title: Purification, characterization and cloning of two novel tigerinin-like peptides from skin secretions of Fejervarya cancrivora.
abstract: While investigating the innate defense of brackish water-living amphibian and its comparison with freshwater-living amphibians, two novel 12-residue antimicrobial peptides were purified from the skin secretions of the crab-eating frog, Fejervarya cancrivora which typically inhabits brackish water of mangrove forests of Southeast Asia. These two antimicrobial peptides, tigerinin-RC1 and -RC2 share significant structural similarity with tigerinins found in the skin of Indian frog, Hoplobatrachus tigerinus. cDNAs encoding tigerinin-RC1 and -RC2 were also cloned from the skin cDNA library of F. cancrivora. Tigerinin-RC precursors are composed of 71 amino acid residues including a signal peptide, acidic spacer peptide, which are very similar to other amphibian antimicrobial peptide precursors and mature tigerinin-RC. The current results confirmed that both amphibians inhabiting freshwater and brackish water share the same antimicrobial peptide family to exert innate defense. Furthermore, the current work was also the first report of precursor and cDNA cloning of the tigerinin antimicrobial peptide family.
authors.affiliation: Biotoxin Units of Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, Yunnan, China.
authors.forename: Yuzhu
authors.initials: Y
authors.lastname: Song
authors.forename: Yi
authors.initials: Y
authors.lastname: Lu
authors.forename: Lijun
authors.initials: L
authors.lastname: Wang
authors.forename: Hailong
authors.initials: H
authors.lastname: Yang
authors.forename: Keyun
authors.initials: K
authors.lastname: Zhang
authors.forename: Ren
authors.initials: R
authors.lastname: Lai
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D023181:Antimicrobial Cationic Peptides / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D001483:Base Sequence; D002176:Candida albicans / Q000187:drug effects; D002850:Chromatography, Gel; D003001:Cloning, Molecular; D004912:Erythrocytes / Q000187:drug effects; D005260:Female; D008297:Male; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification* / Q000494:pharmacology; D011817:Rabbits; D011898:Ranidae / Q000235:genetics* / Q000378:metabolism*; D016415:Sequence Alignment; D012867:Skin / Q000378:metabolism*
chemical_list: D023181:Antimicrobial Cationic Peptides; D010455:Peptides