Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6083
Number of amino acids:305
Molecular Weight:34015.39 Da
Theoretical pI:4.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.26%
Cysteine CYS (C)134.26%
Glutamic Acid GLU (E)165.25%
Aspartic Acid ASP (D)154.92%
Glycine GLY (G)82.62%
Phynylalanine PHE (F)196.23%
Isoleucine ILE (I)154.92%
Histidine HIS (H)20.66%
Lysine LYS (K)72.3%
Methionine MET (M)82.62%
Leucine LEU (L)3110.16%
Asparagine ASN (N)123.93%
Glutamine GLN (Q)134.26%
Proline PRO (P)247.87%
Serine SER (S)5016.39%
Arginine ARG (R)154.92%
Threonine THR (T)237.54%
Tryptophan TRP (W)10.33%
Valine VAL (V)92.95%
Tyrosine TYR (Y)113.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1495
HydrogenH2315
NitrogenN387
OxygenO477
SulphurS21

FormulaC1495H2315N387O477S21
Total Number of Atoms:4695


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22640
Absorption 0.1% (=1 g/l)    0.666,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.644,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 65.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.20, 30.82, 22.30]

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:71.6392
Grand average of hydropathicity (GRAVY):-0.21