Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4788
Number of amino acids:364
Molecular Weight:38693.06 Da
Theoretical pI:5.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4111.26%
Cysteine CYS (C)113.02%
Glutamic Acid GLU (E)123.3%
Aspartic Acid ASP (D)215.77%
Glycine GLY (G)277.42%
Phynylalanine PHE (F)195.22%
Isoleucine ILE (I)102.75%
Histidine HIS (H)20.55%
Lysine LYS (K)154.12%
Methionine MET (M)102.75%
Leucine LEU (L)3910.71%
Asparagine ASN (N)256.87%
Glutamine GLN (Q)123.3%
Proline PRO (P)133.57%
Serine SER (S)287.69%
Arginine ARG (R)154.12%
Threonine THR (T)318.52%
Tryptophan TRP (W)20.55%
Valine VAL (V)277.42%
Tyrosine TYR (Y)41.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1687
HydrogenH2699
NitrogenN467
OxygenO531
SulphurS21

FormulaC1687H2699N467O531S21
Total Number of Atoms:5405


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17585
Absorption 0.1% (=1 g/l)    0.454,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    0.438,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 20.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.75, 25.55, 28.02]

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:85.2747
Grand average of hydropathicity (GRAVY):0.06