Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3854
Number of amino acids:45
Molecular Weight:5022.63 Da
Theoretical pI:8.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.44%
Cysteine CYS (C)817.78%
Glutamic Acid GLU (E)24.44%
Aspartic Acid ASP (D)36.67%
Glycine GLY (G)613.33%
Phynylalanine PHE (F)24.44%
Isoleucine ILE (I)12.22%
Histidine HIS (H)12.22%
Lysine LYS (K)24.44%
Methionine MET (M)00%
Leucine LEU (L)12.22%
Asparagine ASN (N)36.67%
Glutamine GLN (Q)12.22%
Proline PRO (P)00%
Serine SER (S)24.44%
Arginine ARG (R)511.11%
Threonine THR (T)36.67%
Tryptophan TRP (W)12.22%
Valine VAL (V)12.22%
Tyrosine TYR (Y)12.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC202
HydrogenH315
NitrogenN69
OxygenO66
SulphurS8

FormulaC202H315N69O66S8
Total Number of Atoms:660


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):5
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)    1.491,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.392,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[15.56, 24.44, 11.11]

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:28.2222
Grand average of hydropathicity (GRAVY):-0.70