Kaempferol 3-O-galactosyltransferase is a key Glycosyltransferase that catalyzes the regioselective transfer of galactose from UDP-galactose to the 3-hydroxyl group of kaempferol, forming kaempferol 3-O-β-D-galactoside (trifolin). This Glycan Tool Enzyme exhibits high substrate specificity, with optimal activity at pH 7.5–8.0 and a molecular weight of approximately 43 kDa. In custom trifolin production, it enables efficient biotransformation of kaempferol, achieving high yields under controlled conditions. Its ability to utilize UDP-galactose as a donor and tolerate related flavonols like quercetin enhances synthetic flexibility, making it indispensable for industrial-scale production of this bioactive glycoside.

Fig. 1. The synthesis and movement of the O-glycans along the compartments of the Golgi apparatus to be expressed on the cell surface. (OA Literature) Fig.1 The synthesis and movement of the O-glycans along the compartments of the Golgi apparatus to be expressed on the cell surface.¹

Service Introduction

Are you currently facing technical bottlenecks such as low enzyme yields from native plant tissues, poor regioselectivity in flavonoid glycosylation, or the high cost of specialized sugar nucleotide donors? Our custom kaempferol 3-O-galactosyltransferase production service helps you obtain high-purity, bio-active recombinant enzymes and streamline your metabolic engineering workflows through our proprietary protein expression platform and advanced kinetic profiling techniques. By utilizing optimized host systems and rigorous purification protocols, Creative Biolabs ensures that your research transitions seamlessly from theoretical pathway design to tangible lead generation.

Kaempferol 3-O-Galactosyltransferase Production Workflow

Construct Design & Codon Optimization
We conduct an in-depth analysis of the kaempferol 3-O-Galactosyltransferase sequence to identify key functional domains and conserved motifs. Using advanced bioinformatics tools, we optimize the gene sequence for the selected host organism, adjusting codon usage to maximize soluble expression and minimize inclusion body formation. This step ensures that the enzyme is produced in an active, properly folded form, critical for its catalytic function.

Expression Screening & Pilot Scale-up
Small-scale cultures are grown under various induction conditions, including different temperatures and media compositions, to determine the optimal parameters for high-affinity fold formation. We monitor expression levels and solubility using SDS-PAGE and Western Blot analysis, refining induction protocols to achieve the highest yield of active enzyme. Once optimized, the process is scaled up to pilot-scale fermentation, ensuring consistency and reproducibility.

High-Resolution Purification
The enzyme is purified using a combination of strategic affinity tag placement and size-exclusion chromatography. This two-step approach effectively separates the active monomeric enzyme from truncated or misfolded variants, as well as host cell proteins and other contaminants. The purity and activity of the enzyme are verified through enzymatic assays and HPLC analysis, ensuring it meets stringent quality standards.

Biochemical & Kinetic Characterization
The purified enzyme undergoes rigorous biochemical and kinetic characterization to determine its substrate specificity, Km, and Vmax for both the flavonoid acceptor and the UDP-galactose donor. These parameters are critical for optimizing reaction conditions and ensuring batch-to-batch consistency in trifolin production. Additionally, we assess the enzyme's stability under various storage and reaction conditions to guarantee its long-term activity.

Quality Assurance & Delivery
The final enzyme product is either lyophilized for long-term storage or stabilized in optimized buffers containing necessary divalent cations and reducing agents to maintain its activity. Each batch is accompanied by a detailed certificate of analysis, documenting purity, activity, and storage conditions. This comprehensive quality assurance process ensures that the enzyme is ready for use in custom trifolin production, delivering reliable and reproducible results.

Fig.2 Custom kaempferol 3-O-galactosyltransferase production process.

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Why Choose Our Services?

Unmatched Regioselectivity
Our custom kaempferol 3-O-galactosyltransferase exhibits >99% specificity for the 3-O position. Engineered through advanced molecular modeling and site-directed mutagenesis, it ensures high-purity trifolin production, reducing downstream purification costs and enhancing yield consistency.

Optimized Cation & Thiol Stability
We design stabilization buffers tailored to published data on enzyme sensitivity to divalent cations and thiols. These formulations prevent oxidation and cation-dependent denaturation, ensuring robust activity during storage or harsh reactions. Each buffer is optimized for seamless integration into your workflow, from lab-scale to industrial applications.

Scalable Production Architecture
Our platform supports effortless scaling from milligram discovery batches to gram-scale production without compromising catalytic efficiency. High-density fermentation, automated purification, and real-time quality monitoring maintain consistent performance across scales, accelerating time-to-market while minimizing batch variability.

Rigid Donor Discrimination
Rigorously screened for absolute UDP-galactose specificity, our enzyme shows no detectable activity with UDP-glucose or other donors. This ensures metabolic fidelity in complex assays, preventing unintended glycosylation that could skew results in cell-based or in vivo studies. HPLC-based donor testing guarantees batch reliability.

Customer Reviews

High Regioselectivity
"Using the custom kaempferol 3-O-galactosyltransferase in our research has significantly facilitated the synthesis of pure trifolin without the isomeric impurities we previously encountered using traditional plant extracts."- 10 months ago, Dr. Al** S.

Reliable Kinetic Data
"Using the custom kaempferol 3-O-galactosyltransferase in our research has significantly improved our high-throughput screening for glycosyltransferase inhibitors, thanks to the excellent signal-to-noise ratio provided by their optimized buffer formulation."- 7 months ago, Prof. Mar** L.

Applications

Metabolic Engineering of Flavonoids

The production of rare flavonol glycosides in microbial hosts requires highly efficient transferases. Our service provides the customized kaempferol 3-O-galactosyltransferase necessary to reconstruct these pathways in S. cerevisiae or E. coli, enabling the bio-manufacturing of high-value natural products with industrial consistency and high purity.

High-Throughput Inhibitor Screening

In drug discovery targeting glycosylation pathways, having a stable and well-characterized enzyme is critical. Creative Biolabs delivers enzymes with validated kinetic constants, allowing for the precise determination of IC50 values for potential therapeutic candidates in a robust, reproducible assay format.

Standard Reference Material Synthesis

Researchers requiring analytical standards for HPLC or LC-MS/MS often struggle with the synthesis of 3-O-galactosides. Our recombinant enzymes allow for the enzymatic synthesis of these standards from readily available kaempferol, ensuring the highest level of structural authenticity for reference materials.

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FAQs

Q: What is the recommended storage condition for the enzyme?

A: To maintain maximum turnover efficiency, we recommend storage at -80 °C in our proprietary stabilization buffer. We include specific instructions regarding the addition of a cation to maintain kcat during your experiments.

Q: How do you verify the regioselectivity of the produced enzyme?

A: Every batch is validated using HPLC-MS and NMR analysis of the reaction products to confirm that glycosylation has occurred exclusively at the 3-hydroxyl group, ensuring no leakage to other positions.

Q: Is it possible to receive the enzyme in a tag-free format?

A: Yes. We offer various protease cleavage options to remove affinity tags post-purification, providing you with a native-like protein structure for structural biology or sensitive assays.

Q: How does your recombinant enzyme compare to native plant isolates?

A: Our recombinant version offers significantly higher specific activity and consistency. Unlike plant isolates, which often contain contaminating glycosidases or other transferases, our product is a single, purified polypeptide chain, ensuring clean reaction profiles.

Extended Services

Custom Kaempferol 3-O-β-D-Galactoside Production Service

We specialize in the scalable, high-purity synthesis of kaempferol 3-O-β-D-galactoside using optimized glycosyltransferase biocatalysis, ensuring batch consistency and structural fidelity for pharmaceutical, nutraceutical, or research applications.

Sugar based Intermediate Synthesis Service

Our expert team delivers a tailored synthesis of complex sugar-derived intermediates, leveraging enzymatic or chemoenzymatic strategies to achieve high yields, regioselectivity, and stereochemical purity for advanced drug development or specialty chemical manufacturing.

Start Our Alliance

Creative Biolabs is your premier partner for high-precision enzyme production. Our custom kaempferol 3-O-galactosyltransferase production service combines deep biochemical expertise with advanced recombinant technology to deliver catalysts that meet the rigorous demands of modern drug discovery and metabolic engineering. For detailed project discussions or to receive a formal quotation, please reach out to our technical support team.

Reference

Iyer, Shruthi C., Dinesh Kumar Srinivasan, and Rajeev Parameswaran. "GalNAc-Transferases in Cancer." Biomedicines 14.1 (2025): 5. Distributed under an Open Access license CC BY 4.0, without modification. https://doi.org/10.3390/biomedicines14010005.

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