Date published: 2026-5-16

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Sir1 Inhibitors

Sir1 Inhibitors are a class of chemicals that can inhibit the function of Sir1, a protein involved in gene silencing and chromatin organization in yeast. Several chemicals can indirectly inhibit Sir1 by targeting related signaling pathways or cellular processes. Histone deacetylase inhibitors, such as Trichostatin A, can inhibit the activity of histone deacetylases (HDACs). By preventing the removal of acetyl groups from histones, these inhibitors disrupt the recruitment of Sir1 to chromatin, thereby inhibiting its gene silencing function. DNA methyltransferase inhibitors, like 5-Aza-2'-Deoxycytidine, can inhibit DNA methyltransferases (DNMTs). By preventing DNA methylation, these inhibitors interfere with the recruitment or stability of Sir1 at silent chromatin domains, indirectly inhibiting its gene silencing activity. Protein kinase inhibitors, including Staurosporine, target kinases involved in signaling pathways that regulate Sir1 function. By blocking these kinases, these inhibitors disrupt phosphorylation events necessary for Sir1's localization or interaction with other proteins, leading to the inhibition of its gene silencing activity.

Histone methylation inhibitors, such as BIX-01294, selectively inhibit histone methyltransferase G9a. By inhibiting G9a, these inhibitors prevent the methylation of histone H3 lysine 9 (H3K9), which is associated with gene silencing. Disruption of H3K9 methylation can potentially affect the recruitment or stability of Sir1 at silent chromatin domains, indirectly inhibiting its function. Other chemicals, like Geldanamycin, Rapamycin, 3-Deazaneplanocin, SP600125, Curcumin, Resveratrol, PD 98059, and Wortmannin, target various proteins and pathways involved in Sir1 signaling. These inhibitors can disrupt downstream signaling events, alter the methylation status of chromatin, or modulate the activity of transcription factors, ultimately leading to the inhibition of Sir1's gene silencing function. In conclusion, Sir1 inhibitors encompass a range of chemicals that can indirectly inhibit the function of Sir1 by targeting related signaling pathways or cellular processes. These inhibitors disrupt the recruitment, stability, or activity of Sir1, ultimately inhibiting its gene silencing function in yeast.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

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 is a nucleoside analog that inhibits DNA methyltransferases (DNMTs). By preventing DNA methylation, it interferes with the recruitment or stability of Sir1 at silent chromatin domains, indirectly inhibiting its gene silencing function.

Staurosporine

62996-74-1sc-3510
sc-3510A
sc-3510B
100 µg
1 mg
5 mg
$82.00
$153.00
$396.00
113
(4)

Staurosporine is a broad-spectrum protein kinase inhibitor. It blocks the activity of kinases involved in signaling pathways that regulate Sir1 function. By disrupting phosphorylation events necessary for Sir1's localization or interaction with other proteins, it inhibits its gene silencing activity.

Histone Lysine Methyltransferase Inhibitor Inhibitor

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

BIX-01294 is a selective inhibitor of histone methyltransferase G9a. By inhibiting G9a, it prevents the methylation of histone H3 lysine 9 (H3K9), which is associated with gene silencing. Disruption of H3K9 methylation can potentially affect the recruitment or stability of Sir1 at silent chromatin domains, indirectly inhibiting its function.

Geldanamycin

30562-34-6sc-200617B
sc-200617C
sc-200617
sc-200617A
100 µg
500 µg
1 mg
5 mg
$39.00
$59.00
$104.00
$206.00
8
(1)

Geldanamycin is an inhibitor of heat shock protein 90 (Hsp90). By targeting Hsp90, it can disrupt the stability and function of proteins involved in Sir1 signaling pathways, leading to inhibition of Sir1's gene silencing activity.

Rapamycin

53123-88-9sc-3504
sc-3504A
sc-3504B
1 mg
5 mg
25 mg
$63.00
$158.00
$326.00
233
(4)

Rapamycin is an inhibitor of the mammalian target of rapamycin (mTOR) pathway. By inhibiting mTOR, it can disrupt downstream signaling events that regulate Sir1 function, indirectly inhibiting its gene silencing activity.

SP600125

129-56-6sc-200635
sc-200635A
10 mg
50 mg
$40.00
$150.00
257
(3)

SP600125 is a potent inhibitor of c-Jun N-terminal kinase (JNK). By inhibiting JNK, it can disrupt signaling pathways that regulate Sir1 function, leading to inhibition of its gene silencing activity.

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 a natural compound with anti-inflammatory properties. It can inhibit the activation of NF-κB, a transcription factor involved in Sir1 signaling pathways. By blocking NF-κB activation, curcumin can indirectly inhibit Sir1's gene silencing function.

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 natural compound found in grapes and red wine. It can activate sirtuins, a class of proteins involved in Sir1 signaling pathways. By modulating sirtuin activity, resveratrol can potentially affect the function of Sir1 in gene silencing.

PD 98059

167869-21-8sc-3532
sc-3532A
1 mg
5 mg
$40.00
$92.00
212
(2)

PD 98059 is a selective inhibitor of mitogen-activated protein kinase kinase (MEK). By inhibiting MEK, it can disrupt downstream signaling events that regulate Sir1 function, indirectly inhibiting its gene silencing activity.

Wortmannin

19545-26-7sc-3505
sc-3505A
sc-3505B
1 mg
5 mg
20 mg
$67.00
$223.00
$425.00
97
(3)

Wortmannin is a potent inhibitor of phosphatidylinositol 3-kinase (PI3K).