Pricing Availability   Qty
Description: SERCA ATPase blocker. Also potent BKCa channel blocker
Chemical Name: (2R,4bS,6aS,12bS,12cR,14aS)-5,6,6a,7,12,12b,12c,13,14,14a-Decahydro-4b-hydroxy-2-(1-hydroxy-1-methylethyl)-12b,12c-dimethyl-2H-pyrano[2'',3'':5',6']benz[1',2':6,7]indeno[1,2-b]indol-3(4bH)-one
Purity: ≥98% (HPLC)
Citations (19)
Reviews (1)

Biological Activity for Paxilline

Paxilline is a potent blocker of high-conductance Ca2+-activated K+ (BKCa, KCa1.1) channels. Binds to the α-subunit of BKCa (Ki = 1.9 nM for block of currents in α-subunit-expressing oocytes) and enhances binding of charybdotoxin to BKCa channels in vascular smooth muscle. Also inhibits sarco/endoplasmic reticulum Ca2+-ATPase (IC50 = 5 - 50 μM).

Compound Libraries for Paxilline

Paxilline is also offered as part of the Tocriscreen 2.0 Max. Find out more about compound libraries available from Tocris.

Technical Data for Paxilline

M. Wt 435.56
Formula C27H33NO4
Storage Store at -20°C
Purity ≥98% (HPLC)
CAS Number 57186-25-1
PubChem ID 105008
Smiles [H][C@@]4([C@](C)3[C@]5(C)[C@@](C([C@]6([H])CC5)=CC([C@@H]([C@](O)(C)C)O6)=O)(O)CC4)CC2=C3NC1=CC=CC=C12

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

Tocris products are intended for laboratory research use only, unless stated otherwise.

Solubility Data for Paxilline

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 43.56 100
ethanol 8.71 20

Preparing Stock Solutions for Paxilline

The following data is based on the product molecular weight 435.56. Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.3 mL 11.48 mL 22.96 mL
5 mM 0.46 mL 2.3 mL 4.59 mL
10 mM 0.23 mL 1.15 mL 2.3 mL
50 mM 0.05 mL 0.23 mL 0.46 mL

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

Product Datasheets for Paxilline

Certificate of Analysis / Product Datasheet
Select another batch:

References for Paxilline

References are publications that support the biological activity of the product.

Knaus et al (1994) Tremorgenic indole alkaloids potently inhibit smooth muscle high-conductance calcium-activated potassium channels. Biochemistry 33 5819 PMID: 7514038

Sanchez and McManus (1996) Paxilline inhibition of the alpha-subunit of the high-conductance calcium-activated potassium channel. Neuropharmacology 35 963 PMID: 8938726

Bilmen et al (2002) The mechanism of inhibition of the sarco/endoplasmic reticulum Ca2+ ATPase by paxilline. Arch.Biochem.Biophys. 406 55 PMID: 12234490

If you know of a relevant reference for Paxilline, please let us know.

View Related Products by Product Action

View all Ca2+-ATPase Blockers

Keywords: Paxilline, Paxilline supplier, Potent, blockers, BKCa, channels, SERCA, ATPases, Potassium, ca2+-activated, ca2+-dependent, Ca2+-ATPase, Signaling, Signalling, Calcium, Calcium-ATPase, Ion, Transporters, Pumps, Ca2+-Activated, Channels, 2006, Tocris Bioscience

19 Citations for Paxilline

Citations are publications that use Tocris products. Selected citations for Paxilline include:

Madry et al (2018) Microglial Ramification, Surveillance, and Interleukin-1β Release Are Regulated by the Two-Pore Domain K+ Channel THIK-1. Neuron 97 299 PMID: 29290552

Simkin et al (2015) Aging-Related Hyperexcitability in CA3 Pyramidal Neurons Is Mediated by Enhanced A-Type K+ Channel Function and Expression. J Neurosci 35 13206 PMID: 26400949

Montgomery et al (2013) Mis-expression of the BK K(+) channel disrupts suprachiasmatic nucleus circuit rhythmicity and alters clock-controlled behavior. Am J Physiol Cell Physiol 304 C299 PMID: 23174562

Westcott et al (2012) Function and expression of ryanodine receptors and inositol 1,4,5-trisphosphate receptors in smooth muscle cells of murine feed arteries and arterioles. J Physiol 590 1849 PMID: 22331418

Pulkkinen et al (2012) The bitter taste receptor (TAS2R) agonists denatonium and chloroquine display distinct patterns of relaxation of the guinea pig trachea. Am J Physiol Lung Cell Mol Physiol 303 L956 PMID: 22962016

Zhang et al (2009) Tamoxifen mediated estrogen receptor activation protects against early impairment of hippocampal neuron excitability in an oxygen/glucose deprivation brain slice ischemia model. Brain Res 1247 196 PMID: 18992727

Pyott et al (2004) Extrasynaptic localization of inactivating calcium-activated potassium channels in mouse inner hair cells. FASEB J 24 9469 PMID: 15509733

Ksiazek et al (2013) Properties of BK-type Ca(+) (+)-dependent K(+) channel currents in medial prefrontal cortex pyramidal neurons in rats of different ages. Front Cell Neurosci 7 185 PMID: 24312002

Bodhinathan et al (2010) Redox sensitive calcium stores underlie enhanced after hyperpolarization of aged neurons: role for ryanodine receptor mediated calcium signaling. J Neurophysiol 104 2586 PMID: 20884759

Parajuli et al (2014) Prostaglandin E2 excitatory effects on guinea pig urinary bladder smooth muscle: a novel regulatory mechanism mediated by large-conductance voltage- and Ca2+-activated K+ channels. Eur J Pharmacol 738 179 PMID: 24886877

Whitt et al (2016) BK channel inactivation gates daytime excitability in the circadian clock. Nat Commun 7 10837 PMID: 26940770

Hirono et al (2015) BK Channels Localize to the Paranodal Junction and Regulate Action Potentials in Myelinated Axons of Cerebellar Purkinje Cells. J Neurosci 35 7082 PMID: 25948259

Kim et al (2015) Astrocyte contributions to flow/pressure-evoked parenchymal arteriole vasoconstriction. J Neurophysiol 35 8245 PMID: 26019339

Gittis et al (2010) Mechanisms of sustained high firing rates in two classes of vestibular nucleus neurons: differential contributions of resurgent Na, Kv3, and BK currents. J Neurosci 104 1625 PMID: 20592126

Lai et al (2014) BK channels regulate sinoatrial node firing rate and cardiac pacing in vivo. Am J Physiol Heart Circ Physiol 307 H1327 PMID: 25172903

Wan et al (2013) Reduced vascular smooth muscle BK channel current underlies heart failure-induced vasoconstriction in mice. Nat Commun 27 1859 PMID: 23325318

Zhang et al (2008) Resveratrol attenuates early pyramidal neuron excitability impairment and death in acute rat hippocampal slices caused by oxygen-glucose deprivation. Exp Neurol 212 44 PMID: 18495119

Fernadez-Fernandez et al (2018) Activation of TREK currents by riluzole in three subgroups of cultured mouse nodose ganglion neurons. PLoS One 13 e0199282 PMID: 29928032

Abrahao et al (2017) Ethanol-Sensitive Pacemaker Neurons in the Mouse External Globus Pallidus. Neuropsychopharmacology 42 1070 PMID: 27827370

Do you know of a great paper that uses Paxilline from Tocris? Please let us know.

Reviews for Paxilline

Average Rating: 5 (Based on 1 Review.)

5 Star
4 Star
3 Star
2 Star
1 Star

Have you used Paxilline?

Submit a review and receive an Amazon gift card.

$50/€35/£30/$50CAN/¥300 Yuan/¥5000 Yen for first to review with an image

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review

Filter by:

Paxilline as a selective potassium blocker worked ideally to block SK channels.
By Farzana Islam on 10/06/2018
Assay Type: In Vitro
Species: Human

High-affinity and specific potassium channel blocker, used to study how it works to block SK (small conductance) channels. The product dissolved in DMSO and was excellent under lab conditions. Inhibition of SK channels were observed.

review image