ID   TX16_PHONI              Reviewed;          68 AA.
AC   P83997;
DT   19-JUL-2004, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   25-MAY-2022, entry version 32.
DE   RecName: Full=U19-ctenitoxin-Pn1a;
DE            Short=U19-CNTX-Pn1a;
DE   AltName: Full=Non-toxic venom protein PNTx16C1;
OS   Phoneutria nigriventer (Brazilian armed spider) (Ctenus nigriventer).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Araneomorphae; Entelegynae; Lycosoidea; Ctenidae; Phoneutria.
OX   NCBI_TaxID=6918;
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, FUNCTION, SUBCELLULAR LOCATION, TISSUE SPECIFICITY, MASS
RP   SPECTROMETRY, AND PYROGLUTAMATE FORMATION AT GLN-1.
RC   TISSUE=Venom {ECO:0000269|Ref.1};
RA   Richardson M., Pimenta A.M.C., Bemquerer M.P., Santoro M.M.,
RA   Figueiredo S.G., Cordeiro M.N.;
RT   "Non-toxic protein PNTx16C1 from venom of Brazilian armed spider Phoneutria
RT   nigriventer has sequence similarities with toxins from other spiders.";
RL   Submitted (MAY-2004) to UniProtKB.
CC   -!- FUNCTION: Non-toxic to mice and insects. {ECO:0000269|Ref.1}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|Ref.1}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland. {ECO:0000269|Ref.1}.
CC   -!- MASS SPECTROMETRY: Mass=7666.6; Method=Electrospray;
CC       Evidence={ECO:0000269|Ref.1};
CC   -!- SIMILARITY: Belongs to the u-CNTX family.
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DR   AlphaFoldDB; P83997; -.
DR   SMR; P83997; -.
DR   ArachnoServer; AS000213; U19-ctenitoxin-Pn1a.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Pyrrolidone carboxylic acid;
KW   Secreted.
FT   CHAIN           1..68
FT                   /note="U19-ctenitoxin-Pn1a"
FT                   /id="PRO_0000087647"
FT   MOD_RES         1
FT                   /note="Pyrrolidone carboxylic acid"
FT                   /evidence="ECO:0000269|Ref.1"
FT   DISULFID        8..19
FT                   /evidence="ECO:0000250|UniProtKB:P25687"
FT   DISULFID        13..28
FT                   /evidence="ECO:0000250|UniProtKB:P25687"
FT   DISULFID        18..51
FT                   /evidence="ECO:0000250|UniProtKB:P25687"
FT   DISULFID        38..59
FT                   /evidence="ECO:0000250|UniProtKB:P25687"
FT   DISULFID        53..65
FT                   /evidence="ECO:0000250|UniProtKB:P25687"
SQ   SEQUENCE   68 AA;  7605 MW;  F7DF2844EBFE5FC1 CRC64;
     QWIPGQSCTN ADCGEGQCCT GGSYNRHCQS LSDDGKPCQR PNKYDEYKFG CPCKEGLMCQ
     VINYCQKK