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Human ELK-1 Transcription Factor Activity Assay

RayBio® Human ELK-1 Transcription Factor Activity Assay. This assay uses a dsDNA coated plate with canonical ELK-1 binding sequences to semi-quantitatively detect active ELK-1 in lysates or nuclear extracts. Dry ice shipment (additional fee).

$1,608.00  
TFEH-ELK1-5
+

Antigen Information

Accession Number:
  • P19419
Gene ID:
  • 2002
Gene Symbols:
  • ELK1
Protein Name & Synonyms:
ETS domain-containing protein Elk-1
Target Species:
  • Human

Assay Format

Pathway:
  • IGF Signaling
  • MAPK Signaling
  • PI3K-AKT Signaling
Specificity:
The olionucleotide/antibody pair provided in this kit recognizes human ELK-1 in whole lysates and nuclear extracts.
Number of Targets Detected:
1
Species Detected:
  • Human
Compatible Sample Types:
  • Cell Lysates
  • Nuclear Extracts
Design Principle:
  • Sandwich-based
Method of Detection:
Colorimetric
Quantitative/Semi-Quantitative:
  • Semi-Quantitative
Solid Support:
96-well Microplate

Product Specifications

Size:
1, 2, or 5 x 96-Well Strip Microplate Kit

Introduction

MAP kinase (MAPK) pathways including ERK1/2, p38 and JNK are activated upon environmental stimulus by growth factors or cellular stress, such as UV irradiation. This signaling serves to transmit external stimuli to the nucleus and activate numerous transcription factors. This results in changes in gene expression required for cellular growth, differentiation and survival. One downstream effector of these signaling pathways is Elk-1, a transcription factor that regulates immediate early gene (IEG) expression via the serum response element (SRE) DNA consensus site. Elk-1 belongs to the ternary complex factor (TCF) subfamily, part of Ets (E twenty-six) oncogene family of transcription factors which contain a highly conserved DNA-binding domain (DBD, the Ets domain) comprised of 85 amino acids. The TCF subfamily consists of three members ELK-1, SAP-1 and SAP-2/Net which are distinct gene products with different chromosomal localizations in both the mouse and human genomes. Each of the TCFs contains three conserved domains including the N-terminal Ets DNA binding domain, B-box region engaged in the interaction with serum response factor (SRF) to form ternary complex, and C-terminal transcriptional activation domain. Elk-1 can be activated by either pathway of ERK, JNK, or p38 through phosphorylation and de-SUMOylation. SUMO modification of Elk-1 by ERK pathway represses its transcriptional activity via SUMO dependent recruitment of histone deacetylases. Phosphorylated and de-sumoylated ELK-1 translocates to the nucleus from the cytoplasm and binds to SRE DNA sequences containing a central GGAA/T motif to initiate expressions of involved genes.

Product Features

  • Specific transcription factor-DNA binding assay
  • Perfect alternative to EMSA
  • Easy to perform in an ELISA format
  • Non-radioactive assay
  • High throughput (96-well plate format)
  • Assay can be completed within 5 hours

Application Notes

Kit Components
  • 96-well Strip Microplate pre-coated with DNA probes
  • DNA Binding Buffer
  • Positive Control Sample
  • Specific Competitor DNA probe
  • Non-specific Competitor DNA probe
  • Assay Reagent
  • DTT
  • Wash Buffer
  • Primary Antibody
  • HRP-conjugated Secondary Antibody
  • Antibody Diluent Buffer
  • TMB One-Step Substrate Reagent
  • Stop Solution
Other Materials Required
  • Distilled or deionized water
  • 100 ml and 1 liter graduated cylinders
  • Tubes to prepare sample dilutions
  • Absorbent paper
  • Precision pipettes to deliver 2 µl to 1 ml volumes
  • Adjustable 1-25 ml pipettes for reagent preparation
  • Microplate reader capable of measuring absorbance at 450 nm
Protocol Outline
  1. Prepare all reagents and samples as instructed in the manual.
  2. Add 100 µl of sample or positive control to each well.
  3. Incubate 2 h at RT or O/N at 4 °C.
  4. Add 100 µl of prepared primary antibody to each well.
  5. Incubate 1 h at RT.
  6. Add 100 µl of prepared HRP-secondary antibody to each well.
  7. Incubate 1 h at RT.
  8. Add 100 µl of TMB One-Step Substrate Reagent to each well.
  9. Incubate 30 min at RT.
  10. Add 50 µl of Stop Solution to each well.
  11. Read at 450 nm immediately.

Typical Data

Figure 1
Transcription factor assay of ELK-1 from nuclear extracts of HeLa cells or HeLa cells treated with PMA for 3 hr. After stimulation activated ELK-1 binds with its corresponding DNA with the RayBio® TF Activity Assay Kit.

Transcription factor assay of ELK-1 from nuclear extracts of HeLa cells or HeLa cells treated with PMA for 3 hr. After stimulation activated ELK-1 binds with its corresponding DNA with the RayBio TF Activity Assay Kit.

Figure 2
Transcription factor assay of ELK-1 from nuclear extracts of HeLa cells or HeLa cells treated with PMA for 3 hr with the specific competitor or non-specific competitor. The result shows specific binding of ELK-1 to the ARE binding site detected by using the RayBio® TF Activity Assay Kit.

Transcription factor assay of ELK-1 from nuclear extracts of HeLa cells or HeLa cells treated with PMA for 3 hr with the specific competitor or non-specific competitor. The result shows specific binding of ELK-1 to the ARE binding site detected by using the RayBio<sup>®</sup> TF Activity Assay Kit.

Storage/Stability

Upon receipt, the positive control should be removed and stored at -20° or -80°C. The remainder of the kit can be stored for up to 6 months at 2-8°C from the date of shipment. Opened Microplate Wells or reagents may be stored for up to 1 month at 2° to 8°C. Return unused wells to the pouch containing desiccant pack, reseal along entire edge.
Note: The kit can be used within one year if the whole kit is stored at -20°C upon receipt. Avoid repeated freeze-thaw cycles.

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Usage

This product is furnished for LABORATORY RESEARCH USE ONLY.
Not for diagnostic or therapeutic use.

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