General Information of This Target
Target ID
BTDT10184
Target Name
Potassium voltage-gated channel subfamily A member 2
Target Bioclass
Transporter and channel
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N.A.
Toxin Information Related to This Target
                           Toxin Name Activity Data Type Activity Data Reference
 Toxin Info    HgTX1 (A19Y,Y37F) Dissociation constant
0.17 pM
[1]
 Toxin Info    Kunitz-type serine protease inhibitor homolog alpha-dendrotoxin Dissociation constant
0.6 nM
[2], [3], [4], [5]
 Toxin Info    Potassium channel toxin alpha-KTx 32.1 Dissociation constant
0.96 nM
[6]
 Toxin Info    Potassium channel toxin alpha-KTx 2.13 Dissociation constant
1.3 nM
[7]
 Toxin Info    Potassium channel toxin alpha-KTx 4.6 Dissociation constant
1.9 nM
[8]
 Toxin Info    Kappa-actitoxin-Bgr1a Dissociation constant
15 nM
[9- 16]
 Toxin Info    Potassium channel toxin alpha-KTx 4.8 Dissociation constant
65 nM
[17]
 Toxin Info    PBTx3 (N24F,S2V,S3D,S4M,S6C,C7K,I8S,D9S,T10K,I11E,P12C,K13L,S14V,R15K,T17K,A18Q,F19A,Q20T,C21G,K22R,H23P,S24F,M25G,Y27C,R28M,L29N,S30R,F31K,R33K,K34C,T35Y,C36P,G37R) Dissociation constant
437.6 nM
[18]
 Toxin Info    Potassium channel toxin alpha-KTx 1.10 Dissociation constant
547 nM
[19], [18], [20]
 Toxin Info    Potassium channel toxin kappa-KTx 1.2 Dissociation constant
150 μM
[21- 25]
 Toxin Info    Venom peptide Sh41 Effect . [26]
 Toxin Info    Venom peptide Sh42 Effect . [26]
 Toxin Info    U-scoloptoxin(15)-Sm2a Effect . [27], [28]
 Toxin Info    Toxin MeKTx13-3 (D33H) Inhibition rate . [29]
 Toxin Info    MTX (C31[Abu],[Abu]) Inhibition rate . [30]
 Toxin Info    Conotoxin flf14b Inhibition rate . [31]
 Toxin Info    Kappa-theraphotoxin-Ps1a Inhibition rate . [32], [33], [34]
 Toxin Info    Kappa-theraphotoxin-Ps1b Inhibition rate . [32]
 Toxin Info    Neurotoxic enhancer CSTX-13 Inhibition rate . [35], [36], [37], [38]
 Toxin Info    Beta/kappa-theraphotoxin-Cg2a Inhibition rate . [39- 45]
 Toxin Info    Beta/kappa-theraphotoxin-Cg2a Inhibition rate . [39- 45]
 Toxin Info    Delta-theraphotoxin-Cg1a 1 Inhibition rate . [40- 50]
 Toxin Info    Kappa-theraphotoxin-Cg2a Inhibition rate . [40- 51]
 Toxin Info    Toxin PhcrTx2 Inhibition rate . [52]
 Toxin Info    Conopeptide Y-Fe1 Inhibition rate . [53]
 Toxin Info    Alpha/kappa-conotoxin pl14a Inhibition rate . [54]
 Toxin Info    Kunitz-type serine protease inhibitor homolog dendrotoxin K Inhibition rate . [55- 61]
 Toxin Info    Mambaquaretin-1 Inhibition rate . [62], [63], [64]
 Toxin Info    Potassium channel toxin gamma-KTx 2.1 Inhibition rate . [65- 74]
 Toxin Info    Potassium channel toxin gamma-KTx 2.1 Inhibition rate . [65- 74]
 Toxin Info    U18-theraphotoxin-Cg1a Inhibition rate . [40- 75]
 Toxin Info    U21-theraphotoxin-Cg1b Inhibition rate . [43], [40]
 Toxin Info    Kappa-theraphotoxin-Cg1a 1 Inhibition rate . [40- 77]
 Toxin Info    Kappa-actitoxin-Ael2a Inhibition rate . [15- 82]
 Toxin Info    Beta/kappa-theraphotoxin-Cg1a Inhibition rate . [40- 84]
 Toxin Info    Kunitz-type kappaPI-theraphotoxin-Hs1a Inhibition rate
10 %
[85- 89]
 Toxin Info    Kunitz-type kappaPI-theraphotoxin-Hs1a Inhibition rate
10 %
[85- 89]
 Toxin Info    Defensin BmKDfsin5 Inhibition rate
10.2 %
[90], [91]
 Toxin Info    Delta/kappa-actitoxin-Avd4a Inhibition rate
19 %
[15- 96]
 Toxin Info    Potassium channel toxin alpha-KTx Ctri9577 Inhibition rate
22 %
[97]
 Toxin Info    Kunitz-type serine protease inhibitor LmKTT-1a Inhibition rate
25 %
[98], [99], [100], [101]
 Toxin Info    Defensin BmKDfsin4 Inhibition rate
30.5 %
[90- 103]
 Toxin Info    Potassium channel toxin alpha-KTx 7.1 IC50
0.032 nM
[104], [105]
 Toxin Info    Potassium channel toxin alpha-KTx 6.2 IC50
0.12 - 0.8 nM
[106- 118]
 Toxin Info    Kunitz-type serine protease inhibitor homolog dendrotoxin I IC50
0.13 - 50 nM
[3- 121]
 Toxin Info    Potassium channel toxin alpha-KTx 2.5 IC50
0.17 nM
[1- 123]
 Toxin Info    HgTX1 (A19Y,Y37F) IC50
0.29 nM
[1]
 Toxin Info    Kunitz-type serine protease inhibitor homolog alpha-dendrotoxin IC50
0.4 - 150 nM
[2], [3], [4], [5]
 Toxin Info    Potassium channel toxin alpha-KTx 2.2 IC50
0.675 nM
[124], [125], [126], [127]
 Toxin Info    Potassium channel toxin alpha-KTx 2.2 IC50
0.675 nM
[1- 130]
 Toxin Info    Potassium channel toxin alpha-KTx 9.5 IC50
2.5 nM
[131]
 Toxin Info    Potassium channel toxin alpha-KTx 6.13 IC50
2.5 nM
[20- 122]
 Toxin Info    Potassium channel toxin alpha-KTx 3.7 IC50
5.4 nM
[122- 134]
 Toxin Info    Potassium channel toxin alpha-KTx 12.1 IC50
6.19 nM
[118- 142]
 Toxin Info    Kappa-stichotoxin-She3a IC50
9 nM
[11- 155]
 Toxin Info    Potassium channel toxin alpha-KTx 3.2 IC50
26.8 nM
[115- 158]
 Toxin Info    Potassium channel toxin alpha-KTx 3.19 IC50
105.9 nM
[159], [160]
 Toxin Info    Kappa-actitoxin-Avd6a IC50
140 nM
[15- 161]
 Toxin Info    Kappa-actitoxin-Ate1a IC50
146 nM
[162]
 Toxin Info    Potassium channel toxin AbeTx1 IC50
167.36 nM
[163]
 Toxin Info    Potassium channel toxin alpha-KTx 8.5 IC50
183 nM
[164]
 Toxin Info    Crotamine IC50
386 nM
[165- 182]
 Toxin Info    Tityustoxin-19 IC50
544 nM
[124], [125], [126], [127]
 Toxin Info    Conopeptide Y-Fe1 IC50
>30 μM
[53]
 Toxin Info    KappaPI-actitoxin-Avd3c IC50
1.1 μM
[15- 161]
 Toxin Info    KappaPI-actitoxin-Avd3d IC50
1.3 μM
[15- 161]
 Toxin Info    U-actitoxin-Oulsp1 IC50
1.8 - 2.5 μM
[183]
 Toxin Info    Conopeptide Y-Pl1 IC50
2 μM
[53]
 Toxin Info    U-actitoxin-Avd3f IC50
2.8 μM
[15- 185]
 Toxin Info    U-actitoxin-Avd3h IC50
2.8 μM
[15- 185]
 Toxin Info    KappaPI-actitoxin-Avd3b IC50
2.8 μM
[15- 161]
 Toxin Info    Potassium channel toxin alpha-KTx 12.5 IC50
12.5 μM
[98- 186]
References
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Ref 6 Cm28, a scorpion toxin having a unique primary structure, inhibits KV1.2 and KV1.3 with high affinity. J Gen Physiol. 2022 Aug 1;154(8):e202213146. doi: 10.1085/jgp.202213146. Epub 2022 Jun 14.
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Ref 16 On the convergent evolution of animal toxins. Conservation of a diad of functional residues in potassium channel-blocking toxins with unrelated structures. J Biol Chem. 1997 Feb 14;272(7):4302-9. doi: 10.1074/jbc.272.7.4302.
Ref 17 Characterization and Chemical Synthesis of Cm39 (-KTx 4.8): A Scorpion Toxin That Inhibits Voltage-Gated K(+) Channel K(V)1.2 and Small- and Intermediate-Conductance Ca(2+)-Activated K(+) Channels K(Ca)2.2 and K(Ca)3.1. Toxins (Basel). 2023 Jan 5;15(1):41. doi: 10.3390/toxins15010041.
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Ref 21 kappa-Hefutoxin1, a novel toxin from the scorpion Heterometrus fulvipes with unique structure and function. Importance of the functional diad in potassium channel selectivity. J Biol Chem. 2002 Aug 16;277(33):30040-7. doi: 10.1074/jbc.M111258200. Epub 2002 May 28.
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Ref 45 Pharmacological characterization of potent and selective NaV1.7 inhibitors engineered from Chilobrachys jingzhao tarantula venom peptide JzTx-V. PLoS One. 2018 May 3;13(5):e0196791. doi: 10.1371/journal.pone.0196791. eCollection 2018.
Ref 46 Jingzhaotoxin-I, a novel spider neurotoxin preferentially inhibiting cardiac sodium channel inactivation. J Biol Chem. 2005 Apr 1;280(13):12069-76. doi: 10.1074/jbc.M411651200. Epub 2004 Nov 17.
Ref 47 Characterization of the excitatory mechanism induced by Jingzhaotoxin-I inhibiting sodium channel inactivation. Toxicon. 2007 Sep 15;50(4):507-17. doi: 10.1016/j.toxicon.2007.04.018. Epub 2007 May 3.
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Ref 49 Molecular determinant for the tarantula toxin Jingzhaotoxin-I slowing the fast inactivation of voltage-gated sodium channels. Toxicon. 2016 Mar 1;111:13-21. doi: 10.1016/j.toxicon.2015.12.009. Epub 2015 Dec 23.
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Ref 51 Jingzhaotoxin-XII, a gating modifier specific for Kv4.1 channels. Toxicon. 2007 Oct;50(5):646-52. doi: 10.1016/j.toxicon.2007.05.009. Epub 2007 Jun 3.
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Ref 62 Green mamba peptide targets type-2 vasopressin receptor against polycystic kidney disease. Proc Natl Acad Sci U S A. 2017 Jul 3;114(27):7154-7159. doi: 10.1073/pnas.1620454114. Epub 2017 Jun 19.
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Ref 64 A new Kunitz-type snake toxin family associated with an original mode of interaction with the vasopressin 2 receptor. Br J Pharmacol. 2022 Jul;179(13):3470-3481. doi: 10.1111/bph.15814. Epub 2022 Feb 28.
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Ref 66 M-type K+ current inhibition by a toxin fron the scorpion Buthus eupeus. FEBS Lett. 1996 Apr 22;384(3):277-80. doi: 10.1016/0014-5793(96)00333-x.
Ref 67 BeKm-1 is a HERG-specific toxin that shares the structure with ChTx but the mechanism of action with ErgTx1. Biophys J. 2003 May;84(5):3022-36. doi: 10.1016/S0006-3495(03)70028-9.
Ref 68 Preferential closed channel blockade of HERG potassium currents by chemically synthesised BeKm-1 scorpion toxin. FEBS Lett. 2003 Jul 17;547(1-3):20-6. doi: 10.1016/s0014-5793(03)00662-8.
Ref 69 Unique interaction of scorpion toxins with the hERG channel. J Mol Recognit. 2004 May-Jun;17(3):209-17. doi: 10.1002/jmr.667.
Ref 70 Species diversity and peptide toxins blocking selectivity of ether-a-go-go-related gene subfamily K+ channels in the central nervous system. Mol Pharmacol. 2006 May;69(5):1673-83. doi: 10.1124/mol.105.019729. Epub 2006 Feb 23.
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Ref 73 Interaction simulation of hERG K+ channel with its specific BeKm-1 peptide: insights into the selectivity of molecular recognition. J Proteome Res. 2007 Feb;6(2):611-20. doi: 10.1021/pr060368g.
Ref 74 New binding site on common molecular scaffold provides HERG channel specificity of scorpion toxin BeKm-1. J Biol Chem. 2002 Nov 8;277(45):43104-9. doi: 10.1074/jbc.M204083200. Epub 2002 Jul 31.
Ref 75 Jingzhaotoxin-IX, a novel gating modifier of both sodium and potassium channels from Chinese tarantula Chilobrachys jingzhao. Neuropharmacology. 2009 Aug;57(2):77-87. doi: 10.1016/j.neuropharm.2009.04.009. Epub 2009 May 4.
Ref 76 Solution structure and functional characterization of jingzhaotoxin-XI: a novel gating modifier of both potassium and sodium channels. Biochemistry. 2006 Dec 26;45(51):15591-600. doi: 10.1021/bi061457+.
Ref 77 The tarantula toxin jingzhaotoxin-XI (-theraphotoxin-Cj1a) regulates the activation and inactivation of the voltage-gated sodium channel Nav1.5. Toxicon. 2014 Dec 15;92:6-13. doi: 10.1016/j.toxicon.2014.09.002. Epub 2014 Sep 18.
Ref 78 APETx1, a new toxin from the sea anemone Anthopleura elegantissima, blocks voltage-gated human ether-a-go-go-related gene potassium channels. Mol Pharmacol. 2003 Jul;64(1):59-69. doi: 10.1124/mol.64.1.59.
Ref 79 APETx1 from sea anemone Anthopleura elegantissima is a gating modifier peptide toxin of the human ether-a-go-go- related potassium channel. Mol Pharmacol. 2007 Aug;72(2):259-68. doi: 10.1124/mol.107.035840. Epub 2007 May 1.
Ref 80 A natural point mutation changes both target selectivity and mechanism of action of sea anemone toxins. FASEB J. 2012 Dec;26(12):5141-51. doi: 10.1096/fj.12-218479. Epub 2012 Sep 12.
Ref 81 Defensin-neurotoxin dyad in a basally branching metazoan sea anemone. FEBS J. 2017 Oct;284(19):3320-3338. doi: 10.1111/febs.14194. Epub 2017 Sep 6.
Ref 82 Solution structure of APETx1 from the sea anemone Anthopleura elegantissima: a new fold for an HERG toxin. Proteins. 2005 May 1;59(2):380-6. doi: 10.1002/prot.20425.
Ref 83 Jingzhaotoxin-III, a novel spider toxin inhibiting activation of voltage-gated sodium channel in rat cardiac myocytes. J Biol Chem. 2004 Jun 18;279(25):26220-6. doi: 10.1074/jbc.M401387200. Epub 2004 Apr 14.
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