PXD052965 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | Selective regulation of aspartyl intramembrane protease activity by calnexin |
Description | Signal peptide peptidase-like 2c (SPPL2c) is a testis-specific aspartyl intramembrane protease that contributes to male gamete function both by catalytic and non-proteolytic mechanisms. Here, we provide an unbiased characterisation of the in vivo interactome of SPPL2c identifying the ER chaperone calnexin as novel binding partner of this enzyme. Recruitment of calnexin specifically required the N-glycosylation within the N-terminal protease-associated domain of SPPL2c. Importantly, mutation of the single glycosylation site of SPPL2c or loss of calnexin expression completely prevented SPPL2c-mediated intramembrane proteolysis of all tested substrates. By contrast and despite rather promiscuous binding of calnexin to other SPP/SPPL proteases, expression of the chaperone was exclusively required for SPPL2c-mediated proteolysis. Despite some impact on the stability of SPPL2c most presumably due to assistance in folding of the luminal domain of the protease, calnexin appeared to be recruited rather constitutively to the protease thereby boosting its catalytic activity. In summary, we describe a novel, highly specific mode of intramembrane protease regulation, highlighting the need to systematically approach control mechanisms governing the proteolytic activity of other members of the aspartyl intramembrane protease family. |
HostingRepository | PRIDE |
AnnounceDate | 2025-05-07 |
AnnouncementXML | Submission_2025-05-06_18:36:00.845.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Marc Gentzel |
SpeciesList | scientific name: Mus musculus (Mouse); NCBI TaxID: 10090; |
ModificationList | monohydroxylated residue |
Instrument | Q Exactive HF |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2024-06-10 09:09:07 | ID requested | |
⏵ 1 | 2025-05-06 18:36:01 | announced | |
Publication List
Contreras W, Groenendyk J, Gentzel M, Sch, ö, nberg PY, Buchholz F, Michalak M, Schr, ö, der B, Mentrup T, Selective regulation of aspartyl intramembrane protease activity by calnexin. Cell Mol Life Sci, 81(1):441(2024) [pubmed] |
10.1007/s00018-024-05478-8; |
Keyword List
submitter keyword: Co-IP,Signal Peptide Peptidase-Like 2c, Mouse, Calnexin, SPPL2C, Testis |
Contact List
Torben Mentrup |
contact affiliation | Institute of Physiological Chemistry, Technische UniversitŠt Dresden, Dresden, Germany |
contact email | torben.mentrup@tu-dresden.de |
lab head | |
Marc Gentzel |
contact affiliation | Molecular Analysis - Mass Spectrometry,
Center for Molecular and Cellular Bioengineering (CMCB), TU Dresden |
contact email | marc.gentzel@tu-dresden.de |
dataset submitter | |
Full Dataset Link List
Dataset FTP location
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PRIDE project URI |
Repository Record List
[ + ]
[ - ]
- PRIDE
- PXD052965
- Label: PRIDE project
- Name: Selective regulation of aspartyl intramembrane protease activity by calnexin