Peptide Database

Peptide NameSerine proteinase inhibitor PI-4

Function Ontology

Other / Curated residual function label ▸ Generic enzyme inhibition annotation

Standard StatusStandard

Sequence Length38 amino acids

Chemical FormulaC163H273N53O57S6

DescriptionStandard

        QAQQCTPNKSFKKDCNTCTCNKDGTAAICTQIACLNRG
    

Molecular Weight4079.62 Da

Isoelectric Point (pI)8.66

Net Charge (pH 7.0)2.70

Net Charge (pH 7.4) 2.40

Charge Density (pH 7.0) 0.0710

GRAVY Index-0.63

Hydrophobic Moment 0.46

Boman Index-0.18

Instability Index55.01

Aliphatic Index 41.32

Aromaticity 0.0263

Extinction Coeff. Reduced 0.00

Extinction Coeff. Oxidized 375.00

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

Amino Acid Composition

TPSA 1837.91

LogP -28.67

H-bond Donors 67.0

H-bond Acceptors 66.0

Rotatable Bonds 138.0

Heavy Atoms 279.0

Ring Count 2.0

Amide Bonds 45.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0402133 VERIFIED: NO

Provenance & Taxonomy

OrganismLocusta migratoria [Animal]

Tax ID7004

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

Bio-Activity Profile

Function

Enzyme inhibitory