Peptide Database

Peptide NameCystatin-9 (Testatin)

Function Ontology

Antimicrobial

Antimicrobial ▸ Antibacterial ▸ Anti-Gram-negative

Enzyme modulation ▸ Enzyme inhibition ▸ Protease inhibition

Other / Curated residual function label ▸ Generic enzyme inhibition annotation

Toxicity / Safety ▸ Negative safety assay result ▸ Non-hemolytic

Standard StatusStandard

Sequence Length137 amino acids

Chemical FormulaC730H1137N191O199S10

DescriptionStandard

        MSCPLRKKALPLTMLLLLLSFHVLITPVSKANKETNRSVHFIPTVEFAVNTFNQESQDEYAYRMEHIMSSWREKVNFPTVYSMRLQLRRTICKKFEESLDICPFQESHGLNNTFTCLFTVGTYPWITKFKLFRSVCS
    

Molecular Weight16093.65 Da

Isoelectric Point (pI)9.22

Net Charge (pH 7.0)5.81

Net Charge (pH 7.4) 5.29

Charge Density (pH 7.0) 0.0424

GRAVY Index-0.12

Hydrophobic Moment 0.64

Boman Index0.02

Instability Index54.96

Aliphatic Index 81.75

Aromaticity 0.1241

Extinction Coeff. Reduced 16960.00

Extinction Coeff. Oxidized 17210.00

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

Amino Acid Composition

TPSA 6285.80

LogP -53.06

H-bond Donors 225.0

H-bond Acceptors 219.0

Rotatable Bonds 528.0

Heavy Atoms 1130.0

Ring Count 30.0

Amide Bonds 147.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0025976 VERIFIED: YES

Provenance & Taxonomy

OrganismMus musculus [Animal]

FamilyCystatin

Tax ID10090

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

Bio-Activity Profile

Function

Antimicrobial Anti-Gram-negative Protease inhibitor Thiol protease inhibitor Enzyme inhibitory Non-hemolytic

TargetFrancisella tularensis

RECORD: Rec_0247986 VERIFIED: NO