Date published: 2026-6-5

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SK3 Activators

The chemical class of SK3 activators comprises a strategic selection of compounds designed to modulate the activity of SK3 channels, integral players in potassium ion regulation and cellular excitability. The small molecule NS309 exemplifies a direct activator within this class. By binding to SK3 channels, NS309 induces a conformational change that potentiates channel opening, allowing an increased influx of potassium ions. This positive modulation enhances the repolarization phase of the action potential, demonstrating NS309's role as a precise tool to investigate the physiological functions of SK3 channels. Additionally, the class includes compounds like 1-EBIO, both possessing the ability to positively modulate SK3 channels. 1-EBIO, a small molecule, acts as a channel opener by increasing the open probability of SK3 channels, thereby facilitating potassium ion efflux. These chemical activators, along with others mentioned, collectively form a comprehensive toolkit for researchers to explore the intricate regulatory mechanisms governing SK3 channel activity. Their precise and controlled actions provide valuable insights into the dynamic interplay of potassium ion flux, enabling a nuanced understanding of the cellular responses influenced by SK3 function.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

CyPPA

73029-73-9sc-205281
sc-205281A
10 mg
50 mg
$145.00
$645.00
(0)

CyPPA is a potent modulator of small-conductance calcium-activated potassium (SK) channels, distinguished by its selective binding to the channel's extracellular regions. This interaction induces conformational changes that enhance channel opening, facilitating ion flow. The compound exhibits unique reaction kinetics, with a rapid association rate that allows for swift modulation of channel activity. Additionally, CyPPA's hydrophobic characteristics promote effective membrane penetration, influencing its bioavailability and interaction with lipid bilayers.

NS309

18711-16-5sc-253202
5 mg
$110.00
(1)

NS309, a small molecule activator, directly activates SK3 channels. NS309 binds to the calmodulin-binding domain of SK3, leading to the potentiation of channel opening. This direct activation enhances the flow of potassium ions through SK3 channels, modulating membrane potential and influencing cellular processes dependent on SK3 channel activity.

1-EBIO

10045-45-1sc-201695
sc-201695A
10 mg
50 mg
$87.00
$325.00
1
(1)

EBIO, a chemical activator, directly stimulates SK channels, including SK3, by enhancing channel opening. EBIO's activation of SK3 is mediated by an increase in intracellular calcium concentration, leading to the potentiation of channel activity. This direct modulation of SK3 by EBIO offers a valuable tool for studying the physiological roles of SK3 channels and their impact on cellular processes such as neuronal excitability.

DCEBIO

60563-36-2sc-203561
sc-203561A
10 mg
50 mg
$107.00
$417.00
3
(0)

DCEBIO, a positive modulator of SK channels, including SK3, enhances channel opening and promotes potassium ion conductance. By modulating the calcium sensitivity of SK3, DCEBIO directly influences channel activity, impacting cellular processes dependent on SK3 function.

Naphthol AS

92-77-3sc-215536A
sc-215536
25 g
500 g
$42.00
$162.00
(1)

Naphthol AS-E phosphate, a chemical activator, directly stimulates SK channels, including SK3, by promoting calcium sensitivity and channel opening. Through its action on SK3, Naphthol AS-E phosphate increases potassium ion conductance, influencing cellular processes dependent on SK3 channel activity.

Ampeloptin

27200-12-0sc-480419
10 mg
$300.00
(0)

Ampeloptin, a flavonoid, may act as an indirect activator of SK3 by modulating cellular pathways associated with SK channel regulation. Its potential to influence calcium signaling and cellular redox status suggests a modulatory role in SK3 channel activity.