Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4775
Number of amino acids:782
Molecular Weight:87120.14 Da
Theoretical pI:7.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)394.99%
Cysteine CYS (C)111.41%
Glutamic Acid GLU (E)506.39%
Aspartic Acid ASP (D)334.22%
Glycine GLY (G)324.09%
Phynylalanine PHE (F)465.88%
Isoleucine ILE (I)303.84%
Histidine HIS (H)172.17%
Lysine LYS (K)364.6%
Methionine MET (M)172.17%
Leucine LEU (L)8811.25%
Asparagine ASN (N)364.6%
Glutamine GLN (Q)243.07%
Proline PRO (P)668.44%
Serine SER (S)10813.81%
Arginine ARG (R)476.01%
Threonine THR (T)394.99%
Tryptophan TRP (W)60.77%
Valine VAL (V)455.75%
Tyrosine TYR (Y)121.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3876
HydrogenH6099
NitrogenN1059
OxygenO1168
SulphurS28

FormulaC3876H6099N1059O1168S28
Total Number of Atoms:12230


Total number of positively charged residues (ARG + LYS):83
Total number of negatively charged residues (ASP + GLU):83
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51505
Absorption 0.1% (=1 g/l)    0.591,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    0.584,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 67.31

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.03, 30.95, 24.81]

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:80.5243
Grand average of hydropathicity (GRAVY):-0.31