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ATM and ATR substrate analysis reveals extensive protein networks responsive to DNA damage

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TLDR
A large-scale proteomic analysis of proteins phosphorylated in response to DNA damage on consensus sites recognized by ATM and ATR is performed and more than 900 regulated phosphorylation sites encompassing over 700 proteins are identified.
Abstract
Cellular responses to DNA damage are mediated by a number of protein kinases, including ATM (ataxia telangiectasia mutated) and ATR (ATM and Rad3-related). The outlines of the signal transduction portion of this pathway are known, but little is known about the physiological scope of the DNA damage response (DDR). We performed a large-scale proteomic analysis of proteins phosphorylated in response to DNA damage on consensus sites recognized by ATM and ATR and identified more than 900 regulated phosphorylation sites encompassing over 700 proteins. Functional analysis of a subset of this data set indicated that this list is highly enriched for proteins involved in the DDR. This set of proteins is highly interconnected, and we identified a large number of protein modules and networks not previously linked to the DDR. This database paints a much broader landscape for the DDR than was previously appreciated and opens new avenues of investigation into the responses to DNA damage in mammals.

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N-Myc promotes therapeutic resistance development of neuroendocrine prostate cancer by differentially regulating miR-421/ATM pathway

TL;DR: Surprisingly, N-Myc overexpression upregulated ATM expression in C4–2 cells and this upregulation promoted migration and invasion of prostate cancer cells and N- myc differentially regulating miR-421/ATM pathway contributes to ADT resistance and Enzalutamide resistance development respectively.
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DNA-damage-induced nuclear export of precursor microRNAs is regulated by the ATM-AKT pathway

TL;DR: It is shown that nuclear export of pre-miRNAs is accelerated after DNA damage in an ATM-dependent manner, defining an important role of DNA-damage signaling in miRNA transport and maturation.
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The ZFHX3 (ATBF1) transcription factor induces PDGFRB, which activates ATM in the cytoplasm to protect cerebellar neurons from oxidative stress.

TL;DR: A novel signaling pathway that links ATM via cAMP-responsive-element-binding protein (CREB) to the transcription factor ZFHX3 (also known as ATBF1), which in turn promotes survival of neurons by inducing expression of platelet-derived growth factor receptor β (PDGFRB) is reported.
Journal ArticleDOI

Phosphorylation of the Cryptochrome 1 C-terminal Tail Regulates Circadian Period Length *

TL;DR: Phosphorylation of CRY1 on Ser-588 increases its half-life and lengthens the circadian period and is found to be robustly rhythmic in mouse liver nuclei and contributes to the proper circadian period length.
Journal ArticleDOI

Talking to chromatin: post-translational modulation of polycomb group function

TL;DR: Current insights in covalent modification of Polycomb Group proteins in the context of protein function are reviewed and a tentative view of integrated signaling to chromatin in thecontext of phosphorylation is presented.
References
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Journal ArticleDOI

The DNA damage response: putting checkpoints in perspective

TL;DR: The inability to repair DNA damage properly in mammals leads to various disorders and enhanced rates of tumour development, and this work has shown that direct activation of DNA repair networks is needed to correct this problem.
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Cell-cycle checkpoints and cancer

TL;DR: All life on earth must cope with constant exposure to DNA-damaging agents such as the Sun's radiation, and how cells respond to DNA damage are critical determinants of whether that individual will develop cancer.
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DNA damage-induced activation of p53 by the checkpoint kinase Chk2.

TL;DR: Chk2 directly phosphorylated p53 on serine 20, which is known to interfere with Mdm2 binding, and provides a mechanism for increased stability of p53 by prevention of ubiquitination in response to DNA damage.
Journal ArticleDOI

Immunoaffinity profiling of tyrosine phosphorylation in cancer cells

TL;DR: Applying this approach to several cell systems, including cancer cell lines, shows it can be used to identify activated protein kinases and their phosphorylated substrates without prior knowledge of the signaling networks that are activated, a first step in profiling normal and oncogenic signaling networks.
Journal Article

Global Analysis of Protein Phosphorylation in Yeast

TL;DR: The in vitro substrates recognized by most yeast protein kinases are described, with the use of proteome chip technology, and these results will provide insights into the mechanisms and roles of protein phosphorylation in many eukaryotes.
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