H3K01_CYRHA
ID H3K01_CYRHA Reviewed; 83 AA.
AC D2Y200;
DT 02-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 02-MAR-2010, sequence version 1.
DT 25-MAY-2022, entry version 29.
DE RecName: Full=Mu-theraphotoxin-Hhn2d;
DE Short=Mu-TRTX-Hhn2d;
DE AltName: Full=Hainantoxin-III-11;
DE Short=HNTX-III-11;
DE Flags: Precursor;
OS Cyriopagopus hainanus (Chinese bird spider) (Haplopelma hainanum).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC Mygalomorphae; Theraphosidae; Haplopelma.
OX NCBI_TaxID=209901;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC TISSUE=Venom gland;
RX PubMed=20192277; DOI=10.1021/pr1000016;
RA Tang X., Zhang Y., Hu W., Xu D., Tao H., Yang X., Li Y., Jiang L.,
RA Liang S.;
RT "Molecular diversification of peptide toxins from the tarantula Haplopelma
RT hainanum (Ornithoctonus hainana) venom based on transcriptomic, peptidomic,
RT and genomic analyses.";
RL J. Proteome Res. 9:2550-2564(2010).
CC -!- FUNCTION: Lethal neurotoxin. Selectively blocks tetrodotoxin-sensitive
CC voltage-gated sodium channels (Nav). Does not affect tetrodotoxin-
CC resistant voltage-gated sodium channels or calcium channels (By
CC similarity). {ECO:0000250}.
CC -!- SUBUNIT: Monomer. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC -!- DOMAIN: The presence of a 'disulfide through disulfide knot'
CC structurally defines this protein as a knottin. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the neurotoxin 10 (Hwtx-1) family. 15 (Hntx-3)
CC subfamily. {ECO:0000305}.
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DR EMBL; GU292877; ADB56693.1; -; mRNA.
DR AlphaFoldDB; D2Y200; -.
DR SMR; D2Y200; -.
DR ArachnoServer; AS001989; mu-theraphotoxin-Hhn2d.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0008200; F:ion channel inhibitor activity; IEA:InterPro.
DR GO; GO:0017080; F:sodium channel regulator activity; IEA:UniProtKB-KW.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR InterPro; IPR011696; Huwentoxin-1.
DR InterPro; IPR013140; Huwentoxin_CS1.
DR Pfam; PF07740; Toxin_12; 1.
DR PROSITE; PS60021; HWTX_1; 1.
PE 2: Evidence at transcript level;
KW Amidation; Disulfide bond; Ion channel impairing toxin; Knottin;
KW Neurotoxin; Presynaptic neurotoxin; Secreted; Signal; Toxin;
KW Voltage-gated sodium channel impairing toxin.
FT SIGNAL 1..21
FT /evidence="ECO:0000255"
FT PROPEP 22..48
FT /evidence="ECO:0000250"
FT /id="PRO_0000400554"
FT PEPTIDE 49..81
FT /note="Mu-theraphotoxin-Hhn2d"
FT /id="PRO_0000400555"
FT MOD_RES 81
FT /note="Leucine amide"
FT /evidence="ECO:0000250"
FT DISULFID 50..65
FT /evidence="ECO:0000250"
FT DISULFID 57..70
FT /evidence="ECO:0000250"
FT DISULFID 64..77
FT /evidence="ECO:0000250"
SQ SEQUENCE 83 AA; 9145 MW; AEE1DBE18B29B622 CRC64;
MKASMFLALA GLVLLFVVGY ASESEEKEFP RELLSKIFAV DDFKGEERGC KGFGDSCTPG
KNECCPNYAC SSKHKWCKVL LGK