Plant Transcription Factor-DNA Binding EMSA Service
Plant Transcription Factor-DNA Interaction Validation
CD BioSciences provides Plant Transcription Factor-DNA Binding EMSA services for validating whether a plant transcription factor, nuclear protein extract, or purified protein binds to a defined DNA sequence. The service is commonly used for promoter element analysis, cis-regulatory motif validation, and mechanistic studies of plant gene regulation.
This page focuses on DNA EMSA projects involving candidate promoter regions, predicted transcription factor binding sites, wild-type and mutant probes, and optional competition or super-shift designs.
Service Overview
Plant transcription factor-DNA EMSA is used to detect the formation of a complex between a DNA probe and a protein sample under non-denaturing conditions. A shifted band in native PAGE indicates that a protein-DNA complex has formed. Because nuclear extracts and recombinant proteins may also produce non-specific binding, interpretation should include appropriate free probe, competition, mutant probe, and antibody-related controls when applicable.
Figure 1. Plant transcription factor binding to a promoter probe and the corresponding shifted band in native PAGE.
When to Use This Service
Test whether a transcription factor binds to a promoter fragment, cis-element, or predicted motif.
Compare wild-type and mutant probes to determine whether binding depends on the candidate motif.
Compare binding activity in nuclear extracts from different tissues, treatments, developmental stages, or stress conditions.
Provide biochemical evidence for transcriptional regulation models in plant development, stress response, or hormone signaling studies.
Experimental Design
The experimental design depends on the protein source and the available sequence information. For purified transcription factors or recombinant proteins, the assay can focus on direct binding to a defined probe. For plant nuclear extracts, lane controls and competitor probes are particularly important because multiple DNA-binding proteins may be present in the sample.
| Design Element | Typical Consideration |
|---|---|
| DNA probe | Promoter fragment, cis-element, predicted binding motif, or short sequence surrounding the target site. |
| Protein sample | Purified transcription factor, recombinant protein, nuclear extract, or other protein preparation. |
| Specificity controls | Excess unlabeled wild-type competitor, mutant competitor, or non-specific competitor. |
| Protein confirmation | Super-shift EMSA may be considered when a compatible target-specific antibody is available. |
Workflow
Figure 2. Workflow for plant transcription factor-DNA EMSA, from input review to result interpretation.
- Review of target transcription factor and plant species
- Evaluation of promoter region or candidate motif
- Wild-type and mutant probe design
- Protein sample preparation or quality assessment
- Binding reaction and native PAGE
- Imaging, data organization, and interpretation
Sample and Information Requirements
- Target transcription factor name and species
- Promoter sequence, candidate DNA motif, or published binding site
- Protein source, such as purified protein, recombinant protein, or nuclear extract
- Plant tissue or cell sample information if protein extraction is required
- Antibody information if super-shift EMSA is planned
- Number of samples, treatments, or experimental groups
If the binding site has not been finalized, related promoter sequence, motif prediction results, or literature information can be used for probe design planning.
Deliverables
- Probe design and synthesis information
- Labeled and unlabeled probe information, if applicable
- Experimental lane design and assay record
- Original gel images
- Result interpretation and standard report
Related Services
Please contact us with your target transcription factor, promoter sequence, available protein sample, and expected validation goal for project evaluation.
For research use only, not for clinical use.