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Exploring the yeast acetylome using functional genomics.

Supipi Kaluarachchi Duffy1, Helena Friesen, Anastasia Baryshnikova

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Summary
This summary is machine-generated.

This study reveals new roles for lysine acetylation beyond histones in yeast. Functional genomics identified key pathways regulated by lysine deacetylases (KDACs), uncovering acetylation

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genomics

Background:

  • Lysine acetylation is a key posttranslational modification primarily known for regulating histones.
  • Its broader roles in cellular functions are not well understood.
  • Exploring the yeast acetylome can illuminate these unknown functions.

Purpose of the Study:

  • To investigate the broader impact of lysine acetylation on cellular functions in yeast.
  • To identify pathways regulated by lysine deacetylases (KDACs) using functional genomics.
  • To characterize novel acetylation targets and their roles in cellular processes.

Main Methods:

  • Utilized a functional genomics approach in budding yeast, specifically assessing gene overexpression in the absence of KDACs.
  • Generated a synthetic dosage lethal (SDL) interaction network involving class I and II KDACs.
  • Performed a biochemical survey to identify proteins acetylated in vivo by the KDAC RPD3.

Main Results:

  • Identified a network of 463 synthetic dosage lethal (SDL) interactions linked to KDACs, revealing diverse cellular pathways.
  • Discovered 72 proteins acetylated in vivo through a survey of genes interacting with RPD3.
  • Detailed analysis of Swi4 showed acetylation regulates its interaction with Swi6, impacting G1-specific gene expression via the SBF transcription factor.

Conclusions:

  • This study significantly expands the known yeast acetylome and highlights the utility of functional genomic screens for enzyme pathway exploration.
  • Acetylation plays a crucial role in regulating transcription factors like SBF, influencing cell cycle progression.
  • Provides a foundation of functional data for future research into acetylation's role in cellular regulation.