Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4210
Number of amino acids:216
Molecular Weight:23903.96 Da
Theoretical pI:5.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.41%
Cysteine CYS (C)41.85%
Glutamic Acid GLU (E)104.63%
Aspartic Acid ASP (D)136.02%
Glycine GLY (G)136.02%
Phynylalanine PHE (F)125.56%
Isoleucine ILE (I)125.56%
Histidine HIS (H)31.39%
Lysine LYS (K)94.17%
Methionine MET (M)31.39%
Leucine LEU (L)177.87%
Asparagine ASN (N)188.33%
Glutamine GLN (Q)41.85%
Proline PRO (P)125.56%
Serine SER (S)188.33%
Arginine ARG (R)104.63%
Threonine THR (T)136.02%
Tryptophan TRP (W)20.93%
Valine VAL (V)188.33%
Tyrosine TYR (Y)94.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1068
HydrogenH1647
NitrogenN285
OxygenO325
SulphurS7

FormulaC1068H1647N285O325S7
Total Number of Atoms:3332


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24660
Absorption 0.1% (=1 g/l)    1.032,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24410
Absorption 0.1% (=1 g/l)    1.021,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.41, 28.24, 21.30]

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:83.9352
Grand average of hydropathicity (GRAVY):-0.17