aneuploidAneuploidy increases genomic instability and chromosome loss rates, requiring aneuploid strains to be grown in selective medium that maintains the duplicated chromosome. Different growth media (synthetic medium for SILAC versus rich YEPD medium for TMT analysis) may significantly influence the proteome composition of disomic strains and their responses to aneuploidy. [@dephoure_quantitative_2014]
Definitions
Synthesis
Studies using quantitative proteomics techniques such as SILAC and tandem mass tag mass spectrometry on aneuploid yeast strains have established that proteome composition is consistently altered by changes in chromosome number, with proteins encoded on duplicated chromosomes showing approximately twofold increases in abundance that track gene dosage with high fidelity across all examined disomic strains. However, the specific growth medium conditions under which these aneuploid strains are cultivated have been shown to affect their proteome composition, suggesting that environmental factors modulate the proteomic consequences of chromosomal imbalances. The mechanistic basis for how growth medium conditions interact with aneuploidy to shape the proteome remains an area requiring further investigation, as it is unclear whether nutritional differences trigger compensatory responses, alter protein degradation pathways, or influence the cellular capacity to buffer the stoichiometric imbalances created by chromosome gain or loss.
Related
- Quantitative proteomics measures 70-80% of yeast open reading frames
- Aneuploidy alters cellular protein composition approximately twofold