Peptide Database

Peptide NamePotassium channel toxin kappa-KTx 3.3

Function Ontology

Venom / Toxin ▸ General toxin ▸ Toxin

Standard StatusStandard

Sequence Length25 amino acids

Chemical FormulaC127H193N33O36S5

DescriptionStandard

        QWINACFNICMKISSDQKYCKSFCG
    

Molecular Weight2918.42 Da

Isoelectric Point (pI)8.50

Net Charge (pH 7.0)1.72

Net Charge (pH 7.4) 1.45

Charge Density (pH 7.0) 0.0687

GRAVY Index-0.06

Hydrophobic Moment 0.46

Boman Index0.05

Instability Index62.10

Aliphatic Index 50.80

Aromaticity 0.1600

Extinction Coeff. Reduced 6990.00

Extinction Coeff. Oxidized 7240.00

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

Amino Acid Composition

TPSA 1146.15

LogP -11.43

H-bond Donors 43.0

H-bond Acceptors 43.0

Rotatable Bonds 97.0

Heavy Atoms 201.0

Ring Count 5.0

Amide Bonds 28.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0386982 VERIFIED: NO

Provenance & Taxonomy

OrganismHeterometrus petersii [Animal]

Structure & Mods

Configlinear disulfide-stabilized peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

Disulfide6-24, 10-20

Bio-Activity Profile

Function

Toxin

TargetPotassium channel inhibitor