KAX2Y_CENLM
ID KAX2Y_CENLM Reviewed; 23 AA.
AC P59850;
DT 19-SEP-2003, integrated into UniProtKB/Swiss-Prot.
DT 19-SEP-2003, sequence version 1.
DT 25-MAY-2022, entry version 48.
DE RecName: Full=Hongotoxin-4 {ECO:0000303|PubMed:9446567};
DE Short=HgTX4 {ECO:0000303|PubMed:9446567};
DE AltName: Full=Potassium channel toxin alpha-KTx 02 {ECO:0000305};
DE Flags: Fragment;
OS Centruroides limbatus (Bark scorpion).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC Scorpiones; Buthida; Buthoidea; Buthidae; Centruroides.
OX NCBI_TaxID=244936;
RN [1]
RP PROTEIN SEQUENCE, AND SUBCELLULAR LOCATION.
RX PubMed=9446567; DOI=10.1074/jbc.273.5.2639;
RA Koschak A., Bugianesi R.M., Mitterdorfer J., Kaczorowski G.J., Garcia M.L.,
RA Knaus H.-G.;
RT "Subunit composition of brain voltage-gated potassium channels determined
RT by hongotoxin-1, a novel peptide derived from Centruroides limbatus
RT venom.";
RL J. Biol. Chem. 273:2639-2644(1998).
CC -!- FUNCTION: Potent selective inhibitor of Kv1/KCNA voltage-gated
CC potassium channels. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:9446567}.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC {ECO:0000305|PubMed:9446567}.
CC -!- DOMAIN: Has the structural arrangement of an alpha-helix connected to
CC antiparallel beta-sheets by disulfide bonds (CS-alpha/beta).
CC {ECO:0000305}.
CC -!- SIMILARITY: Belongs to the short scorpion toxin superfamily. Potassium
CC channel inhibitor family. Alpha-KTx 02 subfamily. {ECO:0000305}.
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DR AlphaFoldDB; P59850; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0008200; F:ion channel inhibitor activity; IEA:InterPro.
DR GO; GO:0015459; F:potassium channel regulator activity; IEA:UniProtKB-KW.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR Gene3D; 3.30.30.10; -; 1.
DR InterPro; IPR036574; Scorpion_toxin-like_sf.
DR InterPro; IPR001947; Scorpion_toxinS_K_inh.
DR Pfam; PF00451; Toxin_2; 1.
DR SUPFAM; SSF57095; SSF57095; 1.
PE 1: Evidence at protein level;
KW Direct protein sequencing; Ion channel impairing toxin; Neurotoxin;
KW Potassium channel impairing toxin; Secreted; Toxin;
KW Voltage-gated potassium channel impairing toxin.
FT CHAIN 1..>23
FT /note="Hongotoxin-4"
FT /id="PRO_0000066835"
FT NON_TER 23
SQ SEQUENCE 23 AA; 2506 MW; 46EDC2CC38425272 CRC64;
KVIDVKCTSP KQCLPPCKAQ FGD