The p53 response during DNA damage: impact of transcriptional cofactors

2006 ◽  
Vol 73 ◽  
pp. 181-189 ◽  
Author(s):  
Amanda S. Coutts ◽  
Nicholas La Thangue
Keyword(s):  
Dna Damage ◽  
Dna Damage Response ◽  
Ataxia Telangiectasia ◽  
Cell Cycle Control ◽  
Regulatory Protein ◽  
Serine Threonine Kinase ◽  
Receptor Associated Protein ◽  
Transcriptional Cofactors ◽  
Damage Response ◽  
P53 Response

Defects in the DNA damage response pathways can lead to tumour development. The tumour suppressor p53 is a key player in the DNA damage response, and the precise regulation of p53 is critical for the suppression of tumorigenesis. DNA damage induces the activity of p53, via damage sensors such as ATM (ataxia telangiectasia mutated) and ATR (ataxia telangiectasia-related), which leads to the transcriptional regulation of a variety of genes involved in cell cycle control and apoptosis. p53 is therefore tightly controlled, and its activity is regulated at a multiplicity of levels. An increasing array of cofactors are now known to influence p53 activity. Here we will discuss several of the cofactors that impact on p53 activity, specifically those involved in the function of the two novel p53 cofactors JMY (junction-mediating and regulatory protein) and Strap (serine/threonine-kinase-receptor-associated protein).

Breaking the DNA Damage Response via Serine/Threonine Kinase Inhibitors to Improve Cancer Treatment

2019 ◽  
Vol 26 (8) ◽  
pp. 1425-1445 ◽  
Author(s):  
Wioletta Rozpędek ◽  
Dariusz Pytel ◽  
Alicja Nowak-Zduńczyk ◽  
Dawid Lewko ◽  
Radosław Wojtczak ◽  
...  
Keyword(s):  
Dna Damage ◽  
Dna Replication ◽  
Cancer Treatment ◽  
Dna Damage Response ◽  
Ataxia Telangiectasia ◽  
Kinase Inhibitors ◽  
Serine Threonine Kinase ◽  
Threonine Kinase ◽  
Anti Cancer ◽  
Damage Response

Multiple, both endogenous and exogenous, sources may induce DNA damage and DNA replication stress. Cells have developed DNA damage response (DDR) signaling pathways to maintain genomic stability and effectively detect and repair DNA lesions. Serine/ threonine kinases such as Ataxia-telangiectasia mutated (ATM) and Ataxia-telangiectasia and Rad3-Related (ATR) are the major regulators of DDR, since after sensing stalled DNA replication forks, DNA double- or single-strand breaks, may directly phosphorylate and activate their downstream targets, that play a key role in DNA repair, cell cycle arrest and apoptotic cell death. Interestingly, key components of DDR signaling networks may constitute an attractive target for anti-cancer therapy through two distinct potential approaches: as chemoand radiosensitizers to enhance the effectiveness of currently used genotoxic treatment or as single agents to exploit defects in DDR in cancer cells via synthetic lethal approach. Moreover, the newest data reported that serine/threonine protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK) is also closely associated with cancer development and progression. Thereby, utilization of small-molecule, serine/threonine kinase inhibitors may provide a novel, groundbreaking, anti-cancer treatment strategy. Currently, a range of potent, highlyselective toward ATM, ATR and PERK inhibitors has been discovered, but after foregoing study, additional investigations are necessary for their future clinical use.

scholarly journals Multifunctional Role of ATM/Tel1 Kinase in Genome Stability: From the DNA Damage Response to Telomere Maintenance

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Enea Gino Di Domenico ◽  
Elena Romano ◽  
Paola Del Porto ◽  
Fiorentina Ascenzioni
Keyword(s):  
Dna Damage ◽  
Dna Damage Response ◽  
Ataxia Telangiectasia ◽  
Genome Stability ◽  
Genetic Disorder ◽  
Cell Cycle Control ◽  
Premature Aging ◽  
Telomere Maintenance ◽  
Damage Response

The mammalian protein kinase ataxia telangiectasia mutated (ATM) is a key regulator of the DNA double-strand-break response and belongs to the evolutionary conserved phosphatidylinositol-3-kinase-related protein kinases. ATM deficiency causes ataxia telangiectasia (AT), a genetic disorder that is characterized by premature aging, cerebellar neuropathy, immunodeficiency, and predisposition to cancer. AT cells show defects in the DNA damage-response pathway, cell-cycle control, and telomere maintenance and length regulation. Likewise, inSaccharomyces cerevisiae, haploid strains defective in theTEL1gene, the ATM ortholog, show chromosomal aberrations and short telomeres. In this review, we outline the complex role of ATM/Tel1 in maintaining genomic stability through its control of numerous aspects of cellular survival. In particular, we describe how ATM/Tel1 participates in the signal transduction pathways elicited by DNA damage and in telomere homeostasis and its importance as a barrier to cancer development.

scholarly journals Phosphorylation of SMURF2 by ATM exerts a negative feedback control of DNA damage response

2020 ◽  
Vol 295 (52) ◽  
pp. 18485-18493
Author(s):  
Liu-Ya Tang ◽  
Adam Thomas ◽  
Ming Zhou ◽  
Ying E. Zhang
Keyword(s):  
Dna Damage ◽  
Dna Damage Response ◽  
Negative Feedback ◽  
Ataxia Telangiectasia ◽  
Ring Finger ◽  
Dna Double Strand Breaks ◽  
Ataxia Telangiectasia Mutated ◽  
Serine Threonine Kinase ◽  
Etoposide Treatment ◽  
Damage Response

Timely repair of DNA double-strand breaks (DSBs) is essential to maintaining genomic integrity and preventing illnesses induced by genetic abnormalities. We previously demonstrated that the E3 ubiquitin ligase SMURF2 plays a critical tumor suppressing role via its interaction with RNF20 (ring finger protein 20) in shaping chromatin landscape and preserving genomic stability. However, the mechanism that mobilizes SMURF2 in response to DNA damage remains unclear. Using biochemical approaches and MS analysis, we show that upon the onset of the DNA-damage response, SMURF2 becomes phosphorylated at Ser384 by ataxia telangiectasia mutated (ATM) serine/threonine kinase, and this phosphorylation is required for its interaction with RNF20. We demonstrate that a SMURF2 mutant with an S384A substitution has reduced capacity to ubiquitinate RNF20 while promoting Smad3 ubiquitination unabatedly. More importantly, mouse embryonic fibroblasts expressing the SMURF2 S384A mutant show a weakened ability to sustain the DSB response compared with those expressing WT SMURF2 following etoposide treatment. These data indicate that SMURF2-mediated RNF20 ubiquitination and degradation controlled by ataxia telangiectasia mutated–induced phosphorylation at Ser384 constitutes a negative feedback loop that regulates DSB repair.

2118-P: Regulation of Ataxia-Telangiectasia and Rad3-Related (ATR)–Dependent DNA Damage Response by Nitric Oxide in ß-Cells

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 2118-P
Author(s):  
CHAY TENG YEO ◽  
BRYNDON OLESON ◽  
JOHN A. CORBETT ◽  
JAMIE K. SCHNUCK
Keyword(s):  
Nitric Oxide ◽  
Dna Damage ◽  
Dna Damage Response ◽  
Ataxia Telangiectasia ◽  
Damage Response

scholarly journals Nuclear Gene 33/Mig6 regulates the DNA damage response through an ATM serine/threonine kinase–dependent mechanism

2017 ◽  
Vol 292 (40) ◽  
pp. 16746-16759 ◽  
Author(s):  
Cen Li ◽  
Soyoung Park ◽  
Xiaowen Zhang ◽  
Leonard M. Eisenberg ◽  
Hong Zhao ◽  
...  
Keyword(s):  
Dna Damage ◽  
Dna Damage Response ◽  
Nuclear Gene ◽  
Serine Threonine Kinase ◽  
Threonine Kinase ◽  
Damage Response ◽  
Dependent Mechanism

scholarly journals DNA-PKcs promotes chromatin decondensation to facilitate initiation of the DNA damage response

2019 ◽  
Vol 47 (18) ◽  
pp. 9467-9479 ◽  
Author(s):  
Huiming Lu ◽  
Janapriya Saha ◽  
Pauline J Beckmann ◽  
Eric A Hendrickson ◽  
Anthony J Davis
Keyword(s):  
Dna Damage ◽  
Dna Damage Response ◽  
Ataxia Telangiectasia ◽  
Cellular Response ◽  
Kinase Activity ◽  
Human Cell Line ◽  
Cell Cycle Checkpoint ◽  
Chromatin Decondensation ◽  
Damage Site ◽  
Damage Response

Abstract The DNA damage response (DDR) encompasses the cellular response to DNA double-stranded breaks (DSBs), and includes recognition of the DSB, recruitment of numerous factors to the DNA damage site, initiation of signaling cascades, chromatin remodeling, cell-cycle checkpoint activation, and repair of the DSB. Key drivers of the DDR are multiple members of the phosphatidylinositol 3-kinase-related kinase family, including ataxia telangiectasia mutated (ATM), ataxia telangiectasia and Rad3-related (ATR), and the DNA-dependent protein kinase catalytic subunit (DNA-PKcs). ATM and ATR modulate multiple portions of the DDR, but DNA-PKcs is believed to primarily function in the DSB repair pathway, non-homologous end joining. Utilizing a human cell line in which the kinase domain of DNA-PKcs is inactivated, we show here that DNA-PKcs kinase activity is required for the cellular response to DSBs immediately after their induction. Specifically, DNA-PKcs kinase activity initiates phosphorylation of the chromatin factors H2AX and KAP1 following ionizing radiation exposure and drives local chromatin decondensation near the DSB site. Furthermore, loss of DNA-PKcs kinase activity results in a marked decrease in the recruitment of numerous members of the DDR machinery to DSBs. Collectively, these results provide clear evidence that DNA-PKcs activity is pivotal for the initiation of the DDR.

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