TIRR inhibits the 53BP1-p53 complex to alter cell-fate programs.
Binding Sites
Carrier Proteins
/ metabolism
Cell Line, Tumor
Cell Lineage
/ genetics
DNA
/ genetics
DNA Breaks, Double-Stranded
DNA Repair
Histones
/ metabolism
Humans
Protein Binding
RNA-Binding Proteins
/ metabolism
Tudor Domain
Tumor Suppressor Protein p53
/ metabolism
Tumor Suppressor p53-Binding Protein 1
/ metabolism
53BP1
NMR
TIRR
Tudor
cancer
cell fate
p53
senescence
survival
transcription factor
Journal
Molecular cell
ISSN: 1097-4164
Titre abrégé: Mol Cell
Pays: United States
ID NLM: 9802571
Informations de publication
Date de publication:
17 06 2021
17 06 2021
Historique:
received:
02
09
2020
revised:
19
01
2021
accepted:
24
03
2021
pubmed:
8
5
2021
medline:
21
7
2021
entrez:
7
5
2021
Statut:
ppublish
Résumé
53BP1 influences genome stability via two independent mechanisms: (1) regulating DNA double-strand break (DSB) repair and (2) enhancing p53 activity. We discovered a protein, Tudor-interacting repair regulator (TIRR), that associates with the 53BP1 Tudor domain and prevents its recruitment to DSBs. Here, we elucidate how TIRR affects 53BP1 function beyond its recruitment to DSBs and biochemically links the two distinct roles of 53BP1. Loss of TIRR causes an aberrant increase in the gene transactivation function of p53, affecting several p53-mediated cell-fate programs. TIRR inhibits the complex formation between the Tudor domain of 53BP1 and a dimethylated form of p53 (K382me2) that is poised for transcriptional activation of its target genes. TIRR mRNA expression levels negatively correlate with the expression of key p53 target genes in breast and prostate cancers. Further, TIRR loss is selectively not tolerated in p53-proficient tumors. Therefore, we establish that TIRR is an important inhibitor of the 53BP1-p53 complex.
Identifiants
pubmed: 33961797
pii: S1097-2765(21)00234-3
doi: 10.1016/j.molcel.2021.03.039
pmc: PMC8536467
mid: NIHMS1746068
pii:
doi:
Substances chimiques
Carrier Proteins
0
Histones
0
NUDT16L1 protein, human
0
RNA-Binding Proteins
0
TP53BP1 protein, human
0
Tumor Suppressor Protein p53
0
Tumor Suppressor p53-Binding Protein 1
0
DNA
9007-49-2
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
2583-2595.e6Subventions
Organisme : NCI NIH HHS
ID : R01 CA132878
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA142698
Pays : United States
Organisme : NCI NIH HHS
ID : R01 CA208244
Pays : United States
Organisme : NIGMS NIH HHS
ID : R35 GM136262
Pays : United States
Informations de copyright
Copyright © 2021 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests D.C. is a member of the Advisory Board of Molecular Cell.
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