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Potent and selective blocker of BKCa (KCa1.1) channels (IC50 values are 6.4 and 64.4 nM for BKCa channels containing α subunits only, and those containing α and β1 respectively). Displays no effect on native delayed rectifier K+ and KATP currents, or cloned KV1.5 channels. Blocks BKCa channels in both inside-out and cell-attached patches. Shown to enhance smooth muscle contraction in vitro and increase total peripheral resistance in vivo.
|Storage||Store at -20°C|
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.
|Solvent||Max Conc. mg/mL||Max Conc. mM|
Preparing Stock Solutions
The following data is based on the product molecular weight 634.2. 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.
|Concentration / Solvent Volume / Mass||1 mg||5 mg||10 mg|
|0.1 mM||15.77 mL||78.84 mL||157.68 mL|
|0.5 mM||3.15 mL||15.77 mL||31.54 mL|
|1 mM||1.58 mL||7.88 mL||15.77 mL|
|5 mM||0.32 mL||1.58 mL||3.15 mL|
References are publications that support the biological activity of the product.
Asano et al (2012) Penitrem A as a tool for understanding the role of large conductance Ca2+/voltage-sensitive K+ channels in vascular function. J.Pharmacol.Exp.Ther. 342 453 PMID: 22580348
Knaus et al (1994) Tremorgenic indole alkaloids potently inhibit smooth muscle high-conductance calcium-activated potassium channels. Biochemistry 33 5819 PMID: 7514038
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Keywords: Penitrem A, Penitrem A supplier, PenitremA, maxi-k, bk, channels, potent, selective, inhibitors, inhibits, blockers, slo, KCa, KCa1.1, K+, high, conductance, Ca2+-dependent, Potassium, Ca2+-activated, Ca2+-Activated, Channels, 4617, Tocris Bioscience
3 Citations for Penitrem A
Citations are publications that use Tocris products. Selected citations for Penitrem A include:
Abrahao et al (2017) Ethanol-Sensitive Pacemaker Neurons in the Mouse External Globus Pallidus. Neuropsychopharmacology 42 1070 PMID: 27827370
Khan et al (2019) BK channels regulate extracellular Tat-mediated HIV-1 LTR transactivation. Sci Rep 9 12285 PMID: 31439883
Hirono et al (2015) BK Channels Localize to the Paranodal Junction and Regulate Action Potentials in Myelinated Axons of Cerebellar Purkinje Cells. J Biol Chem 35 7082 PMID: 25948259
Do you know of a great paper that uses Penitrem A from Tocris? Please let us know.
Reviews for Penitrem A
Average Rating: 4 (Based on 1 Review.)
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Product used to understand BK channel blocking activity on HEK 293 cell line.The cell line expresses brain alpha subunits of BK channel. Showed blocking activity on electrophysiological tests. Product worked ideally and would definitely worth buying.
Literature in this Area
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Epilepsy is a brain disease that affects 60 million people globally. More than 20 anti-seizure drugs are currently available, but these do not address the underlying causes of the condition. This poster summarizes current knowledge about the development of the condition and highlights some approaches that have disease-modifying effects in proof-of-concept studies.