Peptide Database

Peptide NameBarley peptide B18

Function Ontology

Immunology ▸ Immunomodulation ▸ Celiac-immunogenic

Standard StatusStandard

Sequence Length12 amino acids

Chemical FormulaC66H100N16O17

DescriptionStandard

        QPQPFPQQPIPL
    

Molecular Weight1389.60 Da

Isoelectric Point (pI)5.53

Net Charge (pH 7.0)-0.24

Net Charge (pH 7.4) -0.44

Charge Density (pH 7.0) -0.0200

GRAVY Index-0.91

Hydrophobic Moment 0.25

Boman Index0.07

Instability Index135.17

Aliphatic Index 65.00

Aromaticity 0.0833

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 511.83

LogP -3.34

H-bond Donors 12.0

H-bond Acceptors 17.0

Rotatable Bonds 36.0

Heavy Atoms 99.0

Ring Count 6.0

Amide Bonds 15.0

3D PDB MODEL

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2D CHEMICAL STRUCTURE

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RECORD: Rec_0036880 VERIFIED: YES

Provenance & Taxonomy

OrganismHordeum vulgare [Plant]

FamilyHordein

Tax ID4513

Structure & Mods

Configlinear peptide [Linear]

Chiralitycanonical L-amino-acid peptide [L]

Other ModsReported substitutions/positions: B18

Bio-Activity Profile

Function

Celiac-immunogenic

TargetHuman intestinal T cells / HLA-DQ2

MethodIntestinal T-cell assay