Ixr1 Is Required for the Expression of the Ribonucleotide Reductase Rnr1 and Maintenance of dNTP Pools
2011
Role of Ixr1 in DNA Building Block Regulation
publication
Evidence: high
Author Information
Author(s): Tsaponina Olga, Barsoum Emad, Åström Stefan U., Chabes Andrei
Primary Institution: Umeå University
Hypothesis
Ixr1 is required for the expression of the Ribonucleotide Reductase Rnr1 and maintenance of dNTP pools.
Conclusion
The study shows that Ixr1 is essential for maintaining dNTP levels and proper expression of Rnr1, especially after DNA damage.
Supporting Evidence
- Deletion of IXR1 leads to decreased dNTP levels.
- Ixr1 is required for normal expression of Rnr1.
- The synthetic lethality of dun1 and ixr1 is due to inadequate RNR activity.
Takeaway
Ixr1 helps cells make the building blocks of DNA, and without it, cells can't make enough of these blocks, especially when they are damaged.
Methodology
The study involved genetic interaction screens, Western blot analysis, and chromatin immunoprecipitation to assess protein levels and interactions.
Digital Object Identifier (DOI)
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