PXD042744-1
PXD042744 is an original dataset announced via ProteomeXchange.
Dataset Summary
Title | PPTC7 integrates homeostatic and physiological signals to regulate mitophagy and mitochondrial mass |
Description | Here we report that knockout of PPTC7, a mitochondrial matrix protein, hyperactivates BNIP3/NIX-mediated mitophagy in vitro and in vivo. Biochemically, the PPTC7 precursor is trapped by BNIP3 and NIX to mitochondrial outer-membrane, where PPTC7 scaffolds the assembly of the substrate-PPTC7- SCFFBXL4 holocomplex to degrade BNIP3 and NIX, forming a homeostatic regulatory loop. PPTC7 possesses an unusually weak mitochondrial targeting sequence to facilitate its outer-membrane retention and mitophagy control. Upon starvation, PPTC7 is transcriptionally upregulated in mouse liver to repress mitophagy, which critically maintains hepatic mitochondrial mass, bioenergetics and gluconeogenesis. Collectively, PPTC7 functions as a mitophagy sensor that integrates homeostatic and physiological signals to dynamically control BNIP3 and NIX degradation, thereby maintaining proper mitochondrial mass and cellular homeostasis. |
HostingRepository | iProX |
AnnounceDate | 2023-06-05 |
AnnouncementXML | Submission_2023-06-05_20:29:07.135.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Yuqiu Sun |
SpeciesList | scientific name: Homo sapiens; NCBI TaxID: 9606; |
ModificationList | acetylated residue; methionine oxidation with neutral loss of 64 Da |
Instrument | LTQ Orbitrap Velos; Orbitrap Fusion |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
---|---|---|---|
0 | 2023-06-05 20:28:42 | ID requested | |
⏵ 1 | 2023-06-05 20:29:07 | announced | |
2 | 2024-05-29 21:37:57 | announced | 2024-05-30: Update information. |
Publication List
Dataset with its publication pending |
Keyword List
submitter keyword: PPTC7, FBXL4, mitophagy receptors BNIP3 and NIX, ubiquitination, mitochondial mass, metabolism |
Contact List
Hui Jiang | |
---|---|
contact affiliation | National Institute of Biological Sciences, Beijing |
contact email | jianghui@nibs.ac.cn |
lab head | |
Yuqiu Sun | |
contact affiliation | National Institute of Biological Sciences, Beijing |
contact email | sunyuqiu@nibs.ac.cn |
dataset submitter |
Full Dataset Link List
iProX dataset URI |