PXD021799-1

PXD021799 is an original dataset announced via ProteomeXchange.

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

Revision	Datetime	Status	ChangeLog Entry
0	2020-10-02 04:19:00	ID requested
⏵ 1	2021-05-19 01:37:16	announced

Dataset with its publication pending

submitter keyword: mtSSB, mtDNA, replication, TMT

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

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/2021/05/PXD021799

PRIDE project URI

• PRIDE
  1. PXD021799
     1. Label: PRIDE project
     2. Name: The mitochondrial single-stranded DNA binding protein directs RNA primer formation for mtDNA replication