General Information
-
DRAMP ID
- DRAMP03999
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Peptide Name
- [A6]-IsCT (Mutant: W6A; 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
- ILGKIAEGIKSLF
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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
-
- [Ref.15369808]Gram-negative bacteria: Escherichia coli KCTC 1682 (MIC=64 µM), Pseudomonas aeruginosa KCTC 1637 (MIC=32 µM), Salmonella typhimurium KCTC 1926 (MIC>64 µM);
- Gram-positive bacteria: Staphylococcus epidermidis KCTC 1917 (MIC>64 µM), Staphylococcus aureus KCTC 1621 (MIC>64 µM).
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Hemolytic Activity
-
- [Ref.15369808]Non-hemolytic activity
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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
-
PDB ID
- None
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Predicted Structure
- Please click DRAMP03999_predicted_structure.pdb to download.
Physicochemical Information
-
Formula
- C66H113N15O17
Absent Amino Acids
- CDHMNPQRTVWY
Common Amino Acids
- I
Mass
- 1388.71
PI
- 8.59
Basic Residues
- 2
Acidic Residues
- 1
Hydrophobic Residues
- 7
Net Charge
- +1
-
Boman Index
- 9.96
Hydrophobicity
- 0.985
Aliphatic Index
- 157.69
Half Life
-
- Mammalian:20 hour
- Yeast:30 min
- E.coli:>10 hour
Extinction Coefficient Cystines
- 0
Absorbance 280nm
- 0
Polar Residues
- 3
DRAMP03999
Comments Information
Function
- [A6]-IsCT did not cause any hemolysis at peptide concentrations as high as 100 µM, indicating that Trp6 is important for both the hemolytic activity and antibacterial activity of IsCT.
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.