Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4855
Number of amino acids:111
Molecular Weight:11959.2 Da
Theoretical pI:5.39


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.91%
Cysteine CYS (C)87.21%
Glutamic Acid GLU (E)87.21%
Aspartic Acid ASP (D)43.6%
Glycine GLY (G)87.21%
Phynylalanine PHE (F)43.6%
Isoleucine ILE (I)21.8%
Histidine HIS (H)00%
Lysine LYS (K)98.11%
Methionine MET (M)65.41%
Leucine LEU (L)1614.41%
Asparagine ASN (N)32.7%
Glutamine GLN (Q)32.7%
Proline PRO (P)32.7%
Serine SER (S)54.5%
Arginine ARG (R)21.8%
Threonine THR (T)98.11%
Tryptophan TRP (W)10.9%
Valine VAL (V)87.21%
Tyrosine TYR (Y)10.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC522
HydrogenH859
NitrogenN133
OxygenO157
SulphurS14

FormulaC522H859N133O157S14
Total Number of Atoms:1685


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.626,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.584,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.83, 17.12, 36.94]

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:94.054
Grand average of hydropathicity (GRAVY):0.34