h3 acetylation

BRD73954 是一种有效且特异性的 HDAC 抑制剂，对 HDAC6 和 HDAC8 的 IC50 分别为 36 nM 和 120 nM。

Crebinostat 是一种有效的组蛋白去乙酰化酶 (HDAC) 抑制剂，对 HDAC1、HDAC2、HDAC3 和 HDAC6 有抑制作用， IC50 分别为 0.7 nM、1.0 nM、2.0 nM 和 9.3 nM。Crebinostat 可增加在体外神经元的突触蛋白 1 斑点沿树突 (synapsin-1 punctae along dendrites) 的密度。Crebinostat 可调节染色质介导的神经可塑性，增强小鼠的记忆。Crebinostat 可诱导组蛋白 H3 和组蛋白 H4 乙酰化，并增强 cAMP 反应元件结合蛋白 (CREB) 靶基因 Egr1 的表达。

HDAC-IN-7 是 Tucidinostat (Chidamide) 的类似物，是一种 HDAC 抑制剂。HDAC-IN-7 通过抑制组蛋白 H3 的乙酰化作用，诱导人类结肠癌细胞系的凋亡[1]。

Histone H3 (21-44)-GK-biotin is a peptide fragment of histone H3 that corresponds to amino acid residues 22-45 of the human histone H3.1 and 3.2 sequences and is biotinylated via a C-terminal GK linker. Histone H3 (21-44) contains a lysine residue at position 23 that is subject to acetylation, an arginine at position 26 subject to methylation, and a serine at position 28 subject to phosphorylation, as well as lysine residues at positions 27 and 36 that are subject to methylation and acetylation. Histone H3 (21-44)-GK-biotin has been used as a substrate for the primate-specific histone methyltransferase PR domain-containing protein 7 (PRDM7) to determine substrate specificity.

Histone H3 (21-44)-GK-biotin is a peptide fragment of histone H3 that corresponds to amino acid residues 22-45 of the human histone H3.3 sequence and is biotinylated via a C-terminal GK linker. Unlike histone H3.1 and H3.2, the histone H3.3 variant contains a serine residue at position 31 that is phosphorylated during late prometaphase and metaphase of mitosis. Histone H3 (21-44) also contains lysine residues at positions 23, 27, and 36 that are subject to methylation and acetylation, all of which have a role in the regulation of gene expression, and a serine residue at position 28 that is subject to phosphorylation during mitosis.

Histone H3 (23-34) is a peptide consisting of amino acid residues 23 to 34 of the histone H3 protein. This peptide specifically includes lysine residues at positions 23 and 27, which can undergo methylation and acetylation modifications.

HDAC1-IN-5, a potent inhibitor of HDAC1 with an IC50 value of 15 nM, also exhibits inhibitory activity towards HDAC6 with an IC50 value of 20 nM. In cancer cells, HDAC1-IN-5 enhances the acetylation of both histone H3 and α-tubulin, leading to the activation of caspase 3 and induction of apoptosis. Additionally, HDAC1-IN-5 binds with DNA, causing chromatin damage. Furthermore, it demonstrated strong inhibitory activity against tumor growth in xenograft mice. [1]

HDAC3 6-IN-2 (化合物 15) 是一种高效的HDAC6和HDAC3抑制剂，IC50值分别为0.368 μM和0.635 μM。此化合物不仅具备抗肿瘤活性，能够诱导癌细胞凋亡，同时通过降低HDAC6和HDAC3水平，与H3乙酰化和α-微管蛋白的上调有关。

CPTH6, a thiazole derivative, selectively inhibits the lysine acetyltransferase activity of Gcn5 and pCAF without affecting p300 or CBP. It effectively blocks the acetylation of H3/H4 histones and α-tubulin in various leukemia cell lines, leading to reduced cell viability by arresting the cell cycle in the G0/G1 phase and inducing apoptosis. Additionally, CPTH6 disrupts autophagy across several tumor cell lines, primarily by interfering with ATG7-mediated autophagosomal membrane elongation.

PI3K HDAC-IN-3 (36) 作为PI3K和HDAC的双重抑制剂，其IC50对PI3Kα为0.23 nM，对HDAC1为172 nM。在MV4-11细胞中，PI3K HDAC-IN-3 (36) 能够抑制AKT磷酸化并增加H3的乙酰化水平。此外，在MV4-11异种移植模型中，PI3K HDAC-IN-3 (36) 显示了明显的剂量依赖性抗癌活性。