title: Synthesis of esculentin-1 antibacterial peptide fragments on 1,4-butanediol dimethacrylate cross-linked polystyrene support.
abstract: Peptide segments corresponding to antibacterial esculentin-1 (1-15), (3344), (9-27), and their modified forms were synthesized on 1,4-butanediol dimethacrylate cross-linked polystyrene (PS-BDODMA) support. Hydroxymethyl and aminomethyl 2% PS-BDODMA supports were used for the synthesis. The HMPB linker was appended to the aminomethyl resin using HBTU in presence of HOBt and the first amino acid was incorporated using MSNT. The conventional Fmoc synthetic protocol was used for the synthesis of peptides. The peptides were cleaved from the support using TFA. The peptides were purified by HPLC, and characterized by amino acid analysis and MALDI TOF MS. The secondary structures of the peptides were revealed by CD measurements. The synthesis of these peptides illustrates the utility of the new support for the synthesis of long-chain bioactive peptides. The synthetic peptides were tested for antimicrobial activity against Escherichia coli Mos blue, E. coli 2, Bacillus brevis, B. megaterium, Pseudomonas HTL, and Vibrio mimicus. The antibacterial activity of the peptides was explained on the basis of the helicity and charged nature of the sequences.
authors.affiliation: School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India.
authors.forename: M
authors.initials: M
authors.lastname: Roice
authors.forename: G
authors.initials: G
authors.lastname: Suma
authors.forename: K S
authors.initials: KS
authors.lastname: Kumar
authors.forename: V N
authors.initials: VN
authors.lastname: Pillai
mesh_terms: D000595:Amino Acid Sequence; D029845:Amphibian Proteins; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D023181:Antimicrobial Cationic Peptides / Q000737:chemistry* / Q000494:pharmacology; D001671:Biochemistry / Q000379:methods*; D003432:Cross-Linking Reagents / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000138:chemical synthesis* / Q000494:pharmacology*; D011137:Polystyrenes / Q000737:chemistry; D011487:Protein Conformation; D013329:Structure-Activity Relationship
chemical_list: D029845:Amphibian Proteins; D000890:Anti-Infective Agents; D023181:Antimicrobial Cationic Peptides; D003432:Cross-Linking Reagents; D008689:Methacrylates; D010446:Peptide Fragments; D011137:Polystyrenes; C092874:esculentin protein, Rana esculenta; C102737:1,4-butanediol dimethacrylate