Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6070
Number of amino acids:135
Molecular Weight:15063.46 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)85.93%
Cysteine CYS (C)10.74%
Glutamic Acid GLU (E)53.7%
Aspartic Acid ASP (D)85.93%
Glycine GLY (G)64.44%
Phynylalanine PHE (F)75.19%
Isoleucine ILE (I)96.67%
Histidine HIS (H)32.22%
Lysine LYS (K)32.22%
Methionine MET (M)53.7%
Leucine LEU (L)1813.33%
Asparagine ASN (N)42.96%
Glutamine GLN (Q)10.74%
Proline PRO (P)118.15%
Serine SER (S)1712.59%
Arginine ARG (R)64.44%
Threonine THR (T)75.19%
Tryptophan TRP (W)53.7%
Valine VAL (V)96.67%
Tyrosine TYR (Y)21.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC691
HydrogenH1066
NitrogenN172
OxygenO193
SulphurS6

FormulaC691H1066N172O193S6
Total Number of Atoms:2128


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30480
Absorption 0.1% (=1 g/l)    2.023,   assuming all pairs of CYS residues form cystines

Ext. coefficient    30480
Absorption 0.1% (=1 g/l)    2.023,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.04, 28.15, 26.67]

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:103.259
Grand average of hydropathicity (GRAVY):0.27