KT5823 Chemical Properties

Boiling point:

629.2±55.0 °C(Predicted)

Density 

1.52±0.1 g/cm3(Predicted)

storage temp. 

2-8°C

solubility 

ethyl acetate: 5 mg/mL

form 

lyophilized powder

pka

-1.01±0.60(Predicted)

color 

white

Stability:

Stable for 1 year from date of purchase as supplied. Solutions in DMSO or DMF may be stored at -20° for up to 3 months.

Safety Information

Hazard Codes 

Xi

WGK Germany 

3

F 

10

HS Code 

29349990

MSDS

• Language:English Provider:SigmaAldrich

KT5823 Usage And Synthesis

Description

KT5823 (126643-37-6) is a selective protein kinase G inhibitor (K>i =0.23, 4 and >10 μM for PKG, PKC and PKA respectively.1?Arrests human skin fibroblast cell cycle after the G0/G1 boundary.2 KT5823 abolishes the cGMP-induced relaxation in smooth muscle cells (IC50=60 nM).3?Cell permeable.

Chemical Properties

Yellow powder

Uses

KT 5823 is a protein kinase inhibitor shown to increase TSH-induced NIS expression, and thus iodide uptake, in thyroid cells.

Uses

KT 5823 has been used as cyclic guanosine monophosphate (cGMP)-dependent protein kinase (PKG) inhibitor in cortical cultures, cortical neurons and in mouse brain capillary endothelial cells.

Definition

ChEBI: KT 5823 is an organic heterooctacyclic compound that is 1H,1'H-2,2'-biindole in which the nitrogens have undergone formal oxidative coupling to positions 2 and 5 of methyl (3R)-3-methoxy-2-methyltetrahydrofuran-3-carboxylate (the 2S,3R,5R product), and in which the 3 and 3' positions of the biindole moiety have also undergone formal oxidative coupling to positions 3 and 4 of 1-methyl-1,5-dihydro-2H-pyrrol-2-one. It has a role as an EC 2.7.11.12 (cGMP-dependent protein kinase) inhibitor. It is a gamma-lactam, an organic heterooctacyclic compound, a methyl ester, a hemiaminal and an indolocarbazole.

General Description

Highly specific cell-permeable, reversible, and ATP-competitive inhibitor of protein kinase G (K_i = 234 nM). Inhibits protein kinase C (K_i = 4.0 μM) and protein kinase A (K_i >10.0 μM) at higher concentrations.

Biological Activity

Selective inhibitor of protein kinase G (K i values are 0.23, 4 and > 10 μ M for inhibition of PKG, PKC and PKA respectively). Inhibits SNP-stimulated PKG activity with an IC 50 of 60 nM in dispersed smooth muscle cells and has little effect on PKA activity at concentrations of up to 10 μ M. Also available as part of the Mixed Kinase Inhibitor Tocriset™ .

Biochem/physiol Actions

Cell permeable: yes

storage

-20°C (desiccate)

References

1) Kase et al. (1987), K252 compounds, novel and potent inhibitors of protein kinase C and cyclic nucleotide-dependent protein kinases; Biochem. Biophys. Res. Commun., 142 436 2) Gadbois et al. (1992), Multiple kinase arrest points in the G1 phase of nontransformed mammalian cells are absent in transformed cells; Proc. Natl. Acad. Sci. USA, 89 8626 3) Murthy et al. (1995), Interaction of cA-kinase and cG-kinase in mediating relaxation of dispersed smooth muscle cells; Am. J. Physiol., 268 C171

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