STO-609 (acetate) Chemical Properties

Melting point:

>300 °C

storage temp. 

2-8°C

solubility 

Soluble in DMSO (up to 10 mg/ml).

form 

Yellow solid.

color 

Yellow

Stability:

Stable for 2 years from date of purchase as supplied. Solutions in DMSO may be stored at -20°C for up to 3 months.

STO-609 (acetate) Usage And Synthesis

Description

STO-609 (1173022-21-3) is a selective inhibitor of Ca2+-calmodulin-dependent protein kinase kinase (Ki = 80 and 15 ng/ml for inhibition of CaM-KKα and CaM-KKβ respectively).1 Binds to the? ATP-binding site.2 Displays > 80-fold selectivity over CaMK1, CaMK2, CaMK4, MLCK, PKC, PKA and p42 MAPK. Important tool for probing distinct CaMK pathways in LTP.3 Reduces starvation-induced autophagosomal membrane formation.4 Reverses age-associated decline in bone mass.5 Stimulates osteoblast formation, inhibits osteoclast differentiation.6

Uses

STO-609 is a cell-permeable inhibitor of calcium/calmodulin-dependent kinase kinases (CaMKK) isoforms CaMKKα and CaMKKβ. It is used to evaluate the action of CaMKK isoforms both in vitro and in cells.

General Description

STO-609 reduces tumorigenicity of liver cancer cells in vivo. TO-609 reduces the activation of AMP (adenosine monophosphate)-activated protein kinase (AMPK) by ionomycin in a dose dependant manner.

Biochem/physiol Actions

Selective Ca2+/Calmodulin-dependent protein kinase kinase (CaM-KK) antagonist. Inhibits CamKKa and CaMKKb with Ki = 80 and 15 ng/mL, respectively. Does not inhibit downstream CaM kinases (CaMKI and CaMKIV).

storage

Room temperature (desiccate)

References

[1] H. TOKUMITSU. STO-609, a Specific Inhibitor of the Ca2+/Calmodulin-dependent Protein Kinase Kinase*[J]. The Journal of Biological Chemistry, 2002, 46 1: 15813-15818. DOI:10.1074/jbc.m201075200
[2] HIROSHI TOKUMITSU. A single amino acid difference between alpha and beta Ca2+/calmodulin-dependent protein kinase kinase dictates sensitivity to the specific inhibitor, STO-609.[J]. The Journal of Biological Chemistry, 2003, 278 13: 10908-10913. DOI:10.1074/jbc.m213183200
[3] ROGER L REDONDO. Synaptic tagging and capture: differential role of distinct calcium/calmodulin kinases in protein synthesis-dependent long-term potentiation.[J]. Journal of Neuroscience, 2010: 4981-4989. DOI:10.1523/jneurosci.3140-09.2010
[4] SIMON G PFISTERER. Ca2+/calmodulin-dependent kinase (CaMK) signaling via CaMKI and AMP-activated protein kinase contributes to the regulation of WIPI-1 at the onset of autophagy.[J]. Molecular Pharmacology, 2011, 80 6: 1066-1075. DOI:10.1124/mol.111.071761
[5] ZACHARY J. PRITCHARD . Inhibition of CaMKK2 reverses age-associated decline in bone mass[J]. Bone, 2015, 75: Pages 120-127. DOI:10.1016/j.bone.2015.01.021
[6] RACHEL L CARY. Inhibition of Ca2+/Calmodulin–Dependent Protein Kinase Kinase 2 Stimulates Osteoblast Formation and Inhibits Osteoclast Differentiation[J]. Journal of Bone and Mineral Research, 2013, 28 7: 1599-1610. DOI:10.1002/jbmr.1890
[7] TOSHIYA MATSUKAWA. Upregulation of skeletal muscle PGC-1α through the elevation of cyclic AMP levels by Cyanidin-3-glucoside enhances exercise performance.[J]. Scientific Reports, 2017: 44799. DOI:10.1038/srep44799

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