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PXD016185 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleSmall molecule-induced polymerization triggers degradation of BCL6
DescriptionMost small-molecule protein degraders act as interface stabilizers ‘molecular glues’ between E3 ubiquitin ligases and target proteins to induce ternary complex formation and ubiquitin-dependent target protein degradation. Here we report polymerization as a novel mechanism for small molecule-induced degradation. Using functional screens in combination with molecular and biochemical assays, we found that BI-3802, which binds to the BTB domain of the oncogenic transcription factor BCL6, induces polymerization of BCL6 into regular helical structures in vitro and foci in vivo. Polymerization precedes degradation by the SIAH1 E3 ubiquitin ligase. Hereby, a VxP amino acid motif on BCL6, distal from the drug-binding BTB domain, is required for SIAH1 binding, ubiquitination and BI-3802-induced degradation. Our findings propose that small molecule-induced polymerization is not only a new modality for targeted protein degradation, but also provides synthetic biology with a tool for tunable protein polymerization and opens new avenues for future drug design.
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportUnsupported dataset by repository
PrimarySubmitterEric Fischer
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListTMT6plex-126 reporter+balance reagent acylated residue; iodoacetamide derivatized residue
InstrumentOrbitrap Fusion Lumos
Dataset History
RevisionDatetimeStatusChangeLog Entry
02019-11-07 02:10:50ID requested
12020-11-20 08:10:31announced
22020-12-03 23:18:42announced2020-12-04: Updated publication reference for PubMed record(s): 33208943.
Publication List
Dataset with its publication pending
Keyword List
submitter keyword: BCL6, SIAH1, ubiquitin, molecular glue, BTB, polymerization, DLBCL
Contact List
Eric Fischer
contact affiliationDepartment of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA., Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
contact emaileric_fischer@dfci.harvard.edu
lab head
Eric Fischer
contact affiliationDana-Farber Cancer Institute
contact emaileric_fischer@dfci.harvard.edu
dataset submitter
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