PXD025400

PXD025400 is an original dataset announced via ProteomeXchange.

Title	Translational activators and mitoribosomal isoforms cooperate to mediate mRNA-specific translation in Schizosaccharomyces pombe mitochondria
Description	Mitochondrial mRNAs encode key subunits of the oxidative phosphorylation complexes that produce energy for the cell. In Saccharomyces cerevisiae, mitochondrial translation is under the control of translational activators, specific to each mRNA. In Schizosaccharomyces pombe, which more closely resembles the human system by its mitochondrial DNA structure and physiology, most translational activators appear to be either lacking, or recruited for post-translational functions. By combining bioinformatics, genetic and biochemical approaches we identified two interacting factors, Cbp7 and Cbp8, controlling Cytb production in S. pombe. We show that their absence affects cytb mRNA stability and decreases the accumulation of the Cytb protein. We further identified two classes of Cbp7/Cbp8 partners and showed that they modulated Cytb or Cox1 synthesis. First, two isoforms of bS1m small mitoribosomal subunits, that appear mutually exclusive and confer translational specificity. Second, a complex of four proteins dedicated to Cox1 synthesis, which includes an RNA helicase that interacts with the mitochondrial ribosome. Our results suggest that S. pombecontains, in addition to complexes of translational activators, a heterogeneous population of mitochondrial ribosomes that could specifically modulate translation depending on the mRNA translated, in order to optimally balance the production of different respiratory complex subunits.
HostingRepository	PRIDE
AnnounceDate	2021-10-11
AnnouncementXML	Submission_2021-10-11_04:50:24.393.xml
DigitalObjectIdentifier	https://dx.doi.org/10.6019/PXD025400
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Supported dataset by repository
PrimarySubmitter	David Cornu
SpeciesList	scientific name: Schizosaccharomyces pombe 927; NCBI TaxID: 1264690;
ModificationList	acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	timsTOF Pro

Revision	Datetime	Status	ChangeLog Entry
0	2021-04-14 06:11:15	ID requested
⏵ 1	2021-10-11 04:50:24	announced

Dataset with its publication pending

submitter keyword: Immunoprecipitation, LC-MSMS

David Cornu
contact affiliation	Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
contact email	david.cornu@i2bc.paris-saclay.fr
lab head
David Cornu
contact affiliation	SICaPS, Institute of Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay 91198 Gif-sur-Yvette Cedex, France
contact email	david.cornu@i2bc.paris-saclay.fr
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD025400
     1. Label: PRIDE project
     2. Name: Translational activators and mitoribosomal isoforms cooperate to mediate mRNA-specific translation in Schizosaccharomyces pombe mitochondria