Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5759
Number of amino acids:324
Molecular Weight:36728.01 Da
Theoretical pI:5.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)226.79%
Cysteine CYS (C)92.78%
Glutamic Acid GLU (E)185.56%
Aspartic Acid ASP (D)185.56%
Glycine GLY (G)226.79%
Phynylalanine PHE (F)144.32%
Isoleucine ILE (I)216.48%
Histidine HIS (H)30.93%
Lysine LYS (K)164.94%
Methionine MET (M)51.54%
Leucine LEU (L)3711.42%
Asparagine ASN (N)144.32%
Glutamine GLN (Q)134.01%
Proline PRO (P)175.25%
Serine SER (S)237.1%
Arginine ARG (R)164.94%
Threonine THR (T)164.94%
Tryptophan TRP (W)72.16%
Valine VAL (V)144.32%
Tyrosine TYR (Y)195.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1665
HydrogenH2554
NitrogenN428
OxygenO482
SulphurS14

FormulaC1665H2554N428O482S14
Total Number of Atoms:5143


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67310
Absorption 0.1% (=1 g/l)    1.833,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66810
Absorption 0.1% (=1 g/l)    1.819,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.28

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.57, 23.46, 25.31]

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:89.136
Grand average of hydropathicity (GRAVY):-0.17