Date published: 2026-4-1

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KDEL receptor Activators

KDEL receptor activators are defined in this context as a group of chemical compounds that indirectly influence the activity of the KDEL receptor through modulation of endoplasmic reticulum stress and protein folding processes. These compounds do not directly interact with the KDEL receptor but create conditions that necessitate the upregulation of KDEL receptor activity as a compensatory cellular response. The mechanisms of action of these activators are diverse, but they converge on the common pathway of inducing or modulating ER stress, thereby impacting KDEL receptor function. Compounds such as Tunicamycin and Thapsigargin work by disrupting normal ER functions, such as glycosylation and calcium homeostasis, respectively, leading to ER stress which in turn enhances KDEL receptor activity as part of the unfolded protein response (UPR). Similarly, Brefeldin A and Dithiothreitol (DTT) cause protein accumulation or misfolding in the ER, prompting a cellular response that includes the upregulation of the KDEL receptor.

The class of KDEL receptor activators also includes compounds like Auranofin and Chloroquine, which indirectly influence ER function and protein quality control, leading to increased KDEL receptor activity. In addition, proteasome inhibitors like MG132 contribute to protein accumulation in the ER, thereby necessitating enhanced KDEL receptor function. Chemical chaperones such as 4-Phenylbutyric acid and Sodium 4-phenylbutyrate play a role in alleviating ER stress, which can indirectly modulate KDEL receptor activity. Salubrinal and Geldanamycin further exemplify the diverse mechanisms by which these activators function, either by enhancing the ER stress response or by disrupting protein folding, respectively.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Tunicamycin

11089-65-9sc-3506A
sc-3506
5 mg
10 mg
$172.00
$305.00
66
(3)

Tunicamycin inhibits N-linked glycosylation, leading to ER stress. This can upregulate KDEL receptor activity as part of the cellular response to mitigate the effects of ER stress and maintain protein homeostasis.

Brefeldin A

20350-15-6sc-200861C
sc-200861
sc-200861A
sc-200861B
1 mg
5 mg
25 mg
100 mg
$31.00
$53.00
$124.00
$374.00
25
(3)

Brefeldin A disrupts Golgi-ER transport, leading to accumulation of proteins in the ER. This can indirectly activate the KDEL receptor as part of the cellular response to manage increased protein load in the ER.

Auranofin

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

Auranofin induces oxidative stress, affecting ER function. This can lead to increased KDEL receptor activity as the cell responds to altered ER conditions and the need for enhanced protein quality control.

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)

MG132, a proteasome inhibitor, leads to protein accumulation and ER stress. The resultant cellular response can involve upregulation of the KDEL receptor to manage increased protein load in the ER.

4-Phenylbutyric acid

1821-12-1sc-232961
sc-232961A
sc-232961B
25 g
100 g
500 g
$53.00
$136.00
$418.00
10
(1)

4-Phenylbutyric acid acts as a chemical chaperone, alleviating ER stress. Its use can indirectly enhance KDEL receptor activity by modulating the ER stress response and improving protein folding efficiency.

Salubrinal

405060-95-9sc-202332
sc-202332A
1 mg
5 mg
$34.00
$104.00
87
(2)

Salubrinal, a selective inhibitor of eIF2α dephosphorylation, enhances the ER stress response. This can lead to increased KDEL receptor activity as the cell copes with heightened ER stress.

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 impacts multiple cellular pathways, including those related to ER stress. Its broad effects can indirectly influence KDEL receptor activity by altering the cellular response to ER stress.

Sodium phenylbutyrate

1716-12-7sc-200652
sc-200652A
sc-200652B
sc-200652C
sc-200652D
1 g
10 g
100 g
1 kg
10 kg
$77.00
$166.00
$622.00
$5004.00
$32783.00
43
(1)

Sodium 4-phenylbutyrate, similar to its acid form, acts as a chemical chaperone, potentially increasing KDEL receptor activity through its effects on the ER stress response and protein folding.

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, an Hsp90 inhibitor, can induce ER stress by disrupting protein folding, potentially enhancing KDEL receptor activity as the cell responds to increased misfolded proteins in the ER.