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Inducible protein-protein interactions—iDimerize systems

All essential processes of the cell are regulated by a complex network of protein-protein interactions. iDimerize technology allows you to induce the interaction between two proteins, or the re-localization of a protein, and thereby control any cellular process that is activated (or inactivated) by these events.

  • Induce your protein to interact with another protein
  • Direct the cellular localization of your protein
  • Induction is extremely fast and specific
Signal transduction Protein relocalization Enzyme activation Protein splicing
Inducible apoptosis Protein secretion RNA splicing Cell adhesion & rolling
Inducible transcription Membrane lipid content DNA looping Glycosylation
Ion channel gating Membrane dynamics  
Over 400 published applications using iDimerize technology

How does iDimerize technology work?

To create an inducible system for protein-protein interactions, tag your protein(s) of interest with a dimerization domain (Dmr A, B, or C). Proteins fused to a Dmr domain can then be induced to interact by adding a small molecule ligand to the culture media (Figure 1). The dimerizer ligands are designed to bind two Dmr domains with high affinity and specificity. When two Dmr-fused proteins happen to interact, the presence of dimerizer ligand traps and stabilizes the bound complex. Dmr domains and ligands vary depending on the iDimerize system used.

iDimerize inducible protein-protein interactions

Figure 1. Inducing protein-protein interactions using the Inducible Homodimerization System.

iDimerize systems and ligands

Our toolbox of Dmr domains and ligands allow inducible homodimerization, heterodimerization, reversible dimerization, and transcriptional activation. The possibilities are endless, so with some imagination you can design an inducible dimerization system for your in vitro or in vivo application.

Components and applications of available iDimerize systems


Induce self-association of two copies of the same protein

Inducible homodimerization systemiDimerize inducible protein-protein interactions_ Homodimerization

Control a wide variety of cellular processes, including proliferation, differentiation, adhesion, transformation, and apoptosis.

  


Induce association of two different proteins

Inducible heterodimerization systemiDimerize inducible protein-protein interactions_ Heterodimerization

Control cellular localization, conditional alleles of receptors, signaling molecules, and other proteins involved in a signaling pathway.


   


Induce dissociation (solubilization or deaggregation) of proteinsiDimerize inducible protein-protein interactions_ Reverse Dimerization

Inducible reverse dimerization system

Control the secretion and/or cellular location of proteins.



Induce transcription of a gene of interestiDimerize inducible protein-protein interactions_ Gene Expression

Regulated transcription system

The heterodimerization system motifs, fused to a transcription activation domain (TA) and a DNA binding domain (DB), respectively.

  

  


 

Technology is fast and highly specific

iDimerize technology can induce protein-protein interactions at speeds relevant to biological processes. In one recent study, heterodimerization was observed within 30 seconds of adding the small molecule dimerizer. Since the induced interactions are limited to Dmr-fused protein(s), your experimental phenotype will not be compromised by off-target effects. This level of control has made iDimerize systems the ideal choice for dissecting cell signaling pathways, where native ligands may activate multiple pathways.

Direct your protein anywhere in the cell

The iDimerize Inducible Heterodimerization System has also been widely used to direct proteins to different locations within the cell (Fig. 2). Here, a DmrC domain is anchored at the desired subcellular location using the appropriate signal sequence. When the dimerizer ligand is added to media, any protein fused to a DmrA domain will localize to that location.

iDimerize inducible protein-protein interactions_ protein relocalization

Figure 2. Inducing protein accumulation at the plasma membrane using the iDimerize Inducible Heterodimerization System.

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