ID   CTX4_LACTA              Reviewed;         124 AA.
AC   C0HJV6; A0A1B3Z579;
DT   05-OCT-2016, integrated into UniProtKB/Swiss-Prot.
DT   20-JUN-2018, sequence version 2.
DT   25-MAY-2022, entry version 9.
DE   RecName: Full=Cytoinsectotoxin-4 {ECO:0000303|PubMed:27287558};
DE            Short=CIT-4 {ECO:0000303|PubMed:27287558};
DE   Flags: Precursor;
OS   Lachesana tarabaevi (Spider).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Araneomorphae; Entelegynae; Entelegynae incertae sedis; Zodariidae;
OC   Lachesana.
OX   NCBI_TaxID=379576;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 63-123, FUNCTION,
RP   SUBCELLULAR LOCATION, MASS SPECTROMETRY, TOXIC DOSE, AND AMIDATION AT
RP   PHE-123.
RC   TISSUE=Venom;
RX   PubMed=27287558; DOI=10.1042/bcj20160436;
RA   Kuzmenkov A.I., Sachkova M.Y., Kovalchuk S.I., Grishin E.V.,
RA   Vassilevski A.A.;
RT   "Lachesana tarabaevi, an expert in membrane-active toxins.";
RL   Biochem. J. 473:2495-2506(2016).
CC   -!- FUNCTION: Insecticidal and antimicrobial peptide. Has insecticidal
CC       activity against larvae of flesh fly S.carnaria. Has antibacterial
CC       activity against Gram-positive bacterium B.subtilis B-501 (MIC=2.5 uM)
CC       and Gram-negative bacterium E.coli DH5alpha (MIC=10 uM).
CC       {ECO:0000269|PubMed:27287558}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:27287558}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC       {ECO:0000305|PubMed:27287558}.
CC   -!- DOMAIN: The mature peptide may form alpha-helices which disrupt target
CC       cell membranes. {ECO:0000305|PubMed:27287558}.
CC   -!- MASS SPECTROMETRY: Mass=7128.9; Method=MALDI;
CC       Evidence={ECO:0000269|PubMed:27287558};
CC   -!- TOXIC DOSE: LD(50) is 75 ug/g in larvae of flesh fly S.carnaria.
CC       {ECO:0000269|PubMed:27287558}.
CC   -!- SIMILARITY: Belongs to the cationic peptide 06 (cytoinsectotoxin)
CC       family. {ECO:0000305}.
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DR   EMBL; KT591340; AOH73462.1; -; mRNA.
DR   AlphaFoldDB; C0HJV6; -.
DR   SMR; C0HJV6; -.
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.
PE   1: Evidence at protein level;
KW   Amidation; Antibiotic; Antimicrobial; Direct protein sequencing; Secreted;
KW   Signal; Toxin.
FT   SIGNAL          1..19
FT                   /evidence="ECO:0000255"
FT   PROPEP          20..62
FT                   /evidence="ECO:0000269|PubMed:27287558"
FT                   /id="PRO_0000444423"
FT   PEPTIDE         63..123
FT                   /note="Cytoinsectotoxin-4"
FT                   /evidence="ECO:0000269|PubMed:27287558"
FT                   /id="PRO_0000437252"
FT   MOD_RES         123
FT                   /note="Phenylalanine amide"
FT                   /evidence="ECO:0000269|PubMed:27287558"
SQ   SEQUENCE   124 AA;  14211 MW;  8FDA7569071139C7 CRC64;
     MKCFILAAAL VLAFACIAAS EPAETENEDL DDLSDLEDEE WLDELEEAAE YLESLREFEE
     SRGYKDYMSK AKDLYKDIKK DKRVKAVMKS SYMKEAKKLY KDNPVRDAYQ VYKGVKAGGK
     LLFG