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High-Throughput Identification of Nuclear Envelope Protein Interactions in Schizosaccharomyces pombe Using an Arrayed
Joseph M Varberg1, Jennifer M Gardner1, Scott McCroskey1
1Stowers Institute for Medical Research, Kansas City, Missouri.
G3 (Bethesda, Md.)
|October 28, 2020
Summary
Researchers created a fission yeast membrane protein library to study nuclear envelope (NE) protein interactions. This method helps understand the function of NE transmembrane proteins and their roles in nuclear organization.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- The nuclear envelope (NE) is crucial for maintaining nuclear structure, chromatin organization, and gene expression.
- Integral and peripheral membrane proteins at the NE are key to its function, but their interactions are not fully understood.
- Understanding these protein interactions is vital for characterizing NE protein function.
Purpose of the Study:
- To develop a high-throughput screening method for characterizing NE transmembrane protein interactions.
- To investigate the interaction networks of conserved inner nuclear membrane proteins in *Schizosaccharomyces pombe*.
- To analyze alterations in protein interaction networks in temperature-sensitive mutants.
Main Methods:
- Developed an arrayed library of integral and peripheral membrane proteins from *Schizosaccharomyces pombe*.
- Employed the split-ubiquitin based membrane yeast two-hybrid system for high-throughput screening.
- Characterized protein interactions for Cut11/Ndc1, Lem2, and Ima1/Samp1/Net5.
- Assessed changes in Cut11's interaction network in *cut11-ts* mutants.
Main Results:
- Successfully created a library of fission yeast membrane proteins for interaction studies.
- Identified novel interactions for inner nuclear membrane proteins Cut11, Lem2, and Ima1.
- Revealed alterations in the Cut11 interaction network in temperature-sensitive mutants.
- Demonstrated the utility of the membrane yeast two-hybrid system for NE protein interactome analysis.
Conclusions:
- The developed library and screening approach effectively characterize NE transmembrane protein interactions.
- This method provides insights into the functional roles of NE proteins by elucidating their interaction partners.
- The approach is adaptable for studying integral membrane proteins in various cellular compartments.
