SDF-4 Inhibitors
Chemical inhibitors of SDF-4 operate through various mechanisms to inhibit its function within the endoplasmic reticulum (ER). Brefeldin A, for instance, disrupts the function of ARF, a GTPase essential for vesicle transport between the ER and the Golgi apparatus. By impeding this transport, Brefeldin A indirectly inhibits the role of SDF-4 in protein folding by preventing the proper trafficking of proteins that require the folding machinery of SDF-4. Tunicamycin, another chemical inhibitor, targets N-linked glycosylation, a post-translational modification crucial for many proteins that SDF-4 helps to fold. The resulting accumulation of unglycosylated proteins in the ER indirectly inhibits SDF-4 by overwhelming its folding capacity. Similarly, Thapsigargin and Cyclopiazonic Acid hinder the SERCA pump, leading to altered calcium levels within the ER. As SDF-4 is implicated in calcium-dependent protein folding, the disruption of calcium homeostasis indirectly inhibits the functional capacity of SDF-4.
Eeyarestatin I, Ceapin-A7, and Exo1 indirectly inhibit SDF-4 by affecting ER-associated degradation, ATF6α signaling, and exocytosis, respectively. Eeyarestatin I leads to an accumulation of misfolded proteins by inhibiting components of the ERAD pathway, while Ceapin-A7 hampers the unfolded protein response, which could stall the transcriptional upregulation of auxiliary folding proteins that assist SDF-4. Exo1 blocks the Sec7 domain of GBF1, causing a buildup of proteins in the ER, which then indirectly inhibits SDF-4 by saturating its protein folding capacity. Gossypol and Suberoylanilide Hydroxamic Acid (SAHA) induce ER stress by different mechanisms, leading to an environment within the ER that is not conducive to the protein folding role of SDF-4 due to an excess of unfolded or misfolded proteins. Salubrinal and Guanabenz maintain the phosphorylation of eIF2α, resulting in attenuated global protein synthesis. This reduction in the influx of new proteins to the ER indirectly inhibits SDF-4 by reducing its substrate load. Azoramide, while typically enhancing ER folding capabilities, can also lead to an indirect inhibition of SDF-4 by overburdening the protein folding processes within the ER with prolonged exposure to high concentrations of the chemical.
SEE ALSO...
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Brefeldin A | 20350-15-6 | sc-200861C sc-200861 sc-200861A sc-200861B | 1 mg 5 mg 25 mg 100 mg | $31.00 $53.00 $124.00 $374.00 | 25 | |
Brefeldin A inhibits ADP-ribosylation factor (ARF), a small GTPase involved in vesicle budding from the Golgi apparatus. SDF-4 is localized in the endoplasmic reticulum and is involved in protein folding; by disrupting Golgi function, Brefeldin A could inhibit the transport of proteins SDF-4 acts upon. | ||||||
Thapsigargin | 67526-95-8 | sc-24017 sc-24017A | 1 mg 5 mg | $136.00 $446.00 | 114 | |
Thapsigargin is a SERCA pump inhibitor leading to increased cytosolic calcium levels. SDF-4, involved in calcium homeostasis within the endoplasmic reticulum, would have its function compromised due to the perturbation in calcium balance, indirectly inhibiting its protein folding activity by overwhelming its capacity. | ||||||
Tunicamycin | 11089-65-9 | sc-3506A sc-3506 | 5 mg 10 mg | $172.00 $305.00 | 66 | |
Tunicamycin inhibits N-linked glycosylation. As SDF-4 is involved in the protein folding of glycoproteins in the endoplasmic reticulum, inhibition of glycosylation can indirectly inhibit SDF-4 by preventing the formation of glycoproteins that require folding by SDF-4. | ||||||
Cyclopiazonic Acid | 18172-33-3 | sc-201510 sc-201510A | 10 mg 50 mg | $176.00 $624.00 | 3 | |
Cyclopiazonic Acid is another inhibitor of the SERCA pump, like Thapsigargin, leading to depletion of ER calcium stores. This depletion would indirectly inhibit SDF-4's role in managing protein folding within the ER by disrupting the calcium-dependent folding environment it requires. | ||||||
Eeyarestatin I | 412960-54-4 | sc-358130B sc-358130 sc-358130A sc-358130C sc-358130D sc-358130E | 5 mg 10 mg 25 mg 50 mg 100 mg 500 mg | $114.00 $203.00 $354.00 $697.00 $1363.00 $5836.00 | 12 | |
Eeyarestatin I interferes with ER-associated degradation (ERAD) by inhibiting the p97 ATPase and associated deubiquitinating enzymes, which could lead to an accumulation of misfolded proteins in the ER. This accumulation could indirectly inhibit SDF-4's function by overwhelming its protein folding capacity. | ||||||
Exo1 | 461681-88-9 | sc-200752 sc-200752A | 10 mg 50 mg | $84.00 $297.00 | 4 | |
Exo1 inhibits exocytosis by targeting the Sec7 domain of GBF1, a GEF for ARF1. Inhibition of this process could lead to a buildup of proteins within the ER, indirectly inhibiting SDF-4 by causing an overload of substrates for protein folding within the ER. | ||||||
Gossypol | 303-45-7 | sc-200501 sc-200501A | 25 mg 100 mg | $116.00 $230.00 | 12 | |
Gossypol is known to induce ER stress and the unfolded protein response by various mechanisms. The induction of ER stress can lead to an overload of unfolded proteins within the ER, which could indirectly inhibit SDF-4's ability to facilitate proper protein folding due to the excessive demand. | ||||||
Suberoylanilide Hydroxamic Acid | 149647-78-9 | sc-220139 sc-220139A | 100 mg 500 mg | $133.00 $275.00 | 37 | |
SAHA, also known as Vorinostat, is a histone deacetylase inhibitor that leads to increased acetylation of proteins and affects gene expression. It can induce ER stress and affect protein folding pathways, which could indirectly inhibit SDF-4 by altering the folding environment within the ER. | ||||||
Salubrinal | 405060-95-9 | sc-202332 sc-202332A | 1 mg 5 mg | $34.00 $104.00 | 87 | |
Salubrinal selectively blocks dephosphorylation of eIF2α, which is involved in the unfolded protein response. The persistent phosphorylation of eIF2α can lead to reduced global protein synthesis, thereby indirectly inhibiting SDF-4 by reducing the load of new proteins entering the ER for folding. | ||||||
Guanabenz acetate | 23256-50-0 | sc-203590 sc-203590A sc-203590B sc-203590C sc-203590D | 100 mg 500 mg 1 g 10 g 25 g | $102.00 $468.00 $832.00 $4162.00 $7283.00 | 2 | |
Guanabenz is known to modulate stress responses in the ER by affecting the eIF2α pathway similarly to Salubrinal. It can indirectly inhibit SDF-4 by diminishing the quantity of proteins translocated into the ER for folding, thereby reducing the functional demand on SDF-4. | ||||||