PXD043336

PXD043336 is an original dataset announced via ProteomeXchange.

Title	RNA helicase Ighmbp2 regulates THO complex to ensure cellular mRNA homeostasis
Description	RNA helicases constitute a large protein family implicated in cellular RNA homeostasis and disease development. Here we show that the RNA helicase Ighmbp2, linked to the neuromuscular disorder SMARD1 (DSMA1) associates with polysomes and impacts on translation of cellular mRNAs containing short, GC-rich and highly structured 5’UTRs. Absence of Ighmbp2 causes ribosome stalling at the start codon of target mRNAs, leading to their reduced translation efficiency. The main mRNA targets of Ighmbp2-mediated regulation encode for components of the THO complex that links mRNA production and nuclear export. Accordingly, failure of Ighmbp2 regulation of the THO complex causes perturbations of the cellular transcriptome and its encoded proteome. Ablation of essential THO complex subunits phenocopies these perturbations. Thus, Ighmbp2 is an upstream regulator of the THO complex that impacts on cellular mRNA homeostasis. Of note, Ighmbp2 dependent regulation of the THO complex is also observed in astrocytes derived from DSMA1 patients, suggesting that de-regulated mRNA metabolism contributes to SMARD1 etiology.
HostingRepository	PRIDE
AnnounceDate	2024-02-15
AnnouncementXML	Submission_2024-02-15_08:15:09.441.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Andreas Schlosser
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	iodoacetamide derivatized residue
Instrument	LTQ Orbitrap Velos Pro

Revision	Datetime	Status	ChangeLog Entry
0	2023-06-27 04:12:00	ID requested
⏵ 1	2024-02-15 08:15:09	announced

10.1016/J.CELREP.2024.113802;

submitter keyword: THOC, mRNA-homeostasis, Ighmbp2, SMARD1,RNA helicase

Andreas Schlosser
contact affiliation	Rudolf-Virchow-Zentrum Center for Integrative and Translational Bioimaging University Würzburg Josef-Schneider-Str. 2 97080 Würzburg
contact email	andreas.schlosser@uni-wuerzburg.de
lab head
Andreas Schlosser
contact affiliation	Mass Spectrometry and Proteomics
contact email	andreas.schlosser@virchow.uni-wuerzburg.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD043336
     1. Label: PRIDE project
     2. Name: RNA helicase Ighmbp2 regulates THO complex to ensure cellular mRNA homeostasis