Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5017
Number of amino acids:459
Molecular Weight:52231.43 Da
Theoretical pI:5.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)224.79%
Cysteine CYS (C)10.22%
Glutamic Acid GLU (E)459.8%
Aspartic Acid ASP (D)245.23%
Glycine GLY (G)235.01%
Phynylalanine PHE (F)245.23%
Isoleucine ILE (I)265.66%
Histidine HIS (H)81.74%
Lysine LYS (K)316.75%
Methionine MET (M)40.87%
Leucine LEU (L)4610.02%
Asparagine ASN (N)357.63%
Glutamine GLN (Q)347.41%
Proline PRO (P)194.14%
Serine SER (S)418.93%
Arginine ARG (R)265.66%
Threonine THR (T)143.05%
Tryptophan TRP (W)00%
Valine VAL (V)275.88%
Tyrosine TYR (Y)91.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2294
HydrogenH3647
NitrogenN653
OxygenO731
SulphurS5

FormulaC2294H3647N653O731S5
Total Number of Atoms:7330


Total number of positively charged residues (ARG + LYS):57
Total number of negatively charged residues (ASP + GLU):69
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.257,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.257,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.76, 25.71, 25.49]

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:83.0284
Grand average of hydropathicity (GRAVY):-0.69