Study of a Mutant Sup35 Protein in Yeast
Author Information
Author(s): Fabret Céline, Cosnier Bruno, Lekomtsev Sergey, Gillet Sylvie, Hatin Isabelle, Le Maréchal Pierre, Rousset Jean Pierre
Primary Institution: IGM, Univ Paris-Sud, UMR 8621, Orsay, France
Hypothesis
Is threonine 341 of the Sup35 protein phosphorylated in yeast and does it affect the protein's termination activity?
Conclusion
The study identifies threonine 341 as a critical residue for the translation termination activity of Sup35 in yeast.
Supporting Evidence
- Threonine 341 is conserved across various species, indicating its importance.
- Mutants of Sup35p showed decreased GTPase activity and increased translational readthrough.
- Phosphorylation of Sup35p was confirmed in vitro but not in vivo.
- Mutant forms of Sup35p were able to support cell viability despite low GTPase activity.
Takeaway
Researchers looked at a part of a protein in yeast that helps stop making proteins. They found that changing one tiny piece of it can change how well it works.
Methodology
The study involved creating mutants of the Sup35 protein and testing their phosphorylation and GTPase activity in vitro and in vivo.
Limitations
No phosphorylation of Sup35 was detected in vivo under the conditions tested.
Statistical Information
P-Value
0.00333
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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