• DRAMP ID

    • DRAMP03320
    • Peptide Name

    • Pore-forming peptide ameobapore A (EH-APP; saposin-like protein)
    • Source

    • Entamoeba histolytica (protozoan parasite)
    • Family

    • Not found
    • Gene

    • Not found
    • Sequence

    • GEILCNLCTGLINTLENLLTTKGADKVKDYISSLCNKASGFIATLCTKVLDFGIDKLIQLIEDKVDANAICAKIHAC
    • Sequence Length

    • 77
    • Protein Existence

    • Protein level
    • Biological Activity

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

      • Gram-positive bacteria: Micrococcus luteus (MIC=1.9 µM), Bacillus megaterium (MIC=13 µM), Bacillus subtilis (MIC=27 µM), Staphylococcus aureus (MIC>15 µM).
    • Hemolytic Activity

      • No hemolysis information or data found in the reference(s) presented in this entry
    • Cytotoxicity

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

    • Cell membrane
    • Linear/Cyclic

    • Cyclic
    • N-terminal Modification

    • Free
    • C-terminal Modification

    • Cyclization(Cys5 and Cys77).
    • Nonterminal Modifications and Unusual Amino Acids

    • Disulfide bonds between Cys5 and Cys77,Cys8 and Cys71,Cys35 and Cys46.
    • Stereochemistry

    • L
    • Structure

    • Alpha helix (5 helices; 53 residues)
    • Structure Description

    • Amoebapore A belongs to the superfamily of saposin-like proteins that are characterized by a conserved disulfide bond pattern and a fold consisting of five helices.(Ref.3)
    • Helical Wheel Diagram

    • DRAMP03320 helical wheel diagram
    • PDB ID

    • 1OF9 resolved by NMR.
  • 1OF9-> 
    • Predicted Structure

    • There is no predicted structure for DRAMP03320.
    • Formula

    • C362H605N93O112S6
    • Absent Amino Acids

    • MPRW
    • Common Amino Acids

    • L
    • Mass

    • 8244.7
    • PI

    • 5.65
    • Basic Residues

    • 9
    • Acidic Residues

    • 9
    • Hydrophobic Residues

    • 32
    • Net Charge

    • 0
    • Boman Index

    • -44.78
    • Hydrophobicity

    • 0.407
    • Aliphatic Index

    • 121.69
    • Half Life

      • Mammalian:30 hour
      • Yeast:>20 hour
      • E.coli:>10 hour
    • Extinction Coefficient Cystines

    • 1865
    • Absorbance 280nm

    • 24.54
    • Polar Residues

    • 26

DRAMP03320

DRAMP03320 chydropathy plot
    • Forms pores in the cytoplasmic membrane of host cells. Implicated in the cytolytic activity of the parasite.

  • ·Literature 1
    • Title

    • Amoebapores, a family of membranolytic peptides from cytoplasmic granules of Entamoeba histolytica: isolation, primary structure, and pore formation in bacterial cytoplasmic membranes.
    • Reference

    • Mol Microbiol. 1994 Dec;14(5):895-904.
    • Author

    • Leippe M, Andrä J, Nickel R, Tannich E, Müller-Eberhard HJ.
  • ·Literature 2
    • Title

    • Cytolytic and antibacterial activity of synthetic peptides derived from amoebapore, the pore-forming peptide of Entamoeba histolytica.
    • Reference

    • Proc Natl Acad Sci U S A. 1994 Mar 29;91(7):2602-2606.
    • Author

    • Leippe M, Andrä J, Müller-Eberhard HJ.
  • ·Literature 3
    • Title

    • Solution structure of the pore-forming protein of Entamoeba histolytica.
    • Reference

    • J Biol Chem. 2004 Apr 23;279(17):17834-41.
    • Author

    • Hecht O, Van Nuland NA, Schleinkofer K, Dingley AJ, Bruhn H, Leippe M, Grötzinger J.