Recombinant Human Fucosyltransferase 5/FUT5 Protein, CF

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Enzyme Activity
Format
Carrier-Free

Order Details

Recombinant Human Fucosyltransferase 5/FUT5 Protein, CF Summary

Additional Information
FUT5 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.
Details of Functionality
Measured by its ability to transfer fucose from GDP-fucose to N-Acetyllactosamine The specific activity is >35 pmol/min/µg, as measured under the described conditions.
Source
Mouse myeloma cell line, NS0-derived human Fucosyltransferase 5/FUT5 protein
Arg35-Thr374, with an N-terminal 6-His tag
Accession #
N-terminal Sequence
His
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Enzymes
Gene
FUT5
Purity
>80%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
40 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
58 kDa, reducing conditions

Packaging, Storage & Formulations

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.
Buffer
Supplied as a 0.2 μm filtered solution in Tris and NaCl.
Purity
>80%, by SDS-PAGE under reducing conditions and visualized by silver stain
Assay Procedure
  • Assay Buffer: 25 mM Tris, 5 mM MnCl2 (supplied in kit), pH 7.5
  • Recombinant Human Fucosyltransferase 5/FUT5 FUT5 (rhFUT5) (Catalog # 4949-GT)
  • Donor Substrate: GDP-Fucose (Sigma, Catalog # G4401), 1.6 mM stock in deionized water
  • Acceptor Substrate: Lactosamine (V-Labs, Catalog # GN204), 50 mM 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 GDP-Fucose to 240 μM in Assay Buffer.
  2. Dilute Lactosamine to 2.4 mM in Assay Buffer.
  3. Dilute Coupling Phosphatase 1 to 12 μg/mL in Assay Buffer.
  4. Prepare reaction mixture by combining equal volumes of diluted GDP-Fucose, Lactosamine, and Coupling Phosphatase 1.
  5. Dilute rhFUT5 to 20 µg/mL in Assay Buffer.
  6. 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.
  7. 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.
  8. Load 50 µL of each dilution of the standard curve into a plate. Include a curve blank containing 50 μL of Assay Buffer.
  9. Load 25 µL of the 20 µg/mL rhFUT5 into the plate. Include a Blank Control containing 25 µL of Assay Buffer.
  10. Add 25 µL of reaction mixture (step 4) to the wells, excluding the standard curve and curve blank.
  11. Cover the plate with parafilm or a plate sealer and incubate at 37 ºC for 20 minutes.
  12. Add 30 µL of the Malachite Green Reagent A to all wells. Tap to mix briefly.
  13. Add 100 µL of deionized water to all wells. Tap to mix briefly.
  14. Add 30 µL of the Malachite Green Reagent B to all wells.  Mix and incubate for 20 minutes at room temperature.
  15. Read plate at 620 nm (absorbance) in endpoint mode.
  16. 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 Blank Control.

Per Reaction:
  • rhFUT5: 0.5 µg
  • Coupling Phosphatase 1: 0.1 µg
  • Lactosamine: 400 µM
  • GDP-Fucose: 40 µM

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human Fucosyltransferase 5/FUT5 Protein, CF

  • alpha (1,3) fucosyltransferase
  • alpha-(1,3)-fucosyltransferase
  • EC 2.4.1
  • EC 2.4.1.65
  • fucosyltransferase 5 (alpha (1,3) fucosyltransferase)
  • Fucosyltransferase 5
  • Fucosyltransferase V
  • FUC-TV
  • fucT-V
  • FUT5
  • Galactoside 3-L-fucosyltransferase

Background

Because N-, O-glycans and glycolipids are frequently fucosylated at terminal sites, fucose is often found to be essential for sugar epitope and lectin ligand generation. Well known fucose containing structures include Lewis structures and ABO blood group antigens. Lewis structures are key elements involved in leukocyte homing and extravasation process and thus are essential for lymphocyte maturation and natural defense functions. Fucose containing glycans also play essential roles in cell signaling and development. So far, more than 10 Fucosyltransferases have been cloned from the human genome (1). FUT1 and FUT2 are alpha 1‑2 Fucosyltransferases and are responsible for ABO blood group antigen synthesis. FUT3, FUT4, FUT5, FUT6, FUT7 and FUT9 are alpha 1-3/4 Fucosyltransferases and are responsible for Lewis structure generation. FUT5 has high homology with FUT3 and FUT6 due to gene duplication. FUT7 is exclusively responsible for biosynthesis of sialyl Lewis X epitope in leukocytes and high endothelial venule cells (2). FUT8 is an alpha 1-6 Fucosyltransferase that adds a fucose to the chitobiose core of N-glycans (3). Predicted as type II transmembrane proteins and Golgi enzymes, some of the Fucosyltransferases can also be found in plasma. R&D Systems recombinant human FUTs correspond to the luminal domains. The activity of this enzyme has been measured using a phosphatase-coupled method (4).

  1. Becker, D.J. et al. (2003) Glycobiology 13:41R.
  2. Blander, J. M. et al. (1999) J. Immunol. 163:3746.
  3. Lee, S.H. et al. (2006) J. Biochem. 139:391.
  4. Wu, Z.L. et al. (2010) Glycobiology doi: 10.1093/glycob/cwq187.

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Bioinformatics

Gene Symbol FUT5
Entrez
Uniprot