Calmodulin

Calmodulin antagonists and inhibitors bind calmodulin, the main calcium sensor inside eukaryotic cells. Calmodulin is a small protein with four helix-loop-helix calcium-binding motifs that binds calcium ions and then regulates kinases, phosphatases, ion channels and phosphodiesterases. Its 1985 crystal structure showed two globular lobes joined by a long central helix. Naphthalenesulfonamides were among the first synthetic antagonists, and a 1981 study reported that W-7 inhibits cell proliferation. W-5 hydrochloride, an analog without the chlorine atom, binds calmodulin more weakly and often serves as a control. Fluphenazine-N-2-chloroethane hydrochloride is a phenothiazine-derived antagonist, and DY-9760e is a further calmodulin inhibitor. Calcium/calmodulin-dependent protein kinases are listed in the neighboring CaMK category.

9 Items

  • DY-9760e
    Cat. No.
    A25401

    DY-9760e

    DY-9760e is a selective calmodulin (CaM) inhibitor that disrupts the Ca²⁺/CaM complex, thereby inhibiting various calmodulin-dependent enzymes, including nNOS, CaM kinase II, and calcineurin (Ki values of 0.9, 1.4, and 2.0 μM, respectively). This compound effectively inhibits excessive nitric oxide production and protein tyrosine nitration, while also preventing the activation of calpain and caspase-3. DY-9760e has demonstrated potential in reducing infarct size, enhancing cardiac function, and mitigating oxidative stress and cell death, making it a valuable tool in research related to myocardial infarction, cerebral ischemia, and other related disorders.

    Out of stock

    All 3 sizes
  • Psoralenoside
    Cat. No.
    A33859

    Psoralenoside

    Psoralenoside is a benzofuran glycoside that functions as a calmodulin inhibitor. It demonstrates significant binding affinity for histaminergic H1 receptors and voltage-gated L-type calcium channels, making it a valuable tool in studying calcium signaling pathways. Psoralenoside exhibits estrogen-like activity, promotes osteoblastic proliferation, and displays both antitumor and antibacterial properties, positioning it as a versatile reagent for research in cancer biology, bone metabolism, and pharmacology.

    1 mg
    $80.00
    2 mg
    $115.00
    All 7 sizes
  • Metofenazate (diethanesulfonate)
    Cat. No.
    A39760

    Metofenazate (diethanesulfonate)

    Synonyms: Methophenazine (diethanesulfonate)

    Metofenazate (diethanesulfonate) is a selective inhibitor of calmodulin, a key calcium-binding messenger protein. It modulates calmodulin-mediated signaling pathways, making it a valuable tool for studying calcium-dependent cellular processes. This compound is widely used in research to investigate various physiological and pathological conditions associated with calmodulin activity.

    25 mg
    $1,275.00
    50 mg
    $1,625.00
    All 3 sizes
  • KS 501
    Cat. No.
    A66426

    KS 501

    KS 501 is a potent and selective inhibitor of calmodulin, primarily targeting calmodulin-dependent kinases I and II. By interfering with calmodulin activation, KS 501 effectively modulates downstream signaling without directly affecting cyclic adenosine 3’,5’-monophosphate (cAMP)-sensitive kinases. Its inhibitory action makes KS 501 a valuable tool for investigating the role of calmodulin in leukemia and other related biological pathways.

    25 mg
    $1,275.00
    All 1 sizes
  • Calmodulin antagonist-1
    Cat. No.
    A66434

    Calmodulin antagonist-1

    Calmodulin Antagonist-1 is a selective inhibitor of calmodulin (CaM), designed to hinder calmodulin-activated calcium-dependent phosphodiesterase (PDE) with an IC50 of 66 μM. This compound also exhibits competitive inhibition of trypsin-treated Ca2+-PDE, showcasing an IC50 of 560 μM in relation to cyclic GMP. Its ability to modulate calmodulin activity makes it a valuable tool for investigating calcium signaling pathways and their implications in various biological processes.

    5 mg
    $165.00
    10 mg
    $270.00
    All 2 sizes
  • Acremonidin A
    Cat. No.
    A66438

    Acremonidin A

    Acremonidin A is a potent calmodulin (CaM) inhibitor derived from Purpureocillium lilacinum. It demonstrates a strong binding affinity for the human calmodulin biosensor hCaM M124C-mBBr, exhibiting a Kd value of 19.40 nM. This compound is valuable for research applications focused on elucidating the roles of calmodulin in calcium signaling pathways and its implications in various physiological processes.

    25 mg
    $1,275.00
    50 mg
    $1,625.00
    All 3 sizes
  • Beauverolide Ja
    Cat. No.
    A66439

    Beauverolide Ja

    Beauverolide Ja is a potent calmodulin (CaM) inhibitor, demonstrating a Kd of 0.078 μM and a Ki of 0.39 μM for the Ca2+-CaM complex. This cyclotetradepsipeptide, derived from the secondary metabolite of Isaria fumosorosea, is valuable for research investigating calmodulin's role in calcium signaling pathways. Its effective inhibition of calmodulin can facilitate studies into various biological processes and potential therapeutic applications.

    Out of stock

    All 3 sizes
  • Bisindolylmaleimide VII
    Cat. No.
    A66449

    Bisindolylmaleimide VII

    Bisindolylmaleimide VII is a potent calmodulin inhibitor with a high binding affinity (Kd = 186.2 nM). This compound is instrumental in elucidating the role of calmodulin in various biological processes and disease states, including cancer, neurodegenerative disorders, and muscle dysfunction. Its application in research facilitates a deeper understanding of calmodulin's contribution to cellular signaling pathways and potential therapeutic interventions.

    25 mg
    $1,275.00
    50 mg
    $1,625.00
    All 3 sizes
  • Prenylamine lactate
    Cat. No.
    B21471

    Prenylamine lactate

    Prenylamine lactate is a calcium-modulating protein (CaM) antagonist that effectively inhibits CaM-dependent enzymes, demonstrating the ability to induce relaxation in smooth muscle preparations. Notably, the action of Prenylamine lactate on smooth muscle is not counteracted by the calcium agonist Bay K 8644. Additionally, under conditions of lower heart rates, Prenylamine lactate has been reported to enhance voltage-dependent transmembrane calcium currents, making it a valuable tool for studying calcium signaling pathways and smooth muscle physiology.

    25 mg
    $1,275.00
    50 mg
    $1,625.00
    All 3 sizes

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