General Information

    • DRAMP ID

    • DRAMP21568

    • Peptide Name

    • MP1S-Q12K

    • Sequence

    • IDWKKⓍLDAⓍKKIL

    • Sequence Length

    • 14

    • Original Sequence

    • IDWKKLLDAAKQIL

    • Source

    • Synthetic construct

Activity Information

    • Biological Activity

    • Antimicrobial, Antibacterial, Anti-Gram+

    • Comments

    • Function: Antibacterial activity against Gram-positive and Gram-negative bacteria.

    • Target Organism

      • [Ref.29075946] Gram-positive bacteria: Bacillus subtilis (MIC = 0.8 μg/mL), Staphylococcus aureus (MIC = 1.2 μg/mL), Staphylococcus epidermidis (MIC = 50 μg/mL);
      • Gram-negative bacteria: Escherichia coli (MIC >100 μg/mL), Shigella dysenteriae (MIC > 100 μg/mL), Salmonella typhimurium (MIC > 100 μg/mL), Klebsiella pneumoniae (MIC > 100 μg/mL), Pseudomonas aeruginosa (MIC > 100 μg/mL)

    • Hemolytic Activity

      • [Ref.29075946] It has 9.6% hemolysis against human red blood cells at 12.5 μM and 13.9% hemolysis at 25 μM.

    • Cytotoxicity

    • No cytotoxicity information found in the reference(s) presented

Structure Information

    • Linear/Cyclic

    • Cyclic (Stapled)

    • N-terminal Modification

    • Free

    • C-terminal Modification

    • Amidation

    • Special Amino Acid and Stapling Position

    • ①The Ⓧ (position: 6 and 10) in sequence indicates (S)-α-methyl, α-pentenylglycine. ②Ⓧ (6) and Ⓧ (10) are cross-linked by hydrocarbon stapling through an oct-4-enyl hydrocarbon staple.

    • Stereochemistry

    • L

    • Secondary Structure

    • 81.8% α-helical content in a 25 mM potassium phosphate buffer solution at 20℃

    • Structure Description

    • ①Helical contents of all stapled analogues were increased by more than a three-fold compared to their unmodified counterpart, MP1. ②MP1S-D8N and MP1S-Q12K showed slightly lower helical contents (89.4% and 81.8, respectively).

    • Helical Wheel Diagram

    • DRAMP21568 helical wheel diagram

    • Predicted Structure

Literature Information

  • Literature 1

    • Title

    • Antimicrobial activity and stability of stapled helices of polybia-MP1

    • Reference

    • Arch Pharm Res. 2017 Dec;40(12):1414-1419. doi: 10.1007/s12272-017-0963-5. Epub 2017 Oct 26.

    • Author

    • Huy X Luong, Do-Hee Kim, Bong-Jin Lee, Young-Woo Kim