PXD040428 is an
original dataset announced via ProteomeXchange.
Dataset Summary
Title | UNC-45 assisted myosin folding depends on a conserved FX3HY motif implicated in Freeman Sheldon Syndrome |
Description | Myosin motors are critical for diverse motility functions ranging from cytokinesis and endocytosis to muscle contraction. The UNC-45 chaperone controls myosin function mediating the folding, assembly, and degradation of the muscle protein. Here, we analyze the molecular mechanism of UNC-45 as a hub in myosin quality control. We show that UNC-45 forms discrete complexes with folded and unfolded myosin, forwarding them to downstream chaperones and E3 ligases. Structural analysis of a minimal chaperone:substrate complex reveals that UNC-45 binds to a conserved FX3HY motif in the myosin motor domain. Disrupting the observed interface by mutagenesis prevents myosin maturation leading to protein aggregation in vivo. We also show that a mutation in the FX3HY motif linked to the Freeman Sheldon Syndrome impairs UNC-45 assisted folding, reducing the level of functional myosin. These findings demonstrate that a faulty myosin quality control is a critical yet unexplored cause of human myopathies. |
HostingRepository | PRIDE |
AnnounceDate | 2024-07-25 |
AnnouncementXML | Submission_2024-07-25_09:51:58.004.xml |
DigitalObjectIdentifier | |
ReviewLevel | Peer-reviewed dataset |
DatasetOrigin | Original dataset |
RepositorySupport | Unsupported dataset by repository |
PrimarySubmitter | Richard Imre |
SpeciesList | scientific name: Caenorhabditis elegans; NCBI TaxID: 6239; |
ModificationList | monohydroxylated residue; iodoacetamide derivatized residue |
Instrument | Q Exactive HF; Orbitrap Fusion Lumos |
Dataset History
Revision | Datetime | Status | ChangeLog Entry |
0 | 2023-02-27 05:19:31 | ID requested | |
⏵ 1 | 2024-07-25 09:51:58 | announced | |
2 | 2024-10-22 06:51:24 | announced | 2024-10-22: Updated project metadata. |
Publication List
Dataset with its publication pending |
Keyword List
submitter keyword: UFD-2, myopathy, MHC-B, Myo4,protein quality control, crosslinking mass spectrometry, ubiquitin proteasome system, UNC-45, molecular chaperones, myosin proteostasis |
Contact List
Tim Clausen |
contact affiliation | Research Institute of Molecular Pathology, Vienna BioCenter, Vienna, Austria |
contact email | tim.clausen@imp.ac.at |
lab head | |
Richard Imre |
contact affiliation | IMBA Vienna |
contact email | richard.imre@imba.oeaw.ac.at |
dataset submitter | |
Full Dataset Link List
Dataset FTP location
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PRIDE project URI |
Repository Record List
[ + ]
[ - ]
- PRIDE
- PXD040428
- Label: PRIDE project
- Name: UNC-45 assisted myosin folding depends on a conserved FX3HY motif implicated in Freeman Sheldon Syndrome