Date published: 2026-1-11

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p300 Activators

p300 activators are molecules that target and enhance the activity of the p300 protein, a transcriptional coactivator that possesses intrinsic histone acetyltransferase (HAT) activity. As an epigenetic regulator, p300 plays a significant role in remodeling chromatin structure by acetylating lysine residues on histone proteins, a modification that is associated with transcriptional activation. The acetylation of histones by p300 reduces their affinity for DNA, leading to a more relaxed chromatin structure that facilitates the binding of transcription factors and the transcriptional machinery. Furthermore, p300 is not limited to histones; it can also acetylate a wide range of non-histone proteins involved in various cellular processes, influencing their stability, localization, and activity. The function of p300 is crucial for the regulation of gene expression, cell growth, differentiation, and apoptosis. p300 activators, by augmenting the HAT activity of p300, can influence the expression of genes under its regulatory domain. The chemical structures of p300 activators are diverse, encompassing small molecules, peptides, and natural compounds. These activators can enhance p300 activity through several mechanisms. Some may bind directly to the catalytic domain of p300, stabilizing the enzyme in an active conformation or increasing its affinity for substrate proteins and acetyl-CoA, the donor molecule for the acetyl group. Others may act indirectly by interfering with negative regulators of p300 or by modulating signaling pathways that lead to the phosphorylation of p300, which can increase its HAT activity. The precise molecular interactions between p300 activators and their target are essential for their function and can vary widely depending on the activator's structure.

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Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

CTPB

586976-24-1sc-202558
sc-202558A
1 mg
5 mg
$59.00
$165.00
4
(1)

CTPB functions as a selective p300 inhibitor, exhibiting unique interactions with the acetyltransferase domain. Its structural conformation allows for precise binding, disrupting the enzyme's catalytic activity. This inhibition alters histone acetylation patterns, influencing gene expression regulation. The compound's kinetic profile reveals a rapid association and dissociation with p300, underscoring its potential to modulate transcriptional dynamics in cellular environments.

C646

328968-36-1sc-364452
sc-364452A
10 mg
50 mg
$265.00
$944.00
5
(1)

C646 is a competitive inhibitor of p300 that binds to its acetyl-CoA binding site. Although primarily known as an inhibitor, it might indirectly activate p300 by preventing it from binding to molecules that inhibit its function.

Anacardic Acid

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

Anacardic Acid is found in the shell of the cashew nut. It has been shown to stimulate p300, which in turn enhances histone acetylation. Histone acetylation is a process that opens up the chromatin structure, enhancing gene transcription.

Curcumin

458-37-7sc-200509
sc-200509A
sc-200509B
sc-200509C
sc-200509D
sc-200509F
sc-200509E
1 g
5 g
25 g
100 g
250 g
1 kg
2.5 kg
$37.00
$69.00
$109.00
$218.00
$239.00
$879.00
$1968.00
47
(1)

Curcumin is the active component of turmeric. It has been demonstrated to increase the activity of p300/CBP, which can lead to increased histone acetylation and gene transcription.

Brassinolide

72962-43-7sc-391736
sc-391736A
2 mg
10 mg
$106.00
$339.00
2
(1)

Brassinolide is a plant steroid that has been shown to enhance the expression and function of p300, thereby enhancing histone acetylation and gene transcription.

Resveratrol

501-36-0sc-200808
sc-200808A
sc-200808B
100 mg
500 mg
5 g
$80.00
$220.00
$460.00
64
(2)

Resveratrol is a polyphenolic compound found in various fruits such as grapes and some berries. It has been shown to increase the acetyltransferase activity of p300, which can lead to increased histone acetylation and gene transcription.

(−)Epicatechin

490-46-0sc-205672
sc-205672A
1 mg
5 mg
$51.00
$138.00
(1)

This is a flavonoid, common in cocoa, tea, and some fruits. It has been suggested to enhance p300 activity, though the exact mechanism is not fully understood. It may increase acetylation and subsequent gene transcription.

D,L-Sulforaphane

4478-93-7sc-207495A
sc-207495B
sc-207495C
sc-207495
sc-207495E
sc-207495D
5 mg
10 mg
25 mg
1 g
10 g
250 mg
$153.00
$292.00
$489.00
$1325.00
$8465.00
$933.00
22
(1)

This compound is found in cruciferous vegetables such as broccoli. It has been demonstrated to increase the activity of p300, which can lead to increased histone acetylation and gene transcription.

Lycopene

502-65-8sc-205738
sc-205738A
sc-205738B
1 mg
5 mg
1 g
$146.00
$582.00
$6248.00
4
(1)

Lycopene is a carotenoid found in tomatoes. It has been suggested to enhance the activity of p300, possibly increasing histone acetylation and gene transcription.

Quercetin

117-39-5sc-206089
sc-206089A
sc-206089E
sc-206089C
sc-206089D
sc-206089B
100 mg
500 mg
100 g
250 g
1 kg
25 g
$11.00
$17.00
$110.00
$250.00
$936.00
$50.00
33
(2)

This flavonoid, found in many fruits and vegetables, has been suggested to enhance p300 activity, potentially increasing histone acetylation and gene transcription.