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Title: Structural and Functional Studies of the RBPJ-SHARP Complex Reveal a Conserved Corepressor Binding Site

Journal Article · · Cell Reports

Notch is a conserved signaling pathway that is essential for metazoan development and homeostasis; dysregulated signaling underlies the pathophysiology of numerous human diseases. Receptor-ligand interactions result in gene expression changes, which are regulated by the transcription factor RBPJ. RBPJ forms a complex with the intracellular domain of the Notch receptor and the coactivator Mastermind to activate transcription, but it can also function as a repressor by interacting with corepressor proteins. Here, we determine the structure of RBPJ bound to the corepressor SHARP and DNA, revealing its mode of binding to RBPJ. We tested structure-based mutants in biophysical and biochemical-cellular assays to characterize the role of RBPJ as a repressor, clearly demonstrating that RBPJ mutants deficient for SHARP binding are incapable of repressing transcription of genes responsive to Notch signaling in cells. Altogether, our structure-function studies provide significant insights into the repressor function of RBPJ.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH); German Research Foundation (DFG); Excellence Cluster for Cardio Pulmonary System (ECCPS); University Medical Center Giessen and Marburg (UKGM); Federal Ministry of Education and Research, Research Nucleus SyStAR
Grant/Contract Number:
AC02-06CH11357; 5R01CA178974; TRR81; BO 1639/9-1; SFB1074/A3; GRK 2253 – HEIST
OSTI ID:
1569868
Journal Information:
Cell Reports, Vol. 26, Issue 4; ISSN 2211-1247
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

References (47)

Structural and functional analysis of the repressor complex in the Notch signaling pathway of Drosophila melanogaster journal September 2011
Structure and Function of the CSL-KyoT2 Corepressor Complex: A Negative Regulator of Notch Signaling journal January 2014
Histone variant H2A.Z deposition and acetylation directs the canonical Notch signaling response journal July 2018
A synergistic approach to protein crystallization: Combination of a fixed-arm carrier with surface entropy reduction journal January 2010
Crystal structure of the nuclear effector of Notch signaling, CSL, bound to DNA journal August 2004
Structural Basis for Cooperativity in Recruitment of MAML Coactivators to Notch Transcription Complexes journal March 2006
The contribution of Notch1 to nephron segmentation in the developing kidney is revealed in a sensitized Notch2 background and can be augmented by reducing Mint dosage journal January 2010
Structure and Function of the Su(H)-Hairless Repressor Complex, the Major Antagonist of Notch Signaling in Drosophila melanogaster journal July 2016
Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines journal June 2017
RITA, a novel modulator of Notch signalling, acts via nuclear export of RBP-J journal November 2010
Role of co-repressor genomic landscapes in shaping the Notch response journal November 2017
Msx2-interacting nuclear target protein (Mint) deficiency reveals negative regulation of early thymocyte differentiation by Notch/RBP-J signaling journal January 2007
A conserved structural motif reveals the essential transcriptional repression function of Spen proteins and their role in developmental signaling journal August 2003
Notch Signaling in Development, Tissue Homeostasis, and Disease journal October 2017
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Regulation of Marginal Zone B Cell Development by MINT, a Suppressor of Notch/RBP-J Signaling Pathway journal February 2003
Transcriptional Repression in the Notch Pathway: THERMODYNAMIC CHARACTERIZATION OF CSL-MINT (Msx2-INTERACTING NUCLEAR TARGET PROTEIN) COMPLEXES journal March 2011
SHARP is a novel component of the Notch/RBP-Jkappa signalling pathway journal October 2002
The RRM Domain of MINT, a Novel Msx2 Binding Protein, Recognizes and Regulates the Rat Osteocalcin Promoter journal July 1999
Sharp, an inducible cofactor that integrates nuclear receptor repression and activation journal May 2001
MolProbity: all-atom contacts and structure validation for proteins and nucleic acids journal May 2007
Thermodynamic Analysis of the CSL·Notch Interaction journal February 2010
Notch signalling in context journal August 2016
The Canonical Notch Signaling Pathway: Structural and Biochemical Insights into Shape, Sugar, and Force journal May 2017
Quantitative Dissection of the Notch:CSL Interaction: Insights into the Notch-mediated Transcriptional Switch journal January 2007
A phospho-dependent mechanism involving NCoR and KMT2D controls a permissive chromatin state at Notch target genes journal February 2016
Dynamic binding of RBPJ is determined by Notch signaling status journal May 2013
The Notch signaling pathway: Transcriptional regulation at Notch target genes journal January 2009
From Fly Wings to Targeted Cancer Therapies: A Centennial for Notch Signaling journal March 2014
Hairless: the ignored antagonist of the Notch signalling pathway: Hairless: ignored antagonist of the Notch pathway journal November 2006
Inference of Macromolecular Assemblies from Crystalline State journal September 2007
Mutational and Energetic Studies of Notch1 Transcription Complexes journal February 2008
RBPJ/CBF1 interacts with L3MBTL3/MBT1 to promote repression of Notch signaling via histone demethylaseKDM1A/LSD1 journal October 2017
Crystal Structure of the CSL-Notch-Mastermind Ternary Complex Bound to DNA journal March 2006
Conservation of the Notch antagonist Hairless in arthropods: functional analysis of the crustacean Daphnia pulex Hairless gene journal August 2017
Phaser crystallographic software journal July 2007
Exploiting structure similarity in refinement: automated NCS and target-structure restraints in BUSTER journal March 2012
Characterization of CSL (CBF-1, Su(H), Lag-1) Mutants Reveals Differences in Signaling Mediated by Notch1 and Notch2 journal October 2012
The Notch Transcription Activation Complex Makes Its Move journal March 2006
Keeping Notch Target Genes off: A CSL Corepressor Caught in the Act journal January 2014
Structure-function analysis of RBP-J-interacting and tubulin-associated (RITA) reveals regions critical for repression of Notch target genes journal June 2017
RAM-induced Allostery Facilitates Assembly of a Notch Pathway Active Transcription Complex journal April 2008
LIM Protein KyoT2 Negatively Regulates Transcription by Association with the RBP-J DNA-Binding Protein journal January 1998
Setting the Stage for Notch: The Drosophila Su(H)-Hairless Repressor Complex journal July 2016
MolProbity: all-atom contacts and structure validation for proteins and nucleic acids text January 2007
Role of co-repressor genomic landscapes in shaping the Notch response. journalarticle January 2017
PHENIX: a comprehensive Python-based system for macromolecular structure solution. text January 2010

Figures / Tables (4)