• Title/Summary/Keyword: Conjugates

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Characterization of Antibacterial Activity and Synergistic Effect of Cationic Antibacterial Peptide-resin Conjugates

  • Kim, Jeong-Min;Jang, Su-Jung;Yang, Mi-Hwa;Cho, Hyeong-Jin;Lee, Keun-Hyeung
    • Bulletin of the Korean Chemical Society
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    • v.32 no.11
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    • pp.3928-3932
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    • 2011
  • We synthesized peptide-resin conjugates (1 and 2) by immobilizing ${\beta}$-sheet antibacterial peptide and ${\alpha}$ helical antibacterial peptide on PEG-PS resin, respectively. Conjugate 1 showed considerable antibacterial activity in various conditions, whereas conjugate 2 did not exhibit antibacterial activity. The growths of various bacteria were inhibited by conjugate 1 even at lower concentrations than MIC. Conjugate 1 killed bacteria at MIC and had a potent synergistic effect with current antibacterial agents such as vancomycin and tetracycline, respectively. Overall results indicate that polymer surface modification using antibacterial ${\beta}$ sheet peptide is a powerful way to prevent microbial contamination on polymer surfaces.

Synthesis of Small Molecule-Peptide Conjugates as Potential Whitening Agents

  • Lee, Hye-Suk;Shin, Kyong-Hoon;Ryu, Geun-Seok;Chi, Gyeong-Yup;Cho, In-Shik;Kim, Han-Young
    • Bulletin of the Korean Chemical Society
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    • v.33 no.9
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    • pp.3004-3008
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    • 2012
  • Small molecule conjugated peptides were prepared by solid-phase synthesis as potential novel whitening agents, and their melanogenesis inhibitory activities were investigated. The conjugated small molecules were well-known materials as tyrosinase inhibitors, and peptides were selected from the sequences that are known to antagonize melanocortin receptor 1 (MC1R). Most of small molecules-peptide conjugates showed superior melanin inhibition activity to kojic acid and arbutin. Among these, almost all compounds have -AR- sequence. From this study, we concluded that the small molecule conjugated peptides containing -AR- sequence have melanogenesis inhibitory activities and have potential to be used as novel whitening agents.