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Microscopy of Fission Yeast Sexual Lifecycle
Published on: March 9, 2016
Fission yeast SWI/SNF and RSC complexes show compositional and functional differences from budding yeast
Brendon J Monahan1, Judit Villén, Samuel Marguerat
1Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature Structural & Molecular Biology
|July 16, 2008
Summary
We studied SWI/SNF and RSC chromatin-remodeling complexes in the fission yeast Schizosaccharomyces pombe. These complexes have essential roles in gene transcription, with SWI/SNF repressing iron-transport genes.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- SWI/SNF chromatin-remodeling complexes are vital for gene transcription.
- Studies in Saccharomyces cerevisiae have elucidated SWI/SNF and RSC functions.
- Understanding these complexes in other organisms provides evolutionary insights.
Purpose of the Study:
- To characterize the in vivo functions of SWI/SNF and RSC in Schizosaccharomyces pombe.
- To compare S. pombe SWI/SNF and RSC to their S. cerevisiae counterparts.
- To investigate the evolutionary conservation and divergence of these complexes.
Main Methods:
- Comparative analysis of SWI/SNF and RSC complex compositions in S. pombe and S. cerevisiae.
- Phenotypic analysis of S. pombe mutants lacking SWI/SNF or RSC components.
- Microarray analysis to assess genome-wide transcriptional changes.
Main Results:
- S. pombe SWI/SNF and RSC complexes exhibit distinct compositions compared to S. cerevisiae, with some similarities to metazoan complexes.
- Certain conserved proteins, including actin-like proteins, show differential requirements for viability between the two yeast species.
- SWI/SNF and RSC are broadly required for transcription, and SWI/SNF directly represses iron-transport genes.
Conclusions:
- SWI/SNF and RSC complexes in S. pombe possess unique features compared to S. cerevisiae, reflecting evolutionary divergence.
- The study highlights the essential roles of these chromatin remodelers in yeast gene regulation.
- SWI/SNF's direct repression of iron-transport genes is a key finding with potential implications for iron homeostasis.
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