Abstract:
:The histone lysine demethylase KDM4C is often overexpressed in cancers primarily through gene amplification. The molecular mechanisms of KDM4C action in tumorigenesis are not well defined. Here, we report that KDM4C transcriptionally activates amino acid biosynthesis and transport, leading to a significant increase in intracellular amino acid levels. Examination of the serine-glycine synthesis pathway reveals that KDM4C epigenetically activates the pathway genes under steady-state and serine deprivation conditions by removing the repressive histone modification H3 lysine 9 (H3K9) trimethylation. This action of KDM4C requires ATF4, a transcriptional master regulator of amino acid metabolism and stress responses. KDM4C activates ATF4 transcription and interacts with ATF4 to target serine pathway genes for transcriptional activation. We further present evidence for KDM4C in transcriptional coordination of amino acid metabolism and cell proliferation. These findings suggest a molecular mechanism linking KDM4C-mediated H3K9 demethylation and ATF4-mediated transactivation in reprogramming amino acid metabolism for cancer cell proliferation.
journal_name
Cell Repjournal_title
Cell reportsauthors
Zhao E,Ding J,Xia Y,Liu M,Ye B,Choi JH,Yan C,Dong Z,Huang S,Zha Y,Yang L,Cui H,Ding HFdoi
10.1016/j.celrep.2015.12.053subject
Has Abstractpub_date
2016-01-26 00:00:00pages
506-519issue
3issn
2211-1247pii
S2211-1247(15)01494-1journal_volume
14pub_type
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