General Information

    • DRAMP ID

    • DRAMP00336

    • Peptide Name

    • ChaC7 (Chassatide C7; uncyclotides; Plant defensin)

    • Source

    • Chassalia chartacea

    • Family

    • Belongs to the Bracelet subfamily, Rubiaceae family

    • Gene

    • Not found

    • Sequence

    • IPCGESCVWIPCITAIAGCSCKNKVCYT

    • Sequence Length

    • 28

    • UniProt Entry

    • No entry found

    • Protein Existence

    • Not found

Activity Information

    • Biological Activity

    • Antimicrobial, Antibacterial, Anti-Gram+, Anti-Gram-

    • Target Organism

      • Gram-negative bacterium: Escherichia coli (MIC=6.4 µM);
      • Gram-positive bacteria: Staphylococcus aureus (MIC>80 µM), Staphylococcus epidermidis (MIC>80 µM).

    • Hemolytic Activity

      • [Ref.22467870] HD50 = 11.6 μM against on human red blood cells (Type A). Kalata B1 and melittin were used as the positive control.

    • Cytotoxicity

      • [Ref.22467870] IC50 = 1.2 μM targeting on HeLa cells. Kalata B1 was used as the positive control.

    • Binding Target

    • Not found

Structure Information

    • Linear/Cyclic

    • Linear

    • N-terminal Modification

    • Free

    • C-terminal Modification

    • Free

    • Nonterminal Modifications and Unusual Amino Acids

    • None

    • Stereochemistry

    • L

    • Structure

    • Not found

    • Structure Description

    • Not found

    • Helical Wheel Diagram

    • DRAMP00336 helical wheel diagram

    • PDB ID

    • None

    • Predicted Structure

Physicochemical Information

    • Formula

    • C127H204N32O37S6

    • Absent Amino Acids

    • DFHLMQR

    • Common Amino Acids

    • C

    • Mass

    • 2963.57

    • PI

    • 7.77

    • Basic Residues

    • 2

    • Acidic Residues

    • 1

    • Hydrophobic Residues

    • 9

    • Net Charge

    • +1

    • Boman Index

    • 6.64

    • Hydrophobicity

    • 0.75

    • Aliphatic Index

    • 83.57

    • Half Life

      • Mammalian:20 hour
      • Yeast:30 min
      • E.coli:>10 hour

    • Extinction Coefficient Cystines

    • 7365

    • Absorbance 280nm

    • 272.78

    • Polar Residues

    • 14

DRAMP00336

DRAMP00336 chydropathy plot

Comments Information

    • IC50=1.2 µM, HD50=11.6 µM.

    • Note

    • IC50 (concentration that gives a survival index of 50%) and HD50 (concentration that causes 50% lysis of red blood cells).

Literature Information

  • ·Literature 1

    • Title

    • Novel Cyclotides and Uncyclotides with Highly Shortened Precursors from Chassalia chartacea and Effects of Methionine Oxidation on Bioactivities.

    • Reference

    • J Biol Chem. 2012 May 18;287(21):17598-17607.

    • Author

    • Nguyen GK, Lim WH, Nguyen PQ, Tam JP.