Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4738
Number of amino acids:492
Molecular Weight:54610.37 Da
Theoretical pI:9.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)448.94%
Cysteine CYS (C)61.22%
Glutamic Acid GLU (E)153.05%
Aspartic Acid ASP (D)275.49%
Glycine GLY (G)428.54%
Phynylalanine PHE (F)255.08%
Isoleucine ILE (I)234.67%
Histidine HIS (H)142.85%
Lysine LYS (K)255.08%
Methionine MET (M)91.83%
Leucine LEU (L)469.35%
Asparagine ASN (N)193.86%
Glutamine GLN (Q)132.64%
Proline PRO (P)285.69%
Serine SER (S)428.54%
Arginine ARG (R)316.3%
Threonine THR (T)183.66%
Tryptophan TRP (W)81.63%
Valine VAL (V)326.5%
Tyrosine TYR (Y)255.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2473
HydrogenH3796
NitrogenN678
OxygenO694
SulphurS15

FormulaC2473H3796N678O694S15
Total Number of Atoms:7656


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81625
Absorption 0.1% (=1 g/l)    1.495,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81250
Absorption 0.1% (=1 g/l)    1.488,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.32, 26.63, 23.17]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:82.5
Grand average of hydropathicity (GRAVY):-0.19