Pierce™ GST Protein Interaction Pull-Down Kit
Pierce™ GST Protein Interaction Pull-Down Kit
Thermo Scientific™

Pierce™ GST Protein Interaction Pull-Down Kit

Easily capture and affinity purify binding partners of GST-tagged fusion proteins with these glutathione (GSH) agarose beads and complete reagent set.
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Catalog NumberQuantity
2151625 reactions kit
Catalog number 21516
Price (USD)
521.65
Online Exclusive
572.00
Save 50.35 (9%)
Each
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Quantity:
25 reactions kit
Request bulk or custom format
Price (USD)
521.65
Online Exclusive
572.00
Save 50.35 (9%)
Each
Add to cart

Thermo Fisher Scientific Pierce GST Tag Protein Interaction Pull-Down Kits contains the necessary components to capture and purify proteins that interact with GST-tagged fusion proteins.

Features of GST Tag Protein Interaction Pull-Down Kit:

  • GST pull-down (Product No. 21516)—gently purifies protein interactors of any GST-tagged fusion protein without denaturing
  • Complete kits—provide all components and detailed protocol for purifying protein:protein interactions
  • No special equipment needed—use common laboratory equipment and reagents (e.g., microcentrifuge)
  • Convenient—microcentrifuge spin columns facilitate simple and efficient manipulation of agarose beads, including simple processing of multiple samples
  • Flexible—instructions include protocols for use with bait and prey proteins from many different sources
  • Binding—Binds approx. 8 mg of GST-tagged fusion protein per mL of resin

Applications:

  • Discover a new protein:protein interaction from a cell lysate
  • Confirm a putative interaction from a cell lysate or with a previously purified protein
  • Extract protein:protein interaction information from in vitro transcription/translation lysates

You provide the tagged fusion protein as the 'bait' and the cells expressing the putative protein interaction target ('prey'), and the Pull-Down Kits provide everything else: cell lysis buffer, microcentrifuge spin columns, tag-specific affinity resin (agarose beads) and optimized buffers and protocol. The Pull-Down Kits are designed to teach the method to first-time users and to increase ease-of-use, convenience and reproducibility for experienced researchers.

Related Products

Pierce™ His Protein Interaction Pull-Down Kit (Catalog #21277)

For Research Use Only. Not for use in diagnostic procedures.

Pull-down is a small-scale affinity purification technique similar to immunoprecipitation (IP), except that the antibody function of is replaced by some other affinity system. In this case, the affinity system is a GST-tagged protein that can be captured by glutathione agarose beads. The fusion-tagged protein acts as the bait to capture a putative binding partner (i.e., the prey). In a typical pull-down assay, the immobilized bait protein is incubated with a cell lysate. After the prescribed washing steps, the interactors are selectively eluted for analysis in-gel or by Western blot.

Specifications
AssayAffinity Purification
Bed Volume750 μL
For Use With (Application)Pull-Down (Tag-Based)
For Use With (Equipment)Microcentrifuge
FormatKit
FormulationSlurry: 50 %
Quantity25 reactions kit
Sufficient For25 Reactions
TargetNot Target-Specific
Capacity (Metric)1.5 mL
Product LinePierce™
TypePull-Down Kit
Unit SizeEach
Contents & Storage
Sufficient For: At least 25 pull-down reactions, each using 25 μL of resin
• Glutathione Agarose, 750 μL
• Pull-Down Lysis Buffer, 250 mL
• Glutathione, 1 g
• TBS Pack (makes 500 mL), 1 pack
• Pierce Spin Columns and Accessories, 27 columns
• Microcentrifuge Collection Tubes, 100 tubes

Upon receipt store Pierce Lysis Buffer at room temperature. Store remaining kit components at 4°C.

Frequently asked questions (FAQs)

If my protein is endogenously expressed, which Thermo Scientific Protein:Protein Interaction (PPI) kit should I choose?

We recommend the biotin kit for endogenously expressed proteins. The reason for this is the wide variety of biotinylation reagents that can be used to label the detection protein of the binding pair. For help choosing a biotinylation reagent, refer to the Biotinylation Selection Guide available at our website.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

How is the tagged protein detected on the membrane using the Thermo Scientific Protein:Protein Interaction (PPI) kits?

The biotin kit utilizes streptavidin-HRP to detect the biotinylated protein bound to the prey protein on the membrane. The GST kit utilizes a polyclonal goat anti-GST antibody for detection of the glutathione-S-transferase tagged fusion protein bound to another protein on a membrane.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

How many reactions can be performed using one Thermo Scientific Protein:Protein Interaction (PPI) kit?

The Thermo Scientific Pull-Down Protein:Protein Interaction Kits contain a complete, validated set of reagents specifically developed for performing pull-down assays.The kits contain sufficient materials for conducting 25 pull-down assays.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

Are all of the conditions for binding the prey protein to the bait protein described in the Thermo Scientific Protein:Protein Interaction (PPI) kits?

No. Every protein pair will require unique conditions in order to bind with one another. Factors to consider are pH, ionic strength of the buffer, need for cofactors, whether the interaction is long term or transient, etc. The researcher is recommended to perform a literature search or try several different conditions in order to determine what conditions are best for the binding of their proteins of interest. The kit includes a “universal“ wash buffer formed by diluting the lysis buffer 1:1 in TBS.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.

With the Thermo Scientific Protein:Protein Interaction (PPI) kits, what methods can be used to detect the prey protein?

The prey protein can be detected following transfer on a membrane. The membrane procedures uses 1:100,000 - 1:500,000 dilution of the anti-GST antibody.

Find additional tips, troubleshooting help, and resources within our Protein Assays and Analysis Support Center.