ID   JZ21B_CHIGU             Reviewed;          77 AA.
AC   B1P1E7;
DT   05-OCT-2010, integrated into UniProtKB/Swiss-Prot.
DT   29-APR-2008, sequence version 1.
DT   25-MAY-2022, entry version 26.
DE   RecName: Full=U14-theraphotoxin-Cg1a 2;
DE            Short=U14-TRTX-Cg1a;
DE   AltName: Full=Jingzhaotoxin-21.2 {ECO:0000312|EMBL:ABY71697.1};
DE            Short=JZTX-21.2 {ECO:0000312|EMBL:ABY71697.1};
DE   AltName: Full=Peptide F3-11.69 {ECO:0000303|PubMed:17476710};
DE   Flags: Precursor;
OS   Chilobrachys guangxiensis (Chinese earth tiger tarantula) (Chilobrachys
OS   jingzhao).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Mygalomorphae; Theraphosidae; Chilobrachys.
OX   NCBI_TaxID=278060;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Venom gland;
RX   PubMed=18581053; DOI=10.1007/s00018-008-8135-x;
RA   Chen J., Deng M., He Q., Meng E., Jiang L., Liao Z., Rong M., Liang S.;
RT   "Molecular diversity and evolution of cystine knot toxins of the tarantula
RT   Chilobrachys jingzhao.";
RL   Cell. Mol. Life Sci. 65:2431-2444(2008).
RN   [2]
RP   PROTEIN SEQUENCE OF 50-77, MASS SPECTROMETRY, AND AMIDATION AT LYS-77.
RC   TISSUE=Venom;
RX   PubMed=17476710; DOI=10.1002/pmic.200600785;
RA   Liao Z., Cao J., Li S., Yan X., Hu W., He Q., Chen J., Tang J., Xie J.,
RA   Liang S.;
RT   "Proteomic and peptidomic analysis of the venom from Chinese tarantula
RT   Chilobrachys jingzhao.";
RL   Proteomics 7:1892-1907(2007).
CC   -!- FUNCTION: Probable ion channel inhibitor.
CC   -!- SUBCELLULAR LOCATION: Secreted.
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   -!- MASS SPECTROMETRY: Mass=3083.0; Method=MALDI; Note=Monoisotopic mass.;
CC       Evidence={ECO:0000269|PubMed:17476710};
CC   -!- SIMILARITY: Belongs to the neurotoxin 10 (Hwtx-1) family. 65 (Jztx-21)
CC       subfamily. {ECO:0000305}.
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DR   EMBL; EU233878; ABY71697.1; -; mRNA.
DR   AlphaFoldDB; B1P1E7; -.
DR   ArachnoServer; AS000825; U14-theraphotoxin-Cg1b.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0099106; F:ion channel regulator activity; IEA:UniProtKB-KW.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Amidation; Direct protein sequencing; Disulfide bond;
KW   Ion channel impairing toxin; Knottin; Secreted; Signal; Toxin.
FT   SIGNAL          1..21
FT                   /evidence="ECO:0000255"
FT   PROPEP          22..49
FT                   /evidence="ECO:0000269|PubMed:17476710"
FT                   /id="PRO_0000398441"
FT   PEPTIDE         50..77
FT                   /note="U14-theraphotoxin-Cg1a 2"
FT                   /id="PRO_0000398442"
FT   MOD_RES         77
FT                   /note="Lysine amide"
FT                   /evidence="ECO:0000269|PubMed:17476710"
FT   DISULFID        50..64
FT                   /evidence="ECO:0000250"
FT   DISULFID        57..69
FT                   /evidence="ECO:0000250"
FT   DISULFID        63..75
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   77 AA;  8296 MW;  83401CC897493E5C CRC64;
     MKTSVLLVIL GIAAITVQCT ASESVKQDSL RTFVDAVLGW NAEMASEARC GGWMAKCADS
     DDCCETFHCT RFNVCGK