ID   H12A3_CYRHA             Reviewed;          97 AA.
AC   D2Y2H7;
DT   02-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   02-MAR-2010, sequence version 1.
DT   25-MAY-2022, entry version 25.
DE   RecName: Full=U6-theraphotoxin-Hhn1a 3;
DE            Short=U6-TRTX-Hhn1a;
DE   AltName: Full=Hainantoxin-XII.3 {ECO:0000312|EMBL:ADB56870.1};
DE            Short=HNTX-XII.3 {ECO:0000312|EMBL:ADB56870.1};
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: Ion channel inhibitor. {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. 12 (Hntx-12)
CC       subfamily. {ECO:0000305}.
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DR   EMBL; GU293054; ADB56870.1; -; mRNA.
DR   AlphaFoldDB; D2Y2H7; -.
DR   SMR; D2Y2H7; -.
DR   ArachnoServer; AS001585; U6-theraphotoxin-Hhn1a.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0008200; F:ion channel inhibitor activity; IEA:InterPro.
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   Disulfide bond; Ion channel impairing toxin; Knottin; Secreted; Signal;
KW   Toxin.
FT   SIGNAL          1..33
FT                   /evidence="ECO:0000255"
FT   PROPEP          34..61
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000400675"
FT   PEPTIDE         62..97
FT                   /note="U6-theraphotoxin-Hhn1a 3"
FT                   /id="PRO_0000400676"
FT   DISULFID        63..77
FT                   /evidence="ECO:0000250"
FT   DISULFID        70..82
FT                   /evidence="ECO:0000250"
FT   DISULFID        76..89
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   97 AA;  11184 MW;  A48A27D8983DDC9F CRC64;
     MLIKQFSRRS KNTKVQILLA FAALFVLAVG SYASESKKLD LRDALFSAMF SADYQLNPQE
     RGCRYFLGEC KKTSECCEHL ACHDKHKWCA WDWTIGK