Date published: 2025-10-16

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KLHL20 Inhibitors

KLHL20 Inhibitors are a diverse set of chemical compounds that indirectly suppress the functional activity of KLHL20 through various biochemical pathways. Proteasome inhibitors such as MG-132, Bortezomib, Lactacystin, and Epoxomicin function by preventing the degradation of ubiquitinated proteins, leading to the accumulation of KLHL20 substrates within the cell, which effectively diminishes the turnover rate at which KLHL20 can ubiquitinate new substrates. This saturation of substrates hinders the functional capacity of KLHL20 to facilitate proteolysis, thereby indirectly inhibiting its activity. Similarly, MLN 4924, by inhibiting the NEDD8-activating enzyme, impairs the neddylation process that is crucial for the activity of cullin-RING ligases, of which KLHL20 is a component. The disruption of this post-translational modification can lead to a significant decrease in the ubiquitin ligase activity of KLHL20. The influence of autophagy inhibition by Chloroquine, which results in the increase of p62-a KLHL20 substrate-also contributes to the functional inhibition of KLHL20, as does the action of Thalidomide, which can modulate the substrate recognition of cullin-RING E3 ligases. Compounds like Curcumin and All-trans retinoic acid impact the transcriptional levels of KLHL20, with Curcumin inhibiting the NF-κB pathway and potentially reducing KLHL20 expression and All-trans retinoic acid altering gene expression through retinoic acid receptors, which may affect KLHL20 expression or substrate availability. ICI 182,780, by altering the expression of proteins within the ubiquitin-proteasome system, may indirectly lead to the diminution of KLHL20 activity. Lastly, Withaferin A and Celastrol disrupt the proteasomal degradation pathway and heat shock proteins, respectively, which can indirectly impact the ubiquitination process that KLHL20 is part of. By affecting the proteasome-mediated degradation or protein folding and stability within the ubiquitination pathway, these compounds result in an indirect but effective decrease in the enzymatic activity of KLHL20, thus serving as functional inhibitors. Each inhibitor, through its specific mechanism, ensures that the activity of KLHL20 is diminished without directly altering its transcription or translation, but rather by influencing the biochemical pathways and cellular processes that KLHL20 is inherently involved in.

Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

MG-132 [Z-Leu- Leu-Leu-CHO]

133407-82-6sc-201270
sc-201270A
sc-201270B
5 mg
25 mg
100 mg
$56.00
$260.00
$980.00
163
(3)

A proteasome inhibitor that prevents the degradation of ubiquitinated proteins. Since KLHL20 is involved in protein ubiquitination, MG132 indirectly leads to an accumulation of KLHL20 substrates, thus functionally diminishing the apparent activity of KLHL20 by reducing its availability to ubiquitinate additional substrates.

MLN 4924

905579-51-3sc-484814
1 mg
$280.00
1
(0)

A NEDD8-activating enzyme inhibitor that impairs the neddylation process. Neddylation is essential for the activity of cullin-RING ligases (CRLs), to which KLHL20 belongs. Inhibition of neddylation by MLN4924 could lead to a decrease in the ubiquitin ligase activity of KLHL20.

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
$36.00
$68.00
$107.00
$214.00
$234.00
$862.00
$1968.00
47
(1)

A compound that inhibits the NF-κB pathway, which can regulate the expression of multiple genes including KLHL20. By inhibiting this pathway, curcumin could diminish the transcriptional levels of KLHL20, leading to a reduction in its protein levels and thus its activity.

Chloroquine

54-05-7sc-507304
250 mg
$68.00
2
(0)

An autophagy inhibitor that can increase the cellular levels of p62, a selective substrate for autophagic degradation. Since KLHL20 promotes the degradation of p62, inhibition of autophagy by chloroquine could lead to the accumulation of p62 and a subsequent decrease in the degradation activity of KLHL20.

Bortezomib

179324-69-7sc-217785
sc-217785A
2.5 mg
25 mg
$132.00
$1064.00
115
(2)

A proteasome inhibitor similar to MG132, which can diminish the degradation of ubiquitinated proteins. By doing so, bortezomib could indirectly diminish the functional activity of KLHL20 by causing an accumulation of its substrates within the cell.

Thalidomide

50-35-1sc-201445
sc-201445A
100 mg
500 mg
$109.00
$350.00
8
(0)

A cereblon modulator that can affect the activity of cullin-RING E3 ubiquitin ligases. Since KLHL20 is part of this family, thalidomide might affect the ligase activity of KLHL20 by modulating the substrate recognition component of the ligase complex.

Lactacystin

133343-34-7sc-3575
sc-3575A
200 µg
1 mg
$165.00
$575.00
60
(2)

Another proteasome inhibitor that can lead to the accumulation of polyubiquitinated proteins, which is expected to indirectly decrease the catalytic turnover of KLHL20 by rendering its substrates less accessible for ubiquitination and subsequent degradation.

Retinoic Acid, all trans

302-79-4sc-200898
sc-200898A
sc-200898B
sc-200898C
500 mg
5 g
10 g
100 g
$65.00
$319.00
$575.00
$998.00
28
(1)

A compound that influences gene expression through retinoic acid receptors. It can alter the expression of genes involved in the ubiquitination pathway, potentially leading to a decrease in the functional activity of KLHL20 by affecting its expression or the availability of its substrates.

ICI 182,780

129453-61-8sc-203435
sc-203435A
1 mg
10 mg
$81.00
$183.00
34
(1)

An estrogen receptor degrader that can also affect the expression of various proteins including those in the ubiquitin-proteasome system. By altering the expression of these proteins, fulvestrant may indirectly diminish the functional activity of KLHL20.

Epoxomicin

134381-21-8sc-201298C
sc-201298
sc-201298A
sc-201298B
50 µg
100 µg
250 µg
500 µg
$134.00
$215.00
$440.00
$496.00
19
(2)

A selective proteasome inhibitor that could lead to diminished degradation of KLHL20 substrates, thereby indirectly decreasing the activity of KLHL20 by causing a substrate backlog.