TOP2C_OXYTA
ID TOP2C_OXYTA Reviewed; 37 AA.
AC P83250;
DT 02-AUG-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2002, sequence version 1.
DT 25-MAY-2022, entry version 54.
DE RecName: Full=M-oxotoxin-Ot2c;
DE Short=M-OXTX-Ot2c;
DE AltName: Full=Oxki2c;
DE AltName: Full=Oxyopinin-2c;
OS Oxyopes takobius (Lynx spider) (Oxyopes foliiformis).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC Araneomorphae; Entelegynae; Lycosoidea; Oxyopidae; Oxyopes.
OX NCBI_TaxID=666126;
RN [1]
RP PROTEIN SEQUENCE, FUNCTION, TISSUE SPECIFICITY, SUBCELLULAR LOCATION, MASS
RP SPECTROMETRY, AND CIRCULAR DICHROISM ANALYSIS.
RC TISSUE=Venom;
RX PubMed=11976325; DOI=10.1074/jbc.m200511200;
RA Corzo G., Villegas E., Gomez-Lagunas F., Possani L.D., Belokoneva O.S.,
RA Nakajima T.;
RT "Oxyopinins, large amphipathic peptides isolated from the venom of the wolf
RT spider Oxyopes kitabensis with cytolytic properties and positive
RT insecticidal cooperativity with spider neurotoxins.";
RL J. Biol. Chem. 277:23627-23637(2002).
CC -!- FUNCTION: Disrupts biological membranes, particularly those rich in
CC phosphocholine. Has antimicrobial activity against Gram-negative
CC bacterium E.coli, Gram-positive bacteria B.subtilis and S.aureus, and
CC hemolytic activity against sheep, pig and guinea pig red blood cells.
CC Has insecticidal activity against S.frugiperda ovarian cells by opening
CC non-selective ion channels. Enhances the insecticidal activity of
CC spider venom neurotoxic peptides. {ECO:0000269|PubMed:11976325}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:11976325}.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC {ECO:0000269|PubMed:11976325}.
CC -!- MASS SPECTROMETRY: Mass=4064.7; Method=MALDI;
CC Evidence={ECO:0000269|PubMed:11976325};
CC -!- SIMILARITY: Belongs to the cationic peptide 02 (oxyopinin-2) family.
CC {ECO:0000305}.
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DR AlphaFoldDB; P83250; -.
DR SMR; P83250; -.
DR TCDB; 1.C.68.1.2; the channel-forming oxyopinin peptide (oxyopinin) family.
DR ArachnoServer; AS000188; M-oxotoxin-Ot2c.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR GO; GO:0042742; P:defense response to bacterium; IEA:UniProtKB-KW.
DR GO; GO:0019836; P:hemolysis by symbiont of host erythrocytes; IEA:InterPro.
DR GO; GO:0044179; P:hemolysis in another organism; IEA:UniProtKB-KW.
DR InterPro; IPR012522; Antimicrobial_3.
DR Pfam; PF08025; Antimicrobial_3; 1.
PE 1: Evidence at protein level;
KW Antibiotic; Antimicrobial; Cytolysis; Direct protein sequencing; Hemolysis;
KW Secreted; Toxin.
FT PEPTIDE 1..37
FT /note="M-oxotoxin-Ot2c"
FT /id="PRO_0000045033"
SQ SEQUENCE 37 AA; 4065 MW; EEE88975C9884F4E CRC64;
GKLSGISKVL RAIAKFFKGV GKARKQFKEA SDLDKNQ