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Recombinant Human Active ASK1 (aa 649-946) Protein, CF

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The approximate molecular weight is 60 kDa and the average purity is 90%.

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Summary
Reactivity HuSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

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Recombinant Human Active ASK1 (aa 649-946) Protein, CF Summary

Details of Functionality
The specific activity of ASK1 is typically 82-112 nmol/min/mg using a myelin basic protein (MBP) substrate.
Source
Spodoptera frugiperda, Sf 9 (baculovirus)-derived human ASK1 protein
aa 649-946
Accession #
N-terminal Sequence
Using an N-terminal GST tag
Protein/Peptide Type
Recombinant Proteins
Gene
MAP3K5
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane.

Applications/Dilutions

Dilutions
  • Bioactivity
SDS-PAGE
60 kDa
Publications
Read Publication using
3575-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, 0.25 mM DTT, 10 mM glutathione, 0.1 mM EDTA, 0.1 mM PMSF, 25% glycerol.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain at 5 μg per lane.
Assay Procedure
  • Active Kinase - Active ASK1 (0.1 μg/μL) diluted with Kinase Dilution Buffer and assayed as outlined in Figure 2. Note: These are suggested working dilutions. Optimal dilutions should be determined by each laboratory for each application.
  • Kinase Assay Buffer I, pH 7.2 - 25 mM MOPS, 12.5 mM beta -glycerolphosphate, 25 mM MgCl2, 5 mM EGTA, 2 mM EDTA. Add 0.25 mM DTT to the Kinase Assay Buffer prior to use.
  • Kinase Dilution Buffer, pH 7.2 - Kinase Assay Buffer I diluted at a 1:4 ratio (5-fold dilution) with 50 ng/μL BSA solution.
  • 10 mM ATP Stock Solution - Prepare the ATP Stock Solution by dissolving 55 mg of ATP in 10 mL of Kinase Assay Buffer I.
  • [33P]-ATP Assay Cocktail - Prepare 250 μM [33P]-ATP Assay Cocktail in a designated radioactive work area by combining 150 μL of 10 mM ATP Stock Solution, 100 μL of [33P]-ATP (1 mCi/100 μL), and 5.75 mL of Kinase Assay Buffer I.
  • Substrate - Myelin basic protein (MBP) diluted in distilled or deionized water to a final concentration of 1 mg/mL.
  1. Thaw the [33P]-ATP Assay Cocktail in a shielded container in a designated radioactive work area.
  2. Thaw the Active ASK1, Kinase Assay Buffer I, Substrate, and Kinase Dilution Buffer on ice.
  3. In a pre-cooled microfuge tube, add the following reaction components bringing the initial reaction volume up to 20 μL.
    a. Diluted Active ASK1: 10 μL
    b. Substrate (1 mg/mL Stock Solution): 5 μL
    c. Distilled water (2-8 °C): 5 μL
  4. Set up the blank control as outlined in step 3, excluding the addition of the substrate. Replace the substrate with an equal volume of distilled or deionized water.
  5. Initiate the reaction by the addition of 5 μL [33P]-ATP Assay Cocktail, bringing the final volume up to 25 μL. Incubate the mixture in a water bath at 30 °C for 15 minutes.
  6. After the 15 minute incubation period, terminate the reaction by spotting 20 μL of the reaction mixture onto individual pre-cut strips of phosphocellulose P81 paper.
  7. Air dry the pre-cut P81 strip and sequentially wash in a 1% phosphoric acid solution (dilute 10 mL of phosphoric acid and make a 1 liter solution with distilled or deionized water) with constant gentle stirring. It is recommended that the strips be washed a total of three times for approximately 10 minutes each.
  8. Count the radioactivity on the P81 paper in the presence of scintillation fluid in a scintillation counter.
  9. Determine the corrected cpm by removing the blank control value (see step 4) for each sample and calculate the kinase specific activity as outlined below:


    Calculation of [33P]-ATP Specific Activity (SA) (cpm/pmol)
    Specific Activity (SA) = cpm for 5 μL [33P]-ATP/pmole of ATP (in 5 μL of a 250 μM ATP stock solution; i.e. 1250 pmol)

    Calculation of Kinase Specific Activity (SA) (pmol/minutes/μg or nmol/minutes/mg)
    Corrected cpm from reaction / [(SA of 33P-ATP in cpm/pmol) x (Reaction time in minutes) x (Enzyme amount in μg or mg)] x [(Reaction volume) / (Spot Volume)]

Notes

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

Alternate Names for Recombinant Human Active ASK1 (aa 649-946) Protein, CF

  • Apoptosis signal-regulating kinase 1
  • ASK1
  • ASK-1
  • ASK1MEKK 5
  • EC 2.7.11
  • MAP/ERK kinase kinase 5
  • MAP3K5
  • MAPK/ERK kinase kinase 5
  • MAPKKK5EC 2.7.11.25
  • MEK kinase 5
  • MEKK5
  • MEKK5apoptosis signal regulating kinase 1
  • mitogen-activated protein kinase kinase kinase 5

Background

ASK1, also known as MEKK5 or MAPKKK5, activates MKK3, MKK4 (SEK1), and MKK6. Over-expression of ASK1 induces apoptotic cell death and is activated in cells treated with tumor necrosis factor alpha (TNF ) (1). ASK1 interacts with members of the TRAF family and is activated by TRAF2 in the TNF-signaling pathway. After activation by TRAF2, ASK1 activates MKK4, which in turn activates JNK. Thus, ASK1 is a mediator of TRAF2-induced JNK activation (2).
  1. Ichijo, H. et al. (1997) Science 275:90.
  2. Nishitoh, H. et al. (1998) Mol. Cell 2:389.

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Publications for ASK1 (3575-KS)(1)

We have publications tested in 1 confirmed species: Human.

We have publications tested in 1 application: Bioassay.


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Bioinformatics

Gene Symbol MAP3K5
Uniprot