Plant Membrane Yeast Two-Hybrid Screening Service
Membrane Protein Interaction Screening
CD BioSciences provides Plant Membrane Yeast Two-Hybrid screening services for studying interactions involving membrane-associated or transmembrane plant proteins.
Membrane Y2H is considered when conventional nuclear Y2H is unsuitable because the bait protein contains transmembrane regions, membrane localization signals, or topology constraints that may prevent proper nuclear reporter-based screening.
Why Membrane Y2H Is Different
Conventional Y2H depends on reporter activation in the yeast nucleus. Membrane proteins often do not fold, localize, or function properly in that context. Membrane yeast two-hybrid systems commonly use split-ubiquitin logic, where interaction between membrane-associated bait and prey brings ubiquitin fragments together and releases a transcription factor for reporter activation.
Figure 1. Split-ubiquitin principle for membrane yeast two-hybrid screening.
Suitable Projects
Bait proteins with one or more predicted transmembrane helices.
Plant receptor-like kinases, transporters, channels, and related membrane-associated proteins.
Proteins where orientation and membrane context may influence interaction recovery.
Defined membrane-associated protein pairs can be evaluated by point-to-point membrane Y2H design.
Service Workflow
Figure 2. General workflow for plant membrane Y2H screening.
- Review bait protein sequence, topology, and predicted domains
- Select membrane Y2H vector orientation and construct design
- Assess bait expression, toxicity, and background reporter activity
- Prepare or select suitable prey library
- Perform screening under optimized selection conditions
- Confirm positive colonies by PCR and sequencing
- Analyze candidate interactors and prepare report
Controls and Limitations
| Consideration | Impact |
|---|---|
| Protein topology | Incorrect fusion orientation may prevent reporter release or interaction detection. |
| Bait toxicity | Membrane bait expression may impair yeast growth and reduce screenable colonies. |
| Background activation | Reporter background should be checked before library-scale screening. |
| False negatives | Plant-specific membrane environment, modifications, or cofactors may not be reproduced in yeast. |
Sample and Information Requirements
- Bait gene or protein sequence
- Predicted transmembrane regions and signal peptides, if available
- Plant species and tissue source for prey library
- Known localization or topology information
- Existing plasmids or codon-optimized sequences, if available
- Number of bait proteins and desired validation plan
Deliverables
- Construct design and bait assessment record
- Screening images and experimental records
- Positive clone PCR and sequencing data
- Candidate interactor list and annotation summary
- Standard project report and original data files
Related Services
Please contact us with your bait protein sequence, predicted membrane topology, and screening objective for project evaluation.
For research use only, not for clinical use.