The structure, binding and function of a Notch transcription complex involving RBPJ and the epigenetic reader protein L3MBTL3.
Animals
Humans
DNA-Binding Proteins
/ metabolism
Epigenesis, Genetic
Gene Expression Regulation
Histone Demethylases
/ genetics
Immunoglobulin J Recombination Signal Sequence-Binding Protein
/ genetics
Intracellular Signaling Peptides and Proteins
/ genetics
LIM Domain Proteins
/ metabolism
Muscle Proteins
/ genetics
Protein Binding
Receptors, Notch
/ genetics
Journal
Nucleic acids research
ISSN: 1362-4962
Titre abrégé: Nucleic Acids Res
Pays: England
ID NLM: 0411011
Informations de publication
Date de publication:
09 12 2022
09 12 2022
Historique:
accepted:
14
11
2022
revised:
01
10
2022
received:
18
02
2022
pubmed:
9
12
2022
medline:
11
1
2023
entrez:
8
12
2022
Statut:
ppublish
Résumé
The Notch pathway transmits signals between neighboring cells to elicit downstream transcriptional programs. Notch is a major regulator of cell fate specification, proliferation, and apoptosis, such that aberrant signaling leads to a pleiotropy of human diseases, including developmental disorders and cancers. The pathway signals through the transcription factor CSL (RBPJ in mammals), which forms an activation complex with the intracellular domain of the Notch receptor and the coactivator Mastermind. CSL can also function as a transcriptional repressor by forming complexes with one of several different corepressor proteins, such as FHL1 or SHARP in mammals and Hairless in Drosophila. Recently, we identified L3MBTL3 as a bona fide RBPJ-binding corepressor that recruits the repressive lysine demethylase LSD1/KDM1A to Notch target genes. Here, we define the RBPJ-interacting domain of L3MBTL3 and report the 2.06 Å crystal structure of the RBPJ-L3MBTL3-DNA complex. The structure reveals that L3MBTL3 interacts with RBPJ via an unusual binding motif compared to other RBPJ binding partners, which we comprehensively analyze with a series of structure-based mutants. We also show that these disruptive mutations affect RBPJ and L3MBTL3 function in cells, providing further insights into Notch mediated transcriptional regulation.
Identifiants
pubmed: 36477367
pii: 6882124
doi: 10.1093/nar/gkac1137
pmc: PMC9825171
doi:
Substances chimiques
DNA-Binding Proteins
0
FHL1 protein, human
0
Histone Demethylases
EC 1.14.11.-
Immunoglobulin J Recombination Signal Sequence-Binding Protein
0
Intracellular Signaling Peptides and Proteins
0
KDM1A protein, human
EC 1.5.-
L3MBTL3 protein, human
0
LIM Domain Proteins
0
Muscle Proteins
0
RBPJ protein, human
0
Receptors, Notch
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
13083-13099Subventions
Organisme : NIEHS NIH HHS
ID : T32 ES007250
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA178974
Pays : United States
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press on behalf of Nucleic Acids Research.
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