PXD061449

PXD061449 is an original dataset announced via ProteomeXchange.

Title	SILAC-based subcellular fraction of DNJAC15 and DNAJC19 knockdown in HeLa cells
Description	Mitochondria adapt to cellular stress to ensure cell survival. The stress-regulated mitochondrial peptidase OMA1 orchestrates these adaptive responses, which limit mitochondrial fusion and promote mitochondrial stress signaling and metabolic rewiring. Here, we show that cellular stress adaptation involves OMA1-mediated regulation of mitochondrial protein import and OXPHOS biogenesis. OMA1 cleaves the mitochondrial chaperone DNAJC15 and promotes its degradation by the m-AAA protease AFG3L2. Loss of DNAJC15 reduces the import of OXPHOS-related proteins via the TIMM23-TIMM17A protein translocase, limiting OXPHOS biogenesis under conditions of mitochondrial dysfunction. Non-imported mitochondrial preproteins accumulate at the endoplasmic reticulum and induce an ATF6-related unfolded protein response. Our results demonstrate stress-dependent changes in protein import specificity as part of the OMA1-mediated mitochondrial stress response and highlight the interdependence of proteostasis regulation between different organelles. This submission is related to: The samples are described in an accompanied Excel file.
HostingRepository	PRIDE
AnnounceDate	2025-12-16
AnnouncementXML	Submission_2025-12-16_06:07:25.473.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Hendrik Nolte
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: NEWT:9606;
ModificationList	No PTMs are included in the dataset
Instrument	Orbitrap Exploris 480

Revision	Datetime	Status	ChangeLog Entry
0	2025-03-04 04:38:38	ID requested
⏵ 1	2025-12-16 06:07:26	announced

Dataset with its publication pending

submitter keyword: Mitochondria, HUman, HeLa, DNAJC15,SILAC

Thomas Langer
contact affiliation	Max-Planck-Institute for Biology of Ageing Department of Mitochondrial Proteostasis Joseph-Stelzmann-Str. 9b 50931 Cologne
contact email	tlanger@age.mpg.de
lab head
Hendrik Nolte
contact affiliation	Max Planck Institute for Biology of Ageing, 50931 Cologne, Germany
contact email	h.nolte@age.mpg.de
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2025/12/PXD061449

PRIDE project URI

• PRIDE
  1. PXD061449
     1. Label: PRIDE project
     2. Name: SILAC-based subcellular fraction of DNJAC15 and DNAJC19 knockdown in HeLa cells