Fig. 1. Marked elevation of histone succinylation by inhibition of HDACs but not Sirtuins.
a Dot blot assay showing the specificity of a pan anti-Ksu antibody. Control peptide, unmodified H3 N-terminal 1–21 aa; Ksu peptide, H3 1–21 aa with succinylated K9, K14, and K18; Kac peptide, H3 1–21 aa with acetylated K9, K14, and K18. The amounts of peptides in dot blot were as indicated. b–e WB analyses showing the levels of histone succinylation and acetylation in HeLa cells treated with an increasing dose of TSA for 12 h (b), 1 μM TSA for different periods (c), different inhibitors (d), and different concentrations of the class I HDAC inhibitor MS275 (e). f IF assay showing the different effects of TSA and NAM treatment on cellular succinylation and acetylation levels. HeLa cells were treated with 1 μM TSA or 20 mM NAM for 24 h. Scale bars, 20 μm. g IF staining showing the effect of MS275 treatment on cellular succinylation level. HeLa cells were treated with different concentrations of MS275 for 12 h. Scale bars, 20 μm.