Peptide Database

Peptide NameSIFamide I/II

Function Ontology

Neurological / Signaling ▸ Neuropeptide activity ▸ Neuropeptide

Standard StatusStandard

Sequence Length8 amino acids

Chemical FormulaC43H59N9O11

DescriptionStandard

        PPFNGSIF
    

Molecular Weight877.98 Da

Isoelectric Point (pI)5.96

Net Charge (pH 7.0)-0.04

Net Charge (pH 7.4) -0.10

Charge Density (pH 7.0) -0.0052

GRAVY Index0.28

Hydrophobic Moment 0.14

Boman Index0.44

Instability Index38.11

Aliphatic Index 48.75

Aromaticity 0.2500

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 307.56

LogP -2.25

H-bond Donors 10.0

H-bond Acceptors 11.0

Rotatable Bonds 23.0

Heavy Atoms 63.0

Ring Count 4.0

Amide Bonds 8.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0075008 VERIFIED: NO

Provenance & Taxonomy

OrganismSymphylella vulgaris [Animal] [Animal]; Lygus hesperus [Animal]

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

C-TermAmidation

Bio-Activity Profile

Function

Neuropeptide