Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5649
Number of amino acids:486
Molecular Weight:53827.96 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)357.2%
Cysteine CYS (C)91.85%
Glutamic Acid GLU (E)326.58%
Aspartic Acid ASP (D)265.35%
Glycine GLY (G)408.23%
Phynylalanine PHE (F)112.26%
Isoleucine ILE (I)204.12%
Histidine HIS (H)183.7%
Lysine LYS (K)295.97%
Methionine MET (M)163.29%
Leucine LEU (L)438.85%
Asparagine ASN (N)255.14%
Glutamine GLN (Q)102.06%
Proline PRO (P)255.14%
Serine SER (S)347%
Arginine ARG (R)173.5%
Threonine THR (T)285.76%
Tryptophan TRP (W)40.82%
Valine VAL (V)357.2%
Tyrosine TYR (Y)295.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2386
HydrogenH3697
NitrogenN641
OxygenO729
SulphurS25

FormulaC2386H3697N641O729S25
Total Number of Atoms:7478


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65710
Absorption 0.1% (=1 g/l)    1.221,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65210
Absorption 0.1% (=1 g/l)    1.211,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.22, 25.51, 25.93]

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:78.642
Grand average of hydropathicity (GRAVY):-0.35