Recombinant Human SULT1C2 Protein, CF

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Enzyme Activity
Format
Carrier-Free

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Recombinant Human SULT1C2 Protein, CF Summary

Details of Functionality
Measured by its ability to transfer sulfate from PAPS to 4-nitrophenol. The specific activity is >45 pmol/min/μg, as measured under the described conditions.
Source
E. coli-derived human Cytosolic Sulfotransferase 1C2/SULT1C2 protein
Ala2-Leu296, with N-terminal 6-His tag
Accession #
N-terminal Sequence
Inconclusive. Protein identity confirmed by mass spec, His tag confirmed by anti-His Western analysis.
Protein/Peptide Type
Recombinant Enzymes
Gene
SULT1C2
Purity
>80%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
38 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
34-37 kDa, reducing conditions

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -70 °C as supplied.
  • 3 months, -70 °C under sterile conditions after opening.
Buffer
Supplied as a 0.2 μm filtered solution in MES, NaCl and DTT.
Purity
>80%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane
Assay Procedure
  • Assay Buffer (1X Phosphatase Buffer 3): 50 mM Tris, 15 mM MgCl2, pH 7.5
  • Recombinant Human Cytosolic Sulfotransferase 1C2/SULT1C2 (rhSULT1C2) (Catalog # 7458-ST)
  • Coupling Enzyme: Recombinant Mouse IMPAD1 (Catalog # 7028-PD)
  • Adenosine 3′-phosphate 5′-phosphosulfate lithium salt hydrate (PAPS) (Catalog # ES019), 1 mM stock in 5% ethanol, 95% deionized water
  • 4-Nitrophenol (Sigma, Catalog # 241326), 50 mM in deionized water
  • Universal Sulfotransferase Activity Kit (Catalog # EA003)
  • 96-well Clear Plate (Costar, Catalog # 92592)
  • Plate Reader (Model: SpectraMax Plus by Molecular Devices) or equivalent
  1. Dilute Coupling Phosphatase 3 to 0.1 mg/mL in Assay Buffer.
  2. Prepare reaction mixture by combining 50 µL of 0.1 mg/mL Coupling Phosphatase 3, 50 µL of 50 mM 4-Nitrophenol, 50 µL of 1 mM PAPS, and 100 µL of Assay Buffer. This is sufficient to assay 9 wells.
  3. Dilute rhSULT1C2 to 40 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. This is the first point of the standard curve.
  5. Continue standard curve by performing six one-half serial dilutions of the 100 µM Phosphate stock in Assay Buffer. The standard curve has a range of 0.078 to 5.0 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 25 µL of the 40 µg/mL rhSULT1C2 into the plate. Include a control containing 25 µL of Assay Buffer.
  8. Add 25 µL of reaction mixture to the wells, excluding the standard curve.
  9. Seal plate and incubate at 37 °C for 20 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.
  14. 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.

  • rhSULT1C2:  1.0 µg
  • Coupling Phosphatase 3:  0.5 µg
  • 4-Nitrophenol:  5 mM
  • PAPS:  0.1 mM

Notes

Coomassie is a registered trademark of Imperial Chemical Industries Ltd.

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

Alternate Names for Recombinant Human SULT1C2 Protein, CF

  • Cytosolic Sulfotransferase 1C2
  • cytosolic, 1C, member 1
  • EC 2.8.2
  • EC 2.8.2.-
  • EC 2.8.2.1
  • EC 2.8.2.2
  • humSULTC2
  • ST1C1
  • ST1C2
  • Sulfotransferase 1C1
  • sulfotransferase family, cytosolic, 1C, member 2
  • SULT1C#1
  • SULT1C1
  • SULT1C2

Background

Cytosolic sulfotransferases catalyze the sulfonation of many hormones, neurotransmitters, drugs, and xenobiotic compounds. They are distinct from Golgi-resident sulfotransferases by the absence of transmembrane domains and are located in the cytoplasm (1, 2). SULT1C2 is mainly expressed in the gastrointestinal tract (stomach, duodenum, jejunum, ileum, colon, caecum and rectum), liver and kidneys, but not in the lungs (3). In contrast, SULT1C4, a sulfotransferase that is most closely related to SULT1C2 (4), is expressed at higher levels in fetal lung and kidney and at lower levels in fetal heart. So far, SULT1C2 is found to be active only on p-nitrophenol (3). The enzymatic activity of our recombinant human SULT1C2 was determined using a phosphatase-coupled assay (5).
  1. Falany, C. N. (1997) FASEB J. 11:206.
  2. Gamage, N. U. et al. (2006) Toxicol. Sci. 90:5.
  3. Hehonah, N. et al. (1999) Int J. Biochem. Cell. Biol. 31:869.
  4. Sakakibara, Y. et al. (1998) J. Biol. Chem. 273:33929.
  5. Prather, B. et al. (2012) Anal. Biochem. 423:86.

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Bioinformatics

Gene Symbol SULT1C2
Uniprot