pull-down assays or co-immunoprecipitation studies to identify binding partners within the fucose biosynthesis complex.

Handling, Storage, and Quality Considerations

To maintain the activity and integrity of Recombinant Human GMDS Protein, researchers should adhere to the storage and handling guidelines provided on the product datasheet. General best practices for recombinant proteins apply:

• Avoid repeated freeze-thaw cycles, which can denature the protein and reduce enzymatic activity.
• Store aliquots at the recommended temperature (typically −20°C or −80°C, as specified on the datasheet).
• Centrifuge the vial briefly before opening to consolidate the contents.
• Use appropriate protein stabilization buffers as indicated in the product documentation.

Purity, biological activity, and endotoxin levels are critical quality attributes. Researchers should verify these parameters on the certificate of analysis (CoA) supplied with each lot of rp371602. For questions about lot-specific quality data, contact Aladdin Scientific technical support.

Frequently asked questions

What is the biological function of the GMDS enzyme?

GMDS (GDP-mannose 4,6-dehydratase) catalyzes the conversion of GDP-D-mannose to GDP-4-keto-6-deoxy-D-mannose, which is the first committed step in the de novo biosynthesis of GDP-L-fucose. This reaction is essential for supplying the activated sugar donor required for fucosylation of glycoproteins and glycolipids.

What research applications is Recombinant Human GMDS Protein suitable for?

Recombinant Human GMDS Protein is suitable for enzyme activity assays, inhibitor screening, fucosylation pathway studies, protein-protein interaction research, and mechanistic studies of cancer immune evasion. It serves as a valuable reagent for both basic glycobiology research and translational cancer immunology investigations.

How should Recombinant Human GMDS Protein be stored to preserve activity?

Recombinant Human GMDS Protein should be stored according to the conditions specified on the product datasheet, typically at −20°C or −80°C. Repeated freeze-thaw cycles should be avoided by preparing single-use aliquots. Always refer to the certificate of analysis for lot-specific recommendations.

What cofactor does GMDS require for its enzymatic activity?

GMDS requires NAD⁺ as a cofactor. NAD⁺ participates transiently in the catalytic mechanism but is regenerated during the reaction cycle, meaning the enzyme does not consume stoichiometric amounts of NAD⁺ under normal turnover conditions.

Is Recombinant Human GMDS Protein relevant to cancer research?

Yes. Loss-of-function mutations or downregulation of GMDS have been associated with impaired fucosylation on cancer cell surfaces, which can reduce TRAIL-dependent cytotoxicity and NK cell-mediated killing, thereby facilitating tumor immune evasion. Recombinant Human GMDS Protein is a useful tool for mechanistic studies exploring these relationships.

References

1. Nakayama K. Fucose: biosynthesis and biological function in mammals. Glycobiology. 2002;12(6):119R-126R.
2. Ohyama C, et al. Molecular cloning and expression of GDP-D-mannose-4,6-dehydratase, a key enzyme for fucose metabolism defects in colorectal cancer. EMBO J. 1998.
3. Kudo T, et al. Loss of GDP-fucose synthesis in colorectal cancer caused by mutations in GDP-D-mannose-4,6-dehydratase (GMDS) gene. Cancer Research. 1998.
4. Aladdin Scientific. Recombinant Human GMDS Protein, SKU rp371602. Product Datasheet.

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.