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@ARTICLE{Paredes:137609,
author = {R. Paredes and M. Schneider and A. Stevens and D. J. White
and A. J. K. Williamson and J. Muter and S. Pearson and J.
R. Kelly and K. Connors and D. H. Wiseman and J. A. Chadwick
and H. Löffler$^*$ and H. Y. Teng and S. Lovell and R.
Unwin and H. J. van de Vrugt and H. Smith and O. Kustikova
and A. Schambach and T. C. P. Somervaille and A. Pierce and
A. D. Whetton and S. Meyer},
title = {{EVI}1 carboxy-terminal phosphorylation is {ATM}-mediated
and sustains transcriptional modulation and self-renewal via
enhanced {C}t{BP}1 association.},
journal = {Nucleic acids symposium series},
volume = {46},
number = {15},
issn = {1362-4962},
address = {Oxford},
publisher = {Oxford Univ. Press44364},
reportid = {DKFZ-2018-01489},
pages = {7662 - 7674},
year = {2018},
abstract = {The transcriptional regulator EVI1 has an essential role in
early hematopoiesis and development. However, aberrantly
high expression of EVI1 has potent oncogenic properties and
confers poor prognosis and chemo-resistance in leukemia and
solid tumors. To investigate to what extent EVI1 function
might be regulated by post-translational modifications we
carried out mass spectrometry- and antibody-based analyses
and uncovered an ATM-mediated double phosphorylation of EVI1
at the carboxy-terminal S858/S860 SQS motif. In the presence
of genotoxic stress EVI1-WT (SQS), but not site mutated
EVI1-AQA was able to maintain transcriptional patterns and
transformation potency, while under standard conditions
carboxy-terminal mutation had no effect. Maintenance of
hematopoietic progenitor cell clonogenic potential was
profoundly impaired with EVI1-AQA compared with EVI1-WT, in
particular in the presence of genotoxic stress. Exploring
mechanistic events underlying these observations, we showed
that after genotoxic stress EVI1-WT, but not EVI1-AQA
increased its level of association with its functionally
essential interaction partner CtBP1, implying a role for ATM
in regulating EVI1 protein interactions via phosphorylation.
This aspect of EVI1 regulation is therapeutically relevant,
as chemotherapy-induced genotoxicity might detrimentally
sustain EVI1 function via stress response mediated
phosphorylation, and ATM-inhibition might be of specific
targeted benefit in EVI1-overexpressing malignancies.},
cin = {G330},
ddc = {540},
cid = {I:(DE-He78)G330-20160331},
pnm = {317 - Translational cancer research (POF3-317)},
pid = {G:(DE-HGF)POF3-317},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29939287},
pmc = {pmc:PMC6125627},
doi = {10.1093/nar/gky536},
url = {https://inrepo02.dkfz.de/record/137609},
}