PXD021799 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | The mitochondrial single-stranded DNA binding protein directs RNA primer formation for mtDNA replication |
Description | Single-stranded DNA (ssDNA) binding proteins protect regions of ssDNA formed during processes such as DNA replication and repair. We here devise a genetic screen and identify the mitochondrial ssDNA-binding protein (mtSSB) as a key regulator of mtDNA levels. In mitochondria, RNA synthesis from the light-strand promoter (LSP) is required for transcription as well as for generating the primers for initiation of mtDNA synthesis. We find that mtSSB is essential for mtDNA replication initiation, as transcription is strongly upregulated from the LSP in an mtSSB knockout mouse model, but cannot support the switch to replication. Using deep sequencing as well as biochemical reconstitution experiments, we find that mtSSB is also necessary to restrict transcription initiation and primer formation to specific promoters and origins of replication both in vitro and in vivo. Pathological mutations in human mtSSB cannot efficiently support primer maturation and origin specific initiation of mtDNA replication in vitro. |
HostingRepository | PRIDE |
AnnounceDate | 2021-05-19 |
AnnouncementXML | Submission_2021-05-19_01:37:16.244.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Ilian Atanassov |
SpeciesList | scientific name: Mus musculus (Mouse); NCBI TaxID: 10090; |
ModificationList | TMT6plex-126 reporter+balance reagent acylated residue; acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue |
Instrument | Orbitrap Fusion Lumos |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2020-10-02 04:19:00 | ID requested | |
⏵ 1 | 2021-05-19 01:37:16 | announced | |
Publication List
Dataset with its publication pending |
Keyword List
submitter keyword: mtSSB, mtDNA, replication, TMT |
Contact List
Nils-Göran Larsson |
contact affiliation | Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 17177, Sweden Max Planck Institute for Biology of Ageing - Karolinska Institutet Laboratory, Karolinska Institutet, Stockholm 17177, Sweden |
contact email | nils-goran.larsson@ki.se |
lab head | |
Ilian Atanassov |
contact affiliation | Max Planck Institute for Biology of Aging |
contact email | Ilian.Atanassov@age.mpg.de |
dataset submitter | |
Full Dataset Link List
Dataset FTP location
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PRIDE project URI |
Repository Record List
[ + ]
[ - ]
- PRIDE
- PXD021799
- Label: PRIDE project
- Name: The mitochondrial single-stranded DNA binding protein directs RNA primer formation for mtDNA replication