J 2016

p53 Specifically Binds Triplex DNA In Vitro and in Cells

BRÁZDOVÁ, Marie, Vlastimil TICHÝ, Robert HELMA, Pavla BAŽANTOVÁ, Alena POLÁŠKOVÁ et. al.

Základní údaje

Originální název

p53 Specifically Binds Triplex DNA In Vitro and in Cells

Autoři

BRÁZDOVÁ, Marie (203 Česká republika, garant), Vlastimil TICHÝ (203 Česká republika), Robert HELMA (203 Česká republika), Pavla BAŽANTOVÁ (203 Česká republika), Alena POLÁŠKOVÁ (203 Česká republika), Aneta KREJČÍ (203 Česká republika), Marek PETR (203 Česká republika), Lucie NAVRÁTILOVÁ (203 Česká republika), Olga TICHÁ (203 Česká republika), Karel NEJEDLÝ (203 Česká republika), Martin L BENNINK (528 Nizozemské království), Vinod SUBRAMANIAM (528 Nizozemské království), Zuzana BÁBKOVÁ (203 Česká republika), Tomáš MARTÍNEK (203 Česká republika), Matej LEXA (703 Slovensko, domácí) a Matej ADÁMIK (703 Slovensko)

Vydání

PLOS ONE, Public Library of Science, 2016, 1932-6203

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10608 Biochemistry and molecular biology

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 2.806

Kód RIV

RIV/00216224:14330/16:00088595

Organizační jednotka

Fakulta informatiky

UT WoS

000389482700156

Klíčová slova anglicky

cancer; H-DNA; non-B DNA; gene regulation; DNA binding;

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 20. 1. 2021 12:05, Mgr. Martina Zapletalová, Ph.D.

Anotace

V originále

Triplex DNA is implicated in a wide range of biological activities, including regulation of gene expression and genomic instability leading to cancer. The tumor suppressor p53 is a central regulator of cell fate in response to different type of insults. Sequence and structure specific modes of DNA recognition are core attributes of the p53 protein. The focus of this work is the structure-specific binding of p53 to DNA containing triplex-forming sequences in vitro and in cells and the effect on p53-driven transcription. This is the first DNA binding study of full-length p53 and its deletion variants to both intermolecular and intramolecular T.A.T triplexes. We demonstrate that the interaction of p53 with intermolecular T.A.T triplex is comparable to the recognition of CTG-hairpin non-B DNA structure. Using deletion mutants we determined the C-terminal DNA binding domain of p53 to be crucial for triplex recognition. Furthermore, strong p53 recognition of intramolecular T.A.T triplexes (H-DNA), stabilized by negative superhelicity in plasmid DNA, was detected by competition and immunoprecipitation experiments, and visualized by AFM. Moreover, chromatin immunoprecipitation revealed p53 binding T.A.T forming sequence in vivo. Enhanced reporter transactivation by p53 on insertion of triplex forming sequence into plasmid with p53 consensus sequence was observed by luciferase reporter assays. In-silico scan of human regulatory regions for the simultaneous presence of both consensus sequence and T.A.T motifs identified a set of candidate p53 target genes and p53-dependent activation of several of them (ABCG5, ENOX1, INSR, MCC, NFAT5) was confirmed by RT-qPCR. Our results show that T.A.T triplex comprises a new class of p53 binding sites targeted by p53 in a DNA structure-dependent mode in vitro and in cells. The contribution of p53 DNA structure-dependent binding to the regulation of transcription is discussed.

Návaznosti

GA15-02891S, projekt VaV
Název: Rostlinné transpozony a konformace DNA
Investor: Grantová agentura ČR, Rostlinné transpozony a konformace DNA