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PXD043998

PXD043998 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleMEF2B LC-MS in normal and malignant germinal center B cells.
DescriptionThe MEF2B transcription factor is frequently mutated in germinal center (GC)-derived B-cell lymphomas. Its N-terminal mutations drive lymphomagenesis by escaping interaction with transcriptional repressors, while the function of C-terminal mutations remains to be elucidated. Here, we show that MEF2B C-tail is physiologically phosphorylated at specific residues and phosphorylation at S324 is impaired by lymphoma-associated mutations. Lack of phosphorylation at S324 enhances the interaction of MEF2B with the SWI/SNF chromatin remodeling complex, leading to higher transcriptional activity. In addition, these mutants show an increased protein stability due to impaired interaction with the CUL3/KLHL12 ubiquitin complex. Mice expressing a phosphorylation-deficient lymphoma-associated MEF2B mutant display GC enlargement and develop GC-derived lymphomas, when crossed with Bcl2 transgenic mice. These results unveil converging mechanisms of action for a diverse spectrum of MEF2B mutations, all leading to its dysregulation and GC B-cell lymphomagenesis. These assorted mechanisms provide additional opportunities for the development of targeted therapeutic approaches.
HostingRepositoryPRIDE
AnnounceDate2024-10-22
AnnouncementXMLSubmission_2024-10-22_06:56:37.093.xml
DigitalObjectIdentifier
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterRajesh Soni
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListphosphorylated residue
InstrumentOrbitrap Fusion
Dataset History
RevisionDatetimeStatusChangeLog Entry
02023-07-21 18:50:08ID requested
12024-08-26 07:16:45announced
22024-10-22 06:56:37announced2024-10-22: Updated project metadata.
Publication List
10.1038/S41467-024-51644-8;
Keyword List
submitter keyword: MEF2B,Germinal Center B Cells, Phosphorylation
Contact List
Riccardo Dalla-Favera
contact affiliationProfessor of Pathology and Cell Biology, Genetics and Development and Microbiology and Immunology (in the Institute for Cancer Genetics and the Herbert Irving Comprehensive Cancer Center), New York
contact emailrd10@cumc.columbia.edu
lab head
Rajesh Soni
contact affiliationColumbia University Medical center
contact emailrs3869@cumc.columbia.edu
dataset submitter
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Dataset FTP location
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