Evaluating Protein Extraction Techniques for Elucidating Proteomic Changes in Yeast Deletion Strains.

Area of Science:

• Proteomics
• Yeast genetics
• Cellular biology

Background:

• Protein abundance alterations in yeast deletion strains offer insights into conserved cellular functions.
• Understanding these alterations aids in deciphering complex regulatory networks.

Purpose of the Study:

• To investigate the impact of protein extraction methodologies on whole proteome analysis in *Saccharomyces cerevisiae* (yeast).
• To compare detergent-based lysis versus mechanical lysis with silica beads for proteomic profiling.
• To evaluate proteomic profiles in wild-type and SUMO E3 ligase deletion strains (*siz1*Δ and *nfi1*Δ).

Main Methods:

• Utilized isobaric TMTpro-labeling combined with mass spectrometry (real-time search MS3).
• Analyzed proteomic data from wild-type and two yeast deletion strains.
• Profiled over 4700 proteins, covering approximately 80% of the yeast proteome.

Main Results:

• Protein extraction method significantly influenced proteomic data, overshadowing genetic variances.
• Detergent-based lysis demonstrated superior protein extraction efficiency compared to mechanical lysis.
• Observed consistent changes in specific proteins (Ino1, Rep1, Rep2, Snz1, Fdh1) in SUMO E3 ligase deletion strains, irrespective of lysis method.

Conclusions:

• Method selection in sample preparation is critical for reliable proteomic studies.
• Findings enhance understanding of cellular adaptations to genetic perturbations.