Psalmotoxin 1 (TFA)

Psalmotoxin 1 (PcTx1) TFA is a protein toxin that can bind at subunit-subunit interfaces of acid-sensing ion channel 1a (ASIC1a). Psalmotoxin 1 TFA is a potent and slective ASIC1a inhibitor (IC50: 0.9 nM) by increasing the apparent affinity for H+ of ASIC1a. Psalmotoxin 1 TFA can induce cell apoptosis, also inhibits cell migration, proferliration and invasion of cancer cells. Psalmotoxin 1 TFA can be used in the research of cancers, or neurological disease[1][3][4][6].

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[1]Chen X, et al. The tarantula toxin psalmotoxin 1 inhibits acid-sensing ion channel (ASIC) 1a by increasing its apparent H⁺ affinity. J Gen Physiol. 2005 Jul;126(1):71-9.|[2]Claudia A McCarthy, et al. PcTx1 affords neuroprotection in a conscious model of stroke in hypertensive rats via selective inhibition of ASIC1a. Neuropharmacology. 2015 Dec;99:650-7. |[3]Niko Joeres, et al. Functional and pharmacological characterization of two different ASIC1a/2a heteromers reveals their sensitivity to the spider toxin PcTx1. Sci Rep. 2016 Jun 9;6:27647. doi: 10.1038/srep27647. |[4]Chao Yang, et al. Overexpression of acid-sensing ion channel 1a (ASIC1a) promotes breast cancer cell proliferation, migration and invasion. Transl Cancer Res. 2020 Dec;9(12):7519-7530. |[5]Feng Cai, et al. Acid-sensing ion channel 1a regulates the survival of nucleus pulposus cells in the acidic environment of degenerated intervertebral discs. Iran J Basic Med Sci. 2016 Aug;19(8):812-820.|[6]P Escoubas, et al. Isolation of a tarantula toxin specific for a class of proton-gated Na+ channels. J Biol Chem. 2000 Aug 18;275(33):25116-21.