PXD037085-1

PXD037085 is an original dataset announced via ProteomeXchange.

Title	The natural diversity of the yeast proteome reveals chromosome-wide dosage compensation in aneuploids
Description	Aneuploidy, an imbalance in chromosome copy numbers, causes genetic disorders, and drives cancer progression, drug tolerance, and antimicrobial resistance. While aneuploidy can confer stress resistance, it is not well understood how cells overcome the fitness burden caused by aberrant chromosomal copy numbers. Studies using both systematically generated and natural aneuploid yeasts triggered an intense debate about the role of dosage compensation, concluding that aneuploidy is transmitted to the transcriptome and proteome without significant buffering at the chromosome-wide level, and is, at least in lab strains, associated with significant fitness costs. Conversely, systematic sequencing and phenotyping of large collections of natural isolates revealed that aneuploidy is frequent and has few, if any, fitness costs in nature. To address these discrepant findings, we developed a platform that yields highly precise proteomic measurements across large numbers of genetically diverse samples and applied it to natural isolates collected as part of the 1011 genomes project (Peter, J. et al, 2018). For 613 of the isolates, we were able to match the proteomes to their corresponding transcriptomes and genomes, subsequently quantifying the effect of aneuploidy on gene expression by comparing 95 aneuploid with 518 euploid strains. We find, as in previous studies, that aneuploid gene dosage is not buffered chromosome-wide at the transcriptome level. Importantly, in the proteome, we detect an attenuation of aneuploidy by about 25% below the aneuploid gene dosage in natural yeast isolates. Furthermore, this chromosome-wide dosage compensation is associated with the ubiquitin-proteasome system (UPS), which is expressed at higher levels and has increased activity across natural aneuploid strains. Thus, through systematic exploration of the species-wide diversity of the yeast proteome, we shed light on a long-standing debate about the biology of aneuploids, revealing that aneuploidy tolerance is mediated through chromosome-wide dosage compensation at the proteome level.
HostingRepository	MassIVE
AnnounceDate	2024-03-11
AnnouncementXML	Submission_2024-03-11_22:08:28.993.xml
DigitalObjectIdentifier
ReviewLevel	Non peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Christoph Messner
SpeciesList	scientific name: Yeast;
ModificationList	No PTMs are included in the dataset
Instrument	TripleTOF 6600

Revision	Datetime	Status	ChangeLog Entry
0	2022-09-30 01:44:43	ID requested
⏵ 1	2024-03-11 22:08:29	announced

no publication

submitter keyword: Yeast, large-scale, high-throughput, diversity, aneuploidy, proteomics, wild isolates

Prof. Dr. Markus Ralser
contact affiliation	Charite Universitatsmedizin Berlin
contact email	markus.ralser@charite.de
lab head
Christoph Messner
contact affiliation	University of Z�rich
contact email	messner.ch@gmail.com
dataset submitter

MassIVE dataset URI

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