Date published: 2026-4-1

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Histone cluster 1 H3B Activators

Histone cluster 1 H3B Activators are a set of chemical compounds that enhance the functional activity of Histone cluster 1 H3B through various mechanisms related to chromatin modification and transcription regulation. TrichostHistone cluster 1 H3B Activators encompass a collection of chemical entities that facilitate the transcriptional activity of Histone cluster 1 H3B by modulating chromatin dynamics and histone modifications. Trichostatin A, Sodium butyrate, SAHA (Vorinostat), and M344, all function as histone deacetylase inhibitors, thereby increasing acetylation of Histone cluster 1 H3B and other histones. This hyperacetylation leads to a more relaxed chromatin state, enhancing the transcriptional potential where Histone cluster 1 H3B is involved. Moreover, 5-Azacytidine, RG108, and (-)-Epigallocatechin-3-gallate (EGCG) exert their activating effects by inhibiting DNA methylation. The consequent hypomethylation of DNA strands promotes a transcription-friendly environment, which can amplify the role of Histone cluster 1 H3B in gene expression. BIX-01294 and SGC0946, by selectively inhibiting histone methyltransferases targeting H3K9 and DOT1L respectively, diminish repressive methylation marks, indirectly contributing to the activation of Histone cluster 1 H3B-associated genes. These modifications collectively result in an epigenetic landscape that favors transcriptional activation, thereby enhancing the functional role of Histone cluster 1 H3B in regulating gene expression.

In addition to the aforementioned modifiers of histone acetylation and methylation, other compounds like Parthenolide, MS-275 (Entinostat), and PFI-1 contribute to the activation of Histone cluster 1 H3B through distinct yet complementary pathways. Parthenolide's inhibition of NF-κB can relieve repression of certain genes, indirectly augmenting Histone cluster 1 H3B's functional activity by fostering a transcriptionally permissive state. MS-275, similar to other HDAC inhibitors, specifically increases the acetylation levels of histones, including Histone cluster 1 H3B, thereby enhancing transcriptional activation. PFI-1 interrupts the recognition of acetylated lysine residues on histones by BET bromodomains, which may sustain a transcriptionally active state and further elevate the functional activity of Histone cluster 1 H3B. These activators, through a concerted modulation of transcription-related processes, amplify the role of Histone cluster 1 H3B in the dynamic regulation of chromatin structure and gene expression.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Trichostatin A

58880-19-6sc-3511
sc-3511A
sc-3511B
sc-3511C
sc-3511D
1 mg
5 mg
10 mg
25 mg
50 mg
$152.00
$479.00
$632.00
$1223.00
$2132.00
33
(3)

Trichostatin A is a histone deacetylase inhibitor that promotes acetylation of histones, including Histone cluster 1 H3B. Enhanced acetylation of HIST1H3B leads to a more open chromatin state, facilitating increased transcriptional activity.

Sodium Butyrate

156-54-7sc-202341
sc-202341B
sc-202341A
sc-202341C
250 mg
5 g
25 g
500 g
$31.00
$47.00
$84.00
$222.00
19
(3)

Sodium Butyrate acts as a histone deacetylase inhibitor, leading to the accumulation of acetylated Histone cluster 1 H3B. This alteration enhances transcriptional activation associated with acetylated chromatin.

Suberoylanilide Hydroxamic Acid

149647-78-9sc-220139
sc-220139A
100 mg
500 mg
$133.00
$275.00
37
(2)

Vorinostat, or SAHA, inhibits histone deacetylases, leading to hyperacetylation of Histone cluster 1 H3B. This results in a relaxed chromatin structure, allowing for increased transcription of genes associated with HIST1H3B.

(±)-JQ1

1268524-69-1sc-472932
sc-472932A
5 mg
25 mg
$231.00
$863.00
1
(0)

JQ1 is a BET bromodomain inhibitor that prevents BRD4 from binding to acetylated histones, including Histone cluster 1 H3B. This can lead to enhanced transcription from chromatin regions where HIST1H3B is present.

Histone Lysine Methyltransferase Inhibitor Inhibitor

935693-62-2 (free base)sc-202651
5 mg
$151.00
4
(1)

BIX-01294 is a G9a histone methyltransferase inhibitor, which can lead to decreased methylation of H3K9 near the HIST1H3B gene, potentially facilitating the activation of HIST1H3B-associated gene expression.

RG 108

48208-26-0sc-204235
sc-204235A
10 mg
50 mg
$131.00
$515.00
2
(1)

RG108 is a DNA methyltransferase inhibitor. By reducing DNA methylation, it can indirectly lead to the increased expression of genes, including those involving Histone cluster 1 H3B, by promoting a more transcriptionally permissive state.

5-Aza-2′-Deoxycytidine

2353-33-5sc-202424
sc-202424A
sc-202424B
25 mg
100 mg
250 mg
$218.00
$322.00
$426.00
7
(1)

5-Aza-2'-deoxycytidine inhibits DNA methyltransferases, which can result in reduced methylation of DNA and associated histones, including Histone cluster 1 H3B, ultimately leading to enhanced gene expression.

MS-275

209783-80-2sc-279455
sc-279455A
sc-279455B
1 mg
5 mg
25 mg
$24.00
$90.00
$212.00
24
(2)

MS-275 is a selective HDAC inhibitor that increases acetylation levels of histones, such as Histone cluster 1 H3B, leading to an open chromatin structure and enhanced gene transcription.

Anacardic Acid

16611-84-0sc-202463
sc-202463A
5 mg
25 mg
$102.00
$204.00
13
(1)

Anacardic Acid inhibits histone acetyltransferase (HAT) enzymes, which can lead to increased acetylation of Histone cluster 1 H3B when HAT inhibition is selective, enhancing the transcription of associated genes.

I-CBP112

1640282-31-0sc-507494
25 mg
$400.00
(0)

I-CBP112 is a selective CBP/p300 bromodomain inhibitor, which can increase the acetylation levels of Histone cluster 1 H3B by preventing the reading of acetylation marks, promoting an open chromatin state and active transcription.