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Genetic and biochemical interactions between SCP160 and EAP1 in yeast
Bryce A Mendelsohn1, Ai-Min Li, Claudia A Vargas
1Department of Biology, Emory College, Emory University School of Medicine, Room 325.2 Whitehead Building, 615 Michael Street, Atlanta, GA 30322, USA.
Nucleic Acids Research
|October 8, 2003
Summary
The study reveals a significant interaction between yeast RNA-binding protein Scp160p and translation factor Eap1p, uncovering new roles for Scp160p in translation and providing tools to study these essential genes.
Area of Science:
- Molecular Biology
- Yeast Genetics
- Protein Interactions
Background:
- Scp160p is a yeast RNA-binding protein associated with polyribosomes, but its function is unknown.
- Eap1p is a known translation factor and eIF4E-binding protein with uncharacterized spindle pole body roles.
Purpose of the Study:
- To elucidate the biological role of Scp160p using a genetic screen.
- To investigate the functional relationship between Scp160p and Eap1p.
Main Methods:
- Ethyl methanesulfonate (EMS) screen for synthetic lethality with scp160 loss.
- Construction of a double-null yeast strain (scp160/eap1).
- Quantitative in vivo functional assay, RNA-binding assays, and co-immunoprecipitation.
Main Results:
- Identified EAP1 as synthetically lethal with scp160 loss.
- Demonstrated that Eap1p's inability to bind eIF4E impairs its SCP160-related function.
- Showed RNA-dependent association between Eap1p and Scp160p complexes.
- Found that loss of either gene affects the other's complex association or localization.
Conclusions:
- Scp160p plays a role in translation.
- The interaction between SCP160 and EAP1 is biologically significant.
- Developed essential tools for future research on Scp160p and Eap1p in vivo functions.