Peptide Database

Peptide NameSIFamide

Function Ontology

Neurological / Signaling ▸ Neuropeptide activity ▸ Neuropeptide

Standard StatusStandard

Sequence Length13 amino acids

Chemical FormulaC70H102N16O19

DescriptionStandard

        SYKSKPPFNGSIF
    

Molecular Weight1471.65 Da

Isoelectric Point (pI)9.70

Net Charge (pH 7.0)1.46

Net Charge (pH 7.4) 1.25

Charge Density (pH 7.0) 0.1121

GRAVY Index-0.65

Hydrophobic Moment 0.17

Boman Index0.03

Instability Index21.50

Aliphatic Index 30.00

Aromaticity 0.2308

Extinction Coeff. Reduced 1490.00

Extinction Coeff. Oxidized 1490.00

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

Amino Acid Composition

TPSA 570.99

LogP -5.55

H-bond Donors 19.0

H-bond Acceptors 21.0

Rotatable Bonds 44.0

Heavy Atoms 105.0

Ring Count 5.0

Amide Bonds 13.0

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_0085205 VERIFIED: NO

Provenance & Taxonomy

OrganismArgulus siamensis [Animal]

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

C-TermAmidation

Bio-Activity Profile

Function

Neuropeptide