Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4287
Number of amino acids:275
Molecular Weight:30279.87 Da
Theoretical pI:5.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.64%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)134.73%
Aspartic Acid ASP (D)134.73%
Glycine GLY (G)165.82%
Phynylalanine PHE (F)217.64%
Isoleucine ILE (I)155.45%
Histidine HIS (H)51.82%
Lysine LYS (K)155.45%
Methionine MET (M)20.73%
Leucine LEU (L)176.18%
Asparagine ASN (N)186.55%
Glutamine GLN (Q)82.91%
Proline PRO (P)93.27%
Serine SER (S)279.82%
Arginine ARG (R)51.82%
Threonine THR (T)3211.64%
Tryptophan TRP (W)51.82%
Valine VAL (V)248.73%
Tyrosine TYR (Y)93.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1375
HydrogenH2086
NitrogenN346
OxygenO422
SulphurS2

FormulaC1375H2086N346O422S2
Total Number of Atoms:4231


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.351
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.28

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.09, 25.45, 19.27]

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:78.3273
Grand average of hydropathicity (GRAVY):-0.10