H10C1_CYRHA
ID H10C1_CYRHA Reviewed; 65 AA.
AC D2Y2R4;
DT 02-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 02-MAR-2010, sequence version 1.
DT 25-MAY-2022, entry version 23.
DE RecName: Full=Hainantoxin-X-3;
DE Short=HNTX-X-3;
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 GENOMIC DNA].
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: Reversibly blocks N-type calcium channels (Cav2.2/CACNA1B) in
CC rat dorsal root ganglion cells. Elicits no toxic symptoms in either
CC vertebrates or invertebrates during a period of 48 hours post-
CC injection, when it was assayed in vivo by direct injection into mice
CC and cockroaches (By similarity). {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 36 family. 02 subfamily.
CC -!- CAUTION: While it is structurally defined as a knottin it lacks the
CC conserved Cys residue in position 39. {ECO:0000305}.
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DR EMBL; GU293141; ADB56957.1; -; Genomic_DNA.
DR AlphaFoldDB; D2Y2R4; -.
DR SMR; D2Y2R4; -.
DR ArachnoServer; AS001672; omega-theraphotoxin-Hhn2c.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0005246; F:calcium channel regulator activity; IEA:UniProtKB-KW.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE 3: Inferred from homology;
KW Calcium channel impairing toxin; Disulfide bond;
KW Ion channel impairing toxin; Knottin; Neurotoxin; Secreted; Signal; Toxin;
KW Voltage-gated calcium channel impairing toxin.
FT SIGNAL 1..20
FT /evidence="ECO:0000255"
FT PROPEP 21..37
FT /evidence="ECO:0000250"
FT /id="PRO_0000400976"
FT PEPTIDE 38..65
FT /note="Hainantoxin-X-3"
FT /id="PRO_0000400977"
FT DISULFID 46..59
FT /evidence="ECO:0000250"
FT DISULFID 55..64
FT /evidence="ECO:0000250"
SQ SEQUENCE 65 AA; 7264 MW; 05AC7C0104DD1918 CRC64;
MNMKILVLVA VLCLVVSTHA ERHSKTDMED SPMIQERKYL PPGKPCYEAT QKIPCCGVCS
HNNCT