General Information
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DRAMP ID
- DRAMP04001
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Peptide Name
- [K7]-IsCT (Mutant: E7K; IsCT analog)
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Source
- Synthetic construct
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Family
- Not found
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Gene
- Not found
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Sequence
- ILGKIWKGIKSLF
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Sequence Length
- 13
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UniProt Entry
- No entry found
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Protein Existence
- Synthetic
Activity Information
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Biological Activity
- Antimicrobial, Antibacterial, Anti-Gram+, Anti-Gram-
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Target Organism
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- Gram-negative bacteria: Escherichia coli KCTC 1682 (MIC=2 µM), Pseudomonas aeruginosa KCTC 1637 (MIC=2 µM), Salmonella typhimurium KCTC 1926 (MIC=1 µM);
- Gram-positive bacteria: Staphylococcus epidermidis KCTC 1917 (MIC=1 µM), Staphylococcus aureus KCTC 1621 (MIC=1 µM)
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Hemolytic Activity
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- No hemolysis information or data found in the reference(s) presented in this entry
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Cytotoxicity
-
- Not included yet
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Binding Target
- Cell membrane
Structure Information
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Linear/Cyclic
- Not included yet
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N-terminal Modification
- Not included yet
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C-terminal Modification
- Not included yet
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Nonterminal Modifications and Unusual Amino Acids
- Not included yet
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Stereochemistry
- Not included yet
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Structure
- Not found
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Structure Description
- Not found
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Helical Wheel Diagram
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PDB ID
- None
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Predicted Structure
- Please click DRAMP04001_predicted_structure.pdb to download.
Physicochemical Information
-
Formula
- C75H123N17O15
Absent Amino Acids
- ACDEHMNPQRTVY
Common Amino Acids
- IK
Mass
- 1502.91
PI
- 10.3
Basic Residues
- 3
Acidic Residues
- 0
Hydrophobic Residues
- 7
Net Charge
- +3
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Boman Index
- 11.74
Hydrophobicity
- 0.746
Aliphatic Index
- 150
Half Life
-
- Mammalian:20 hour
- Yeast:30 min
- E.coli:>10 hour
Extinction Coefficient Cystines
- 5500
Absorbance 280nm
- 458.33
Polar Residues
- 3
DRAMP04001
Comments Information
Function
- [K7]-IsCT displays a similar or 2-fold increase in antibacterial activity against both Gram-positive and Gram-negative bacteria, and complete loss of hemolysis activity.
Chemical modification
- C-terminal amidation.
Literature Information
- ·Literature 1
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Title
- Antibiotic activity and structural analysis of the scorpion-derived antimicrobial peptide IsCT and its analogs.
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Pubmed ID
- 15369808
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Reference
- Biochem Biophys Res Commun. 2004 Oct 15;323(2):712-719.
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Author
- Lee K, Shin SY, Kim K, Lim SS, Hahm KS, Kim Y.