⮝ Full datasets listing
PXD059914-1
PXD059914 is an original dataset announced via ProteomeXchange.
Dataset Summary
| Title | Laminin-a2 is required for the maintenance of the myotendinous junction in vivo |
| Description | The myotendinous junction (MTJ) is a critical interface between muscle fibers and tendons, essential for force transmission between muscle and bone. Laminin-a2, a key extracellular matrix (ECM) component, is strongly enriched at this interface. Mutations in the LAMA2 gene cause LAMA2-related muscular dystrophy (LAMA2 MD), an early-onset severe congenital muscular dystrophy. Here, we examined the MTJ in dyW/dyW mice, a mouse model for LAMA2 MD. We find a strong disruption of MTJ morphology, including altered muscle fiber tips, collagen XXII mislocalization, and reduced muscle tendon interface. As MTJ loading is altered in dyW/dyW mice and MTJ maintenance requires loading and unloading, we also examined MTJ structures upon denervation-induced unloading. While muscle fiber tip morphology resembled that of dyW/dyW mice, collagen XXII distribution was not affected and the muscle–tendon interface was preserved. Finally, proteomic profiling via laser capture microdissection and mass spectrometry revealed significant regional and global shifts in MTJ protein composition in dyW/dyW and denervated mice. Across both models, we identified integrin-associated remodeling as a shared response linked to the perturbed muscle fiber tip morphology. These findings demonstrate that laminin-a2 is required for MTJ stability, and that mechanical unloading contributes to the observed phenotype. Importantly, our results suggest that disruptions in MTJ structure and protein composition may contribute to the pathology observed in LAMA2 MD. |
| HostingRepository | MassIVE |
| AnnounceDate | 2026-03-26 |
| AnnouncementXML | Submission_2026-03-26_02:09:48.197.xml |
| DigitalObjectIdentifier | |
| ReviewLevel | Non peer-reviewed dataset |
| DatasetOrigin | Original dataset |
| RepositorySupport | Unsupported dataset by repository |
| PrimarySubmitter | Thomas Bock |
| SpeciesList | scientific name: Mus musculus; common name: house mouse; NCBI TaxID: 10090; |
| ModificationList | No PTMs are included in the dataset |
| Instrument | Orbitrap Eclipse; timsTOF Ultra |
Dataset History
| Revision | Datetime | Status | ChangeLog Entry |
|---|---|---|---|
| 0 | 2025-01-17 02:54:34 | ID requested | |
| ⏵ 1 | 2026-03-26 02:09:48 | announced |
Publication List
| no publication |
Keyword List
| submitter keyword: Laminin, Myotendinous Junction, DatasetType:Proteomics |
Contact List
| Alexander Schmidt | |
|---|---|
| contact affiliation | Biozentrum, Universtiy of Basel, 4056 Basel, Switzerland |
| contact email | alex.schmidt@unibas.ch |
| lab head | |
| Thomas Bock | |
| contact affiliation | Uni Basel |
| contact email | thomas.bock@unibas.ch |
| dataset submitter | |
Full Dataset Link List
| MassIVE dataset URI |
| Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://massive-ftp.ucsd.edu/v06/MSV000096882/ |
