RT Journal Article
SR Electronic
T1 Histone demethylation and c-MYC activation enhance translational capacity in response to amino acid restriction
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 154419
DO 10.1101/154419
A1 Chen Cheng
A1 Trent Su
A1 Marco Morselli
A1 Siavash K. Kurdistani
YR 2017
UL http://biorxiv.org/content/early/2017/06/23/154419.1.abstract
AB Nutrient limitation may elicit adaptive epigenetic changes but the nature and mechanisms of the cellular response to specific nutrient deficiencies are incompletely understood. We report that depriving human cells of amino acids (AAs) induces specific loss of H4K20me1 from gene bodies and elevated binding of c-MYC at promoters genome-wide. These effects are most pronounced at ribosomal protein and translation initiation genes, which are upregulated, leading to enhanced protein synthetic capacity. Combination of H4K20 methyltransferase depletion and c-MYC over-expression in rich media is required and sufficient to recapitulate the effects of AA restriction. Our data reveal an unexpected and epigenetically implemented increase in translational capacity when AAs are limiting, likely to safeguard the proteome by making effective use of limited resources.One Sentence Summary: Combination of H4K20me1 demethylation and c-MYC activation enhance translational capacity in response to amino acid restriction.