MEK-1 Activators
MEK-1, a pivotal kinase within the mitogen-activated protein kinase (MAPK) signaling pathway, plays a crucial role in transducing extracellular signals into diverse cellular responses, including proliferation, differentiation, and survival. As a member of the MAP kinase kinase (MAP2K) family, MEK-1 acts as a dual-specificity protein kinase primarily responsible for phosphorylating and activating extracellular signal-regulated kinases 1 and 2 (ERK1/2). Activation of MEK-1 occurs downstream of various upstream signaling cascades initiated by growth factors, cytokines, and environmental stressors, which converge on the small GTPase Ras and ultimately lead to the activation of the Raf-MEK-ERK kinase cascade. Upon stimulation, activated Ras recruits and activates Raf kinases, such as Raf-1, which in turn phosphorylate and activate MEK-1 through sequential phosphorylation events at serine and threonine residues within its activation loop.
Mechanistically, MEK-1 activation involves phosphorylation at two critical sites: Ser218 and Ser222. Phosphorylation of these residues induces a conformational change in MEK-1, promoting its catalytic activity towards downstream substrates, particularly ERK1/2. Additionally, MEK-1 activation is tightly regulated by various positive and negative feedback mechanisms to ensure precise control of MAPK signaling dynamics. For instance, phosphorylation of MEK-1 by activated ERK1/2 leads to feedback inhibition, dampening further activation of the pathway and preventing excessive cellular responses. Furthermore, scaffold proteins and adaptor molecules facilitate the spatial and temporal regulation of MEK-1 activation by bringing together key components of the signaling cascade. Overall, understanding the intricate mechanisms governing MEK-1 activation provides insights into the regulation of MAP kinase signaling and its implications in cellular physiology and pathogenesis.
SEE ALSO...
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Forskolin | 66575-29-9 | sc-3562 sc-3562A sc-3562B sc-3562C sc-3562D | 5 mg 50 mg 1 g 2 g 5 g | $78.00 $153.00 $740.00 $1413.00 $2091.00 | 73 | |
Forskolin activates MEK-1 by directly stimulating adenylyl cyclase, leading to an increase in intracellular cAMP levels. Elevated cAMP levels activate protein kinase A (PKA), which in turn phosphorylates and activates MEK-1, promoting its activation. | ||||||
PMA | 16561-29-8 | sc-3576 sc-3576A sc-3576B sc-3576C sc-3576D | 1 mg 5 mg 10 mg 25 mg 100 mg | $41.00 $132.00 $214.00 $500.00 $948.00 | 119 | |
PMA activates MEK-1 through the activation of protein kinase C (PKC). Upon activation, PKC phosphorylates MEK-1, leading to its activation and subsequent initiation of downstream signaling cascades involved in various cellular processes. | ||||||
Sodium Orthovanadate | 13721-39-6 | sc-3540 sc-3540B sc-3540A | 5 g 10 g 50 g | $49.00 $57.00 $187.00 | 142 | |
Sodium orthovanadate activates MEK-1 by inhibiting protein tyrosine phosphatases (PTPs), which are negative regulators of MEK-1 activation. By inhibiting PTPs, sodium orthovanadate enhances the phosphorylation and activation of MEK-1, thereby promoting its activity. | ||||||
1,9-Dideoxyforskolin | 64657-18-7 | sc-201560 sc-201560A | 1 mg 5 mg | $98.00 $325.00 | 1 | |
1,9-Dideoxyforskolin activates MEK-1 by directly binding to and activating adenylyl cyclase, leading to an increase in intracellular cAMP levels. Elevated cAMP levels then activate protein kinase A (PKA), which phosphorylates and activates MEK-1, facilitating its activation. | ||||||
GM-CSF | 83869-56-1 | sc-280759 | 5 µg | $516.00 | 1 | |
GM-CSF activates MEK-1 by binding to its receptor on the cell surface, leading to the activation of downstream signaling pathways. Activation of the GM-CSF receptor initiates a signaling cascade that ultimately results in the phosphorylation and activation of MEK-1. | ||||||
PGE2 | 363-24-6 | sc-201225 sc-201225C sc-201225A sc-201225B | 1 mg 5 mg 10 mg 50 mg | $57.00 $159.00 $275.00 $678.00 | 37 | |
PGE2 activates MEK-1 through the activation of its cognate receptors, which are coupled to G protein-coupled receptors (GPCRs). Activation of these receptors leads to the activation of intracellular signaling pathways that culminate in the phosphorylation and activation of MEK-1. | ||||||
Angiotensin II, Human | 4474-91-3 | sc-363643 sc-363643A sc-363643B sc-363643C | 1 mg 5 mg 25 mg 100 mg | $51.00 $100.00 $310.00 $690.00 | 3 | |
Angiotensin II activates MEK-1 by binding to its cognate receptor, angiotensin II receptor type 1 (AT1R), which is a G protein-coupled receptor (GPCR). Activation of AT1R initiates intracellular signaling cascades that ultimately result in the activation of MEK-1 and downstream targets. | ||||||
Ionomycin, free acid | 56092-81-0 | sc-263405 sc-263405A | 1 mg 5 mg | $96.00 $264.00 | 2 | |
Ionomycin activates MEK-1 by inducing calcium influx into cells, leading to the activation of calcium-dependent signaling pathways. Elevated intracellular calcium levels activate protein kinase C (PKC), which phosphorylates and activates MEK-1, thereby promoting its activation. | ||||||
Thrombin from human plasma | 9002-04-4 | sc-471713 | 100 U | $235.00 | ||
Thrombin activates MEK-1 through the activation of protease-activated receptors (PARs), which are G protein-coupled receptors (GPCRs). Activation of PARs leads to the activation of intracellular signaling cascades that ultimately result in the phosphorylation and activation of MEK-1. | ||||||
Bradykinin | 58-82-2 | sc-507311 | 5 mg | $110.00 | ||
Bradykinin activates MEK-1 by binding to its cognate G protein-coupled receptors (GPCRs) on the cell surface. Activation of these receptors initiates intracellular signaling pathways that culminate in the phosphorylation and activation of MEK-1, promoting its functional activation. | ||||||