Recombinant Human Fucosyltransferase 7/FUT7 Protein, CF

FUT7 has been formulated so that it can be used in the cell surface glycoengineering of living cells, and does not affect cell viability or native phenotype apart from the intended impact on cell glycobiology
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Recombinant Human Fucosyltransferase 7/FUT7 Protein, CF Summary

Learn more about Fluorescent Glycan Labeling and Detection

Product Specifications

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Measured by its ability to transfer fucose from GDP-fucose to fetal bovine fetuin. The specific activity is >175 pmol/min/μg, as measured under the described conditions.
Chinese Hamster Ovary cell line, CHO-derived human Fucosyltransferase 7/FUT7 protein
Ala36-Ala342 with a C-terminal 6‑His tag
Accession #
N-terminal Sequence
Predicted Molecular Mass
36 kDa
40-45 kDa, reducing conditions

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Supplied as a 0.2 μm filtered solution in Tris and NaCl.
Shipping The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -20 to -70 °C as supplied.
  • 3 months, -20 to -70 °C under sterile conditions after opening.

Assay Procedure

  • Assay Buffer: 100 mM Tris, 10 mM MnCl2, 5 mM CaCl2, pH 7.5
  • Recombinant Human Fucosyltransferase 7/FUT7 (rhFUT7) (Catalog # 6409-GT)
  • Donor Substrate: GDP-Fucose (Sigma, Catalog # G4401), 1.6 mM stock in deionized water
  • Acceptor Substrate: Fetuin, from Fetal Bovine Serum (Sigma, Catalog # F3385), 50 mg/mL in deionized water
  • Glycosyltransferase Activity Kit (Catalog # EA001)
  • 96-well Clear Plate (Costar, Catalog # 92592)
  • Plate Reader (Model: SpectraMax Plus by Molecular Devices) or equivalent
  1. Dilute Coupling Phosphatase 1 to 0.1 mg/mL in Assay Buffer.
  2. Prepare reaction mixture by combining 30 µL of 1.6 mM GDP-Fucose, 120 µL of 50 mg/mL Fetuin, 24 µL of 0.1 mg/mL Coupling Phosphatase 1 and 246 µL of Assay Buffer. This volume is sufficient to assay 10 wells.
  3. Dilute rhFUT7 to 5 µg/mL in Assay Buffer.
  4. Dilute 1 mM Phosphate Standard by adding 40 µL of the 1 mM Phosphate Standard to 360 µL of Assay Buffer for a 100 μM stock.
  5. Prepare standard curve by performing seven one-half serial dilutions of the 100 µM Phosphate stock in Assay Buffer. The standard curve has a range of 0.039 to 2.5 nmol per well.
  6. Load 50 µL of each dilution of the standard curve into a plate. Include a curve blank containing 50 μL of Assay Buffer.
  7. Load 15 µL of the 5 µg/mL rhFUT7 into the plate. Include a Control containing 15 µL of Assay Buffer.
  8. Add 35 µL of reaction mixture (step 2) to the wells, excluding the standard curve and curve blank.
  9. Cover the plate with a plate sealer and incubate at 37 °C for 30 minutes.
  10. Add 30 µL of the Malachite Green Reagent A to all wells. Mix briefly.
  11. Add 100 µL of deionized water to all wells. Mix briefly.
  12. Add 30 µL of the Malachite Green Reagent B to all wells. Mix and incubate for 20 minutes at room temperature.
  13. Read plate at 620 nm (absorbance) in endpoint mode.
    Calculate specific activity:

     Specific Activity (pmol/min/µg) =

Phosphate released* (nmol) x (1000 pmol/nmol)
Incubation time (min) x amount of enzyme (µg)

     *Derived from the phosphate standard curve using linear or 4-parameter fitting and adjusted for Control.

Per Reaction:
  • rhFUT7: 0.075 µg
  • Coupling Phosphatase 1: 0.2 µg
  • Fetuin: 500 µg
  • GDP-Fucose: 4000 pmol
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Background: Fucosyltransferase 7/FUT7

Lewis epitopes are key elements involved in the leukocyte homing and extravasation process and thus are important for lymphocyte maturation and natural defense functions. Fucose-containing glycans also play critical roles in cell signaling and development (1). More than 10 fucosyltransferases have been cloned (2). FUT1 and FUT2 are alpha 1-2 fucosyltransferases and are responsible for ABO blood-group antigen synthesis. FUT8 is an alpha 1-6 fucosyltransferase that adds a fucose to the chitobiose core of N-glycans (3). FUT3, FUT4, FUT5, FUT6, FUT7 and FUT9 are alpha 1-3 or alpha 1-4 fucosyltransferases and are responsible for Lewis antigen generation.

FUT7 plays an exclusive role for the biosynthesis of sialy Lewis X (sLeX) epitope (NeuAc alpha 2,3Gal beta 1,4 [Fuc alpha 1,3] GlcNAc) that serves as a ligand in the E-selectin and P-selectin mediated adhesion of leukocytes to activated endothelium or platelets, and it is critical for the extravasation of immune cells (4, 5, 6). The activity of this enzyme has been measured with a phosphatase-coupled method (7).

R&D Systems Recombinant Human FUT7 has been used for the cell surface glycoengineering of several cell types. In both B cells and mesenchymal stem cells, FUT7 generated, cell surface sLeX leads to enhanced engagement with E-Selectin ligands (8, 9). In naïve regulatory T cells (Treg), engineered sLeX promotes homing to areas of inflammation in vivo (10). These studies suggest that FUT7-mediated generation of sLeX has potential to increase the efficacy of cellular-based therapeutics by enhanced targeting of cells to areas of pathology.

  1. Jafar-Nejad, H. et al. (2010) Glycobiology 20:931.
  2. Becker, D.J. et al. (2003) Glycobiology 13:41R.
  3. Lee, S.H. et al. (2006) J. Biochem. 139:391.
  4. Blander, J. M. et al. (1999) J. Immunol. 163:3746.
  5. Natsuka, S. et al. (1994) J. Biol. Chem. 269:16789.
  6. Sasaki, K. et al. (1994) J. Biol. Chem. 269:14730.
  7. Wu, Z.L. et al. (2011) Glycobiology 21:727.
  8. Silva, M. et al. (2017) J. Immunol. 198:3576.
  9. Pachón-Peña, G. et al. (2017) Stem Cells 35:1080.
  10. Donnelly, C. et al. (2018) Sci. Rep. 420:doi:10.1038/s41598-017-17981-z.
Entrez Gene IDs
2529 (Human); 14347 (Mouse); 296564 (Rat)
Alternate Names
alpha-(1,3)-fucosyltransferase; EC 2.4.1; EC 2.4.1.-; EC; FTVII; fucosyltransferase 7 (alpha (1,3) fucosyltransferase); Fucosyltransferase 7; Fucosyltransferase VII; Fuc-TVII; FucT-VII; FUT7; Galactoside 3-L-fucosyltransferase; Selectin ligand synthase; selectin-ligand synthase

Citations for Recombinant Human Fucosyltransferase 7/FUT7 Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

5 Citations: Showing 1 - 5
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  1. Imaging specific cellular glycan structures using glycosyltransferases via click chemistry.
    Authors: Wu Z, Person A, Anderson M, Burroughs B, Tatge T, Khatri K, Zou Y, Wang L, Geders T, Zaia J, Sackstein R
    Glycobiology, 2018-02-01;0(0):.
    Species: Human, Mouse
    Sample Types: Whole Cells
    Applications: Click Chemistry
  2. Optimizing human Treg immunotherapy by Treg subset selection and E-selectin ligand expression
    Authors: C Donnelly, B Dykstra, N Mondal, J Huang, BJ Kaskow, R Griffin, R Sackstein, C Baecher-Al
    Sci Rep, 2018-01-11;8(1):420.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  3. Cell-Specific Variation in E-Selectin Ligand Expression among Human Peripheral Blood Mononuclear Cells: Implications for Immunosurveillance and Pathobiology
    Authors: M Silva, RK Fung, CB Donnelly, PA Videira, R Sackstein
    J. Immunol, 2017-03-22;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  4. A Glycovariant of Human CD44 is Characteristically Expressed on Human Mesenchymal Stem Cells
    Stem Cells, 2017-02-05;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  5. Leukocyte-borne alpha(1,3)-fucose is a negative regulator of beta2-integrin-dependent recruitment in lung inflammation.
    Authors: Buffone A, Nasirikenari M, Manhardt C, Lugade A, Bogner P, Thanavala Y
    J Leukoc Biol, 2016-08-26;101(2):459-470.
    Species: Mouse
    Sample Types: Whole Cells
    Applications: Bioassay


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