ID   CR33_RANCA              Reviewed;          22 AA.
AC   P56240;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   15-JUL-1998, sequence version 1.
DT   25-MAY-2022, entry version 45.
DE   RecName: Full=Caerin-3.3;
OS   Ranoidea caerulea (Green tree frog) (Litoria caerulea).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Amphibia;
OC   Batrachia; Anura; Neobatrachia; Hyloidea; Hylidae; Pelodryadinae; Ranoidea.
OX   NCBI_TaxID=30344;
RN   [1]
RP   PROTEIN SEQUENCE, AMIDATION AT LYS-22, AND MASS SPECTROMETRY.
RC   TISSUE=Parotoid gland;
RA   Stone D.J.M., Waugh R.J., Bowie J.H., Wallace J.C., Tyler M.J.;
RT   "Peptides from Australian frogs. The structures of the caerins from Litoria
RT   caerula.";
RL   J. Chem. Res. 138:910-936(1993).
CC   -!- FUNCTION: Antibacterial peptide, that adopts an alpha helical
CC       conformation which can disrupt bacterial membranes. Each caerin
CC       displays a different antimicrobial specificity.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- TISSUE SPECIFICITY: Expressed by the skin parotoid and/or rostral
CC       glands.
CC   -!- MASS SPECTROMETRY: Mass=2424; Method=FAB; Evidence={ECO:0000269|Ref.1};
CC   -!- SIMILARITY: Belongs to the frog skin active peptide (FSAP) family.
CC       Caerin subfamily. {ECO:0000305}.
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DR   AlphaFoldDB; P56240; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0042742; P:defense response to bacterium; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Amidation; Amphibian defense peptide; Antibiotic; Antimicrobial;
KW   Direct protein sequencing; Secreted.
FT   PEPTIDE         1..22
FT                   /note="Caerin-3.3"
FT                   /id="PRO_0000043750"
FT   MOD_RES         22
FT                   /note="Lysine amide"
FT                   /evidence="ECO:0000269|Ref.1"
SQ   SEQUENCE   22 AA;  2427 MW;  1D440B2200D4367C CRC64;
     GLWEKIKEKA NELVSGIVEG VK