Peptide Database

Peptide NameSIFamide

Function Ontology

Neurological / Signaling ▸ Neuropeptide activity ▸ Neuropeptide

Standard StatusStandard

Sequence Length11 amino acids

Chemical FormulaC57H86N16O14

DescriptionStandard

        GRKPPFNGSIF
    

Molecular Weight1219.39 Da

Isoelectric Point (pI)11.00

Net Charge (pH 7.0)1.76

Net Charge (pH 7.4) 1.55

Charge Density (pH 7.0) 0.1599

GRAVY Index-0.60

Hydrophobic Moment 0.22

Boman Index-0.00

Instability Index23.59

Aliphatic Index 35.45

Aromaticity 0.1818

Extinction Coeff. Reduced 0.00

Extinction Coeff. Oxidized 0.00

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

Amino Acid Composition

TPSA 487.98

LogP -4.69

H-bond Donors 16.0

H-bond Acceptors 16.0

Rotatable Bonds 36.0

Heavy Atoms 87.0

Ring Count 4.0

Amide Bonds 11.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0265310 VERIFIED: NO

Provenance & Taxonomy

OrganismLatrodectus hesperus [Animal]

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

C-TermAmidation

Bio-Activity Profile

Function

Neuropeptide