PXD018987

PXD018987 is an original dataset announced via ProteomeXchange.

Title	Arabidopsis mTERF9 protein promotes chloroplast ribosomal assembly and translation by establishing ribonucleoprotein interactions in vivo
Description	The mitochondrial transcription termination factor proteins are nuclear-encoded nucleic acid binders defined by degenerate tandem helical-repeats of ~30 amino acids. They are found in metazoans and plants where they localize in organelles. In higher plants, the mTERF family comprises ~30 members and several of these have been linked to plant development and response to abiotic stress. However, knowledge of the molecular basis underlying these physiological effects is scare. We show that the Arabidopsis mTERF9 protein, promotes the accumulation of the 16S rRNA and the formation of the 23S rRNA first hidden break in chloroplasts, and co-immunoprecipitates with the 16S rRNA. Furthermore, mTERF9 is found in large complexes containing ribosomes and polysomes in chloroplasts. The analysis of the in vivo mTERF9 protein interactome identified many ribosomal proteins whose assembly into 70S ribosomes is compromised in the null mterf9 mutant. mTERF9 additionally interacts with putative ribosome biogenesis factors and CPN60 chaperonins. Yeast protein interaction assays revealed that mTERF9 has the capacity to directly interact with these proteins. Our data demonstrate that mTERF9 integrates protein-protein and protein-RNA interactions to promote chloroplast ribosomal assembly and translation. Besides extending our knowledge of mTERF molecular functions in plants, these findings provide important insight into the chloroplast ribosome biogenesis.
HostingRepository	PRIDE
AnnounceDate	2020-12-15
AnnouncementXML	Submission_2020-12-15_05:57:53.xml
DigitalObjectIdentifier	https://dx.doi.org/10.6019/PXD018987
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Supported dataset by repository
PrimarySubmitter	Lauriane Kuhn
SpeciesList	scientific name: Arabidopsis thaliana (Mouse-ear cress); NCBI TaxID: 3702;
ModificationList	Phospho; Oxidation; Acetyl; Carbamidomethyl
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2020-05-05 00:55:08	ID requested
⏵ 1	2020-12-15 05:57:54	announced

Dataset with its publication pending

submitter keyword: mTERF, chloroplast, ribosome, RNA

Kamel Hammani
contact affiliation	Institut de Biologie Moléculaire des Plantes, Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg, France.
contact email	kamel.hammani@ibmp-cnrs.unistra.fr
lab head
Lauriane Kuhn
contact affiliation	CNRS, IBMC, FRC1589
contact email	l.kuhn@ibmc-cnrs.unistra.fr
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD018987
     1. Label: PRIDE project
     2. Name: Arabidopsis mTERF9 protein promotes chloroplast ribosomal assembly and translation by establishing ribonucleoprotein interactions in vivo