title: Molecular cloning, genomic organization and recombinant expression of a crustin-like antimicrobial peptide from black tiger shrimp Penaeus monodon.
abstract: A novel crustin-like antimicrobial peptide (Crus-likePm) was identified from haemocytes of Penaeus monodon. The deduced amino acid sequence of a Crus-likePm consists of 124 amino acid residues of the mature peptide and a signal peptide of 17 amino acid residues. The mature peptide contains a glycine-rich domain at the N-terminus and 12 conserved cysteine residues containing a single WAP domain at the C-terminus. Phylogenetic tree and sequence comparison clearly confirmed a distinct between a Crus-likePm and other shrimp crustins. Genomic organization and upstream region of a Crus-likePm gene was investigated. The gene consisted of two exons and one intron. The 5'-flanking regions of a Crus-likePm gene contain multiple putative transcription factor binding sites. mRNA transcript of a Crus-likePm was found to be abundantly expressed in haemocyte and highly up-regulated after Vibrio harveyi injection. The mature Crus-likePm was cloned into the pET28b with an N-terminal hexa-histidine tag fused in-frame, and expressed in E. coli. The purified recombinant Crus-likePm showed strong antimicrobial activity against both Gram-positive and Gram-negative bacteria including V. harveyi, a major pathogenic bacteria in shrimp aquaculture.
authors.affiliation: National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, 113 Paholyothin Rd., Klong1, Klong Luang, Pathumthani 12120, Thailand.
authors.forename: Piti
authors.initials: P
authors.lastname: Amparyup
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Kondo
authors.forename: Ikuo
authors.initials: I
authors.lastname: Hirono
authors.forename: Takashi
authors.initials: T
authors.lastname: Aoki
authors.forename: Anchalee
authors.initials: A
authors.lastname: Tassanakajon
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000900:Anti-Bacterial Agents / Q000378:metabolism / Q000494:pharmacology; D023181:Antimicrobial Cationic Peptides / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D001483:Base Sequence; D001665:Binding Sites; D003001:Cloning, Molecular; D005091:Exons; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D007438:Introns; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000378:metabolism* / Q000382:microbiology; D012333:RNA, Messenger / Q000378:metabolism; D011994:Recombinant Proteins / Q000494:pharmacology; D014733:Vibrio / Q000187:drug effects / Q000254:growth & development
chemical_list: D000900:Anti-Bacterial Agents; D023181:Antimicrobial Cationic Peptides; D012333:RNA, Messenger; D011994:Recombinant Proteins