Date published: 2025-10-17

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SR-7 Activators

SR-7 Activators are a specialized suite of chemical compounds that influence various intracellular signaling pathways to indirectly enhance the functional activity of the protein SR-7. Forskolin, by increasing adenylyl cyclase activity, raises intracellular cyclic AMP (cAMP) levels, leading to the activation of protein kinase A (PKA). SR-7 is a substrate of PKA or is regulated by PKA-mediated phosphorylation, this would result in its enhanced activity. Similarly, the direct provision of cAMP or its stable analog dibutyryl cAMP (db-cAMP) also activates PKA, potentially leading to the phosphorylation and subsequent activation of SR-7. Ionomycin, through its action as a calcium ionophore, elevates intracellular calcium concentrations, which may activate calcium-dependent protein kinases, such as calmodulin-dependent kinase (CaMK), that could phosphorylate SR-7. Further contributing to the activity enhancement of SR-7 are compounds that inhibit the dephosphorylation of proteins. Sodium orthovanadate, as a phosphatase inhibitor, could sustain the phosphorylation state of SR-7, while okadaic acid and calyculin A inhibit protein phosphatases PP1 and PP2A, respectively, thereby potentially maintaining SR-7 in an active phosphorylated form. Insulin's engagement with its receptor triggers the PI3K/Akt signaling pathway, which could enhance SR-7 activity. Anisomycin, by activating stress-activated protein kinases such as JNK and p38, might enhance the activity of SR-7. Lastly, S-Nitroso-N-acetylpenicillamine (SNAP) releases nitric oxide, which activates guanylyl cyclase to increase cGMP levels, and may enhance SR-7 activity through protein kinase G (PKG) dependent mechanisms, assuming SR-7 is a target of PKG.

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