PXD034342 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | Human mitochondria require mtRF1 for translation termination at non-canonical stop codons |
Description | Mitochondrial translation system highly diverged from its bacterial counterpart. This includes deviation from the universal genetic code, with AGA and AGG having no cognate tRNAs in human mitochondria. Their locations at the end of COX1 and ND6 open reading frames, respectively, suggests they function as stop codons. However, while canonical stop codons, UAA and UAG, are recognized by mtRF1a in mitochondria, the release mechanism at AGA and AGG remains a debated issue. Here, we show that upon the loss of another member of the mitochondrial release factor family, mtRF1, mitoribosomes accumulate specifically at AGA and AGG codons. Stalling of mitoribosomes alters COX1 transcript and protein levels, but not ND6 production. Finally, we set up an in vitro reconstituted mitochondrial translation system, which confirms the specific release activity of mtRF1 on AGA and AGG codons. Together, our study uncovers the mechanism of translation termination in mitochondria and provides first insights into the consequences of its failure. |
HostingRepository | PRIDE |
AnnounceDate | 2022-11-16 |
AnnouncementXML | Submission_2022-11-16_01:44:45.800.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Ilian Atanassov |
SpeciesList | scientific name: Homo sapiens (Human); NCBI TaxID: 9606; |
ModificationList | TMT6plex-126 reporter+balance reagent acylated residue; acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue |
Instrument | Orbitrap Fusion |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2022-06-06 02:02:15 | ID requested | |
⏵ 1 | 2022-11-16 01:44:46 | announced | |
Publication List
Dataset with its publication pending |
Keyword List
submitter keyword: mtRF1, TMT, mitochondria, translation |
Contact List
JoannaRorbach |
contact affiliation | Department of Medical Biochemistry and Biophysics, Division of Molecular Metabolism, Karolinska Institutet, Biomedicum, 171 65 Solna, Sweden. Max Planck Institute Biology of Ageing - Karolinska Institutet Laboratory, Karolinska Institutet, Stockholm, Sweden. |
contact email | Joanna.rorbach@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
- PXD034342
- Label: PRIDE project
- Name: Human mitochondria require mtRF1 for translation termination at non-canonical stop codons