Date published: 2026-3-26

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KLHL12 Inhibitors

Chemical inhibitors of KLHL12 function through various mechanisms to impede its activity within the cell. Proteasome inhibitors such as Velcade, MG-132, Epoxomicin, Lactacystin, MLN2238, Carfilzomib, Oprozomib, Delanzomib, Marizomib, and ONX 0914 operate on a similar principle. These inhibitors prevent the proteasomal degradation of proteins that are normally ubiquitinated by KLHL12. The accumulation of these substrates within the cell can result in sequestration of KLHL12, as it becomes engaged with these undegraded proteins, thereby inhibiting its ability to ubiquitinate additional substrates. This indirect method of inhibition relies on the concept that the buildup of KLHL12's substrates can lead to a functional bottleneck, where the protein is unable to carry out its normal biological role in tagging proteins for degradation because it is occupied with an excess of previously ubiquitinated proteins that are not being cleared by the proteasome. Other inhibitors affect the ubiquitination process more upstream. For example, Pyr-41 targets the ubiquitin-activating enzyme E1, a pivotal enzyme in the ubiquitination cascade. By inhibiting this enzyme, Pyr-41 effectively blocks the ubiquitination process at its initial step, preventing the activation of ubiquitin itself. This action means that KLHL12 cannot fulfill its role in transferring ubiquitin to substrates because the ubiquitin is not activated for conjugation. Auranofin, though not a direct inhibitor of the ubiquitination pathway, can alter the redox environment within the cell. Since protein function, including the ubiquitination process, can be sensitive to redox states, the modulation of this environment by Auranofin can lead to an indirect inhibition of KLHL12's activity. The change in redox state may affect the stability and interaction of proteins, including those involved with KLHL12's pathway, thus interfering with KLHL12's ability to ubiquitinate its substrates effectively.

Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Bortezomib

179324-69-7sc-217785
sc-217785A
2.5 mg
25 mg
$135.00
$1085.00
115
(2)

Velcade (Bortezomib) is a proteasome inhibitor that can functionally inhibit KLHL12 by preventing the degradation of proteins that are negatively regulated by KLHL12-mediated ubiquitination. By inhibiting the proteasome, Velcade may lead to the accumulation of such substrates, which could sequester KLHL12 and limit its ability to further ubiquitinate other substrate proteins.

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

133407-82-6sc-201270
sc-201270A
sc-201270B
5 mg
25 mg
100 mg
$60.00
$265.00
$1000.00
163
(3)

MG-132 is a proteasome inhibitor similar to Velcade. It can inhibit the degradation of proteins targeted by KLHL12, potentially leading to an accumulation of KLHL12 substrates that may sequester KLHL12, thereby inhibiting its function indirectly.

Epoxomicin

134381-21-8sc-201298C
sc-201298
sc-201298A
sc-201298B
50 µg
100 µg
250 µg
500 µg
$137.00
$219.00
$449.00
$506.00
19
(2)

Epoxomicin is a selective proteasome inhibitor. By preventing the proteasomal degradation of proteins ubiquitinated by KLHL12, it can lead to an indirect inhibition of KLHL12 by allowing its substrates to accumulate and possibly sequester the protein.

Lactacystin

133343-34-7sc-3575
sc-3575A
200 µg
1 mg
$188.00
$575.00
60
(2)

Lactacystin is another proteasome inhibitor that can increase the levels of KLHL12 substrates in the cell, which may bind to and sequester KLHL12, indirectly inhibiting its function.

Ixazomib

1072833-77-2sc-489103
sc-489103A
10 mg
50 mg
$311.00
$719.00
(0)

MLN2238, also known as Ixazomib, is a proteasome inhibitor. It can indirectly inhibit KLHL12 by stabilizing its substrates, which could compete with new substrates for binding to KLHL12, thus functionally inhibiting its activity.

Carfilzomib

868540-17-4sc-396755
5 mg
$41.00
(0)

Carfilzomib is a selective proteasome inhibitor, which can lead to the accumulation of KLHL12 substrates, indirectly inhibiting the protein by preventing it from interacting with and ubiquitinating new substrates.

Oprozomib

935888-69-0sc-477447
2.5 mg
$280.00
(0)

Oprozomib is a proteasome inhibitor that can indirectly inhibit KLHL12 by causing the accumulation of proteins that are normally ubiquitinated and degraded by the proteasome, potentially sequestering KLHL12 and inhibiting its ubiquitination function.

Delanzomib, free base

847499-27-8sc-396774
sc-396774A
5 mg
10 mg
$160.00
$300.00
(0)

Delanzomib is a proteasome inhibitor that can lead to the build-up of KLHL12 substrates within the cell, which may indirectly inhibit KLHL12 by sequestering it and preventing it from ubiquitinating other substrate proteins.

ONX 0914

960374-59-8sc-477437
5 mg
$245.00
(0)

ONX 0914, also known as PR-957, is an immunoproteasome inhibitor that can indirectly inhibit KLHL12 by stabilizing its substrates, leading to their accumulation, which could sequester KLHL12 and inhibit its function.

Auranofin

34031-32-8sc-202476
sc-202476A
sc-202476B
25 mg
100 mg
2 g
$153.00
$214.00
$4000.00
39
(2)

Auranofin is an inhibitor of the enzyme thioredoxin reductase. By altering the cellular redox state, it may indirectly affect the function of KLHL12, as redox changes can influence protein interactions and stability, potentially leading to the functional inhibition of KLHL12 by affecting its ability to ubiquitinate substrates.