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Mengel, A. ; Ageeva-Kieferle, A. ; Georgii, E. ; Bernhardt, J.* ; Wu, K.M.* ; Durner, J. ; Lindermayr, C.

Nitric oxide modulates histone acetylation at stress genes by inhibition of histone deacetylases.

Plant Physiol. 173, 1434-1452 (2017)
Verlagsversion Forschungsdaten DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Histone acetylation, which is an important mechanism to regulate gene expression, is controlled by the opposing action of histone acetyltransferases and histone deacetylases (HDACs). In animals, several HDACs are subjected to regulation by nitric oxide (NO); in plants, however, it is unknown whether NO affects histone acetylation. We found that treatment with the physiological NO donor S-nitrosoglutathione (GSNO) increased the abundance of several histone acetylation marks in Arabidopsis (Arabidopsis thaliana), which was strongly diminished in the presence of the NO scavenger 2-4-carboxyphenyl- 4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide. This increase was likely triggered by NO-dependent inhibition of HDAC activity, since GSNO and S-nitroso-N-acetyl-DL-penicillamine significantly and reversibly reduced total HDAC activity in vitro (in nuclear extracts) and in vivo (in protoplasts). Next, genome-wide H3K9/14ac profiles in Arabidopsis seedlings were generated by chromatin immunoprecipitation sequencing, and changes induced by GSNO, GSNO/2-4-carboxyphenyl- 4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide or trichostatin A (an HDAC inhibitor) were quantified, thereby identifying genes that display putative NO-regulated histone acetylation. Functional classification of these genes revealed that many of them are involved in the plant defense response and the abiotic stress response. Furthermore, salicylic acid, which is the major plant defense hormone against biotrophic pathogens, inhibited HDAC activity and increased histone acetylation by inducing endogenous NO production. These data suggest that NO affects histone acetylation by targeting and inhibiting HDAC complexes, resulting in the hyperacetylation of specific genes. This mechanism might operate in the plant stress response by facilitating the stress-induced transcription of genes.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Plant-disease Resistance; Protein S-nitrosylation; Programmed Cell-death; Arabidopsis-thaliana; Salicylic-acid; Proteomic Identification; Responsive Genes; Site-specificity; Drought Stress; Heat-stress
ISSN (print) / ISBN 0032-0889
e-ISSN 1532-2548
Zeitschrift Plant Physiology
Quellenangaben Band: 173, Heft: 2, Seiten: 1434-1452 Artikelnummer: , Supplement: ,
Verlag American Society of Plant Biologists (ASPB)
Verlagsort Rockville
Begutachtungsstatus Peer reviewed