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Recombinant Human Active ZAP70 Protein, CF

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The approximate molecular weight is 96 kDa and the average purity is 95%.

Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

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Recombinant Human Active ZAP70 Protein, CF Summary

Details of Functionality
The specific activity of ZAP70 was determined to be 13 nmol/min/mg using a Poly (Glu:Tyr, 4:1) synthetic peptide substrate.
Source
Spodoptera frugiperda, Sf 9 (baculovirus)-derived human ZAP70 protein
Accession #
N-terminal Sequence
Using an N-terminal GST tag
Protein/Peptide Type
Recombinant Proteins
Gene
ZAP70
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane.

Applications/Dilutions

Dilutions
  • Bioactivity
SDS-PAGE
96 kDa
Publications
Read Publications using
3709-KS in the following applications:

Packaging, Storage & Formulations

Storage
This product is stable at ≤ ‑70 °C for up to 1 year from the date of receipt. For optimal storage, aliquot into smaller quantities after centrifugation and store at recommended temperature. Avoid repeated freeze-thaw cycles.
Buffer
Supplied in 50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 10 mM Glutathione, 0.1 mM EDTA, 0.25 mM DTT, 0.1 mM PMSF, 25% Glycerol.
Purity
>90%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane.
Assay Procedure
  • Active Kinase - Active ZAP70 (0.1 μg/μL) diluted with Kinase Dilution Buffer X and assayed as outlined in sample activity plot. Note: These are suggested working dilutions and it is recommended that the researcher perform a serial dilution of Active ZAP70 for optimal results.
  • Kinase Assay Buffer III (5X) - 200 mM Tris-HCl, pH 7.4, 100 mM MgCl2, and 0.5 mg/mL BSA. Add fresh DTT prior to use to a final concentration of 250 μM.
  • Kinase Dilution Buffer X - 40 mM Tris-HCl, pH 7.4, 20 mM MgCl2, 2.5 mM MnCl2, and 0.1 mg/mL BSA. Add fresh DTT prior to use to a final concentration of 50 μM.
  • ADP-Glo™ Kinase Assay Kit - 10 mM of ATP Solution, 10 mM of ADP Solution, ADP-Glo™ Reagent, and Kinase Detection Reagent.
  • Substrate - Poly (4:1 Glu:Tyr) synthetic peptide substrate diluted in 25 mM Tris-HCl to a final concentration of 1 mg/mL.
  • Cofactor: 2.5 M MnCl2 - Diluted in distilled water to a working concentration of 1 M.
  1. Thaw the Active ZAP70, Kinase Assay Buffer III (5X), and Substrate on ice. Prepare a 15 μL enzyme dilution with Kinase Dilution Buffer X at the desired concentration, in a pre-chilled 96-well plate.
  2. Prepare a Substrate/ATP mixture as follows (25 μM ATP example):
    a. 10 mM ATP Solution: 1 μL
    b. Kinase Assay Buffer III (5X): 78 μL
    c. Substrate at 1 mg/mL: 80 μL
    d. 1 M MnCl2: 1 μL
  3. Transfer the following reaction components prepared in Steps 1 and 2 to a 384-well opaque plate, bringing the reaction volume up to 5 μL:
    a. Diluted Active ZAP70: 3 μL
    b. Substrate/ATP (mix as prepared in Step 2). This initiates the reaction: 2 μL
  4. Set up the blank control as outlined in Step 2, excluding the addition of the kinase. Replace the kinase with an equal volume of Kinase Dilution Buffer X.
  5. Incubate at ambient temperature for 40 minutes.
  6. After the 40 minute incubation period, terminate the reaction and deplete the remaining ATP by adding 5 μL of ADP-Glo™ Reagent. Spin down and shake the 384-well plate. Then incubate the reaction mixture for another 40 minutes at ambient temperature.
  7. Then add 10 μL of the Kinase Detection Reagent to the 384-well plate and incubate the reaction mixture for another 30 minutes at ambient temperature.
  8. Read the 384-well reaction plate using the Luminescence Module Protocol on a GloMax®-Multi Microplate Multimode Reader.
  9. Determine the corrected activity (RLU) by removing the blank control value (see step 4) for each sample and calculate the kinase specific activity as outlined below.


    Calculation of Specific Activity of ADP (RLU/pmol)
    From ADP standard curve, determine RLU/pmol of ADP

    Kinase Specific Activity (SA) (pmol/minutes/μg or nmol/minutes/mg)
    Corrected RLU from reaction / [(SA of ADP in RLU/pmol) x (Reaction time in minutes) x (Enzyme amount in μg or mg)]

Notes

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

Alternate Names for Recombinant Human Active ZAP70 Protein, CF

  • 70 kDa zeta-associated protein
  • EC 2.7.10
  • EC 2.7.10.2
  • mrtle
  • mur
  • SRK
  • SRKFLJ17679
  • STD
  • STDFLJ17670
  • Syk-related tyrosine kinase
  • tyrosine-protein kinase ZAP-70
  • TZK
  • ZAP70
  • ZAP-70
  • zeta-chain (TCR) associated protein kinase (70 kD)
  • zeta-chain (TCR) associated protein kinase 70kDa
  • zeta-chain associated protein kinase, 70kD

Background

ZAP70 is a non-receptor protein tyrosine kinase (part of the Syk/ZAP70 family) that is involved in signaling by the T-cell antigen receptor (TCR). Ligation of the TCR/CD3 receptor in Jurkat T-cells induces phosphoprotein complexes that contain ZAP70 (1). TCR zeta chains are initially phosphorylated by p56Lck that lead to the recruitment of ZAP70 via its SH2 domain. ZAP70 in turn phosphorylates other proteins in the TCR-phosphoprotein complex. One of the natural substrates for ZAP70 is the zeta-chain dimer of the TCR/CD3 complex (2).

  1. Duplay, P. et al. (1994) J. Exp. Med. 179:1163.
  2. Chan, A.C. et al. (1994) J. Immunol. 152:4758.

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Bioinformatics

Gene Symbol ZAP70
Uniprot