Language
English
Publication Date
12-1-2024
Journal
Nature Chemical Biology
DOI
10.1038/s41589-024-01668-4
PMID
39075252
PMCID
PMC11582070
PubMedCentral® Posted Date
7-29-2024
PubMedCentral® Full Text Version
Post-print
Abstract
Molecular glues are proximity-inducing small molecules that have emerged as an attractive therapeutic approach. However, developing molecular glues remains challenging, requiring innovative mechanistic strategies to stabilize neoprotein interfaces and expedite discovery. Here we unveil a trans-labeling covalent molecular glue mechanism, termed ‘template-assisted covalent modification’. We identified a new series of BRD4 molecular glue degraders that recruit CUL4DCAF16 ligase to the second bromodomain of BRD4 (BRD4BD2). Through comprehensive biochemical, structural and mutagenesis analyses, we elucidated how pre-existing structural complementarity between DCAF16 and BRD4BD2 serves as a template to optimally orient the degrader for covalent modification of DCAF16Cys58. This process stabilizes the formation of BRD4–degrader–DCAF16 ternary complex and facilitates BRD4 degradation. Supporting generalizability, we found that a subset of degraders also induces GAK–BRD4BD2 interaction through trans-labeling of GAK. Together, our work establishes ‘template-assisted covalent modification’ as a mechanism for covalent molecular glues, which opens a new path to proximity-driven pharmacology.
Keywords
Transcription Factors, Humans, Cell Cycle Proteins, Proteolysis, HEK293 Cells, Protein Binding, Models, Molecular, Bromodomain Containing Proteins, Small molecules, Structural biology, Medicinal chemistry, Mechanism of action
Published Open-Access
yes
Recommended Citation
Li, Yen-Der; Ma, Michelle W; Hassan, Muhammad Murtaza; et al., "Template-Assisted Covalent Modification Underlies Activity of Covalent Molecular Glues" (2024). Faculty and Staff Publications. 3853.
https://digitalcommons.library.tmc.edu/baylor_docs/3853