Peptide Database

Peptide NamePotassium channel toxin kappa-KTx 4.1

Function Ontology

Venom / Toxin ▸ General toxin ▸ Toxin

Standard StatusStandard

Sequence Length25 amino acids

Chemical FormulaC139H220N36O33S5

DescriptionStandard

        DIPCFETCMKLYHIPKLCYIKCRKH
    

Molecular Weight3083.78 Da

Isoelectric Point (pI)8.85

Net Charge (pH 7.0)2.89

Net Charge (pH 7.4) 2.52

Charge Density (pH 7.0) 0.1157

GRAVY Index-0.17

Hydrophobic Moment 0.37

Boman Index-0.04

Instability Index29.64

Aliphatic Index 78.00

Aromaticity 0.1200

Extinction Coeff. Reduced 2980.00

Extinction Coeff. Oxidized 3230.00

The radar chart summarizes major physicochemical dimensions for quick comparison, while exact numerical values remain listed on the left.

Amino Acid Composition

TPSA 1102.77

LogP -4.68

H-bond Donors 42.0

H-bond Acceptors 43.0

Rotatable Bonds 100.0

Heavy Atoms 213.0

Ring Count 7.0

Amide Bonds 24.0

3D PDB MODEL

Drag to rotate. Click a residue or atom to inspect it; the selected residue is highlighted in amber in the current view mode. Use the buttons to zoom.

2D CHEMICAL STRUCTURE

Drag to move

Drag to move. Use the buttons to zoom.

RECORD: Rec_0167708 VERIFIED: NO

Provenance & Taxonomy

OrganismHeterometrus petersii [Animal]

Structure & Mods

Configlinear disulfide-stabilized peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

Disulfide4-22, 8-18

Bio-Activity Profile

Function

Toxin

TargetPotassium channel inhibitor