Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3284
Number of amino acids:18
Molecular Weight:2247.63 Da
Theoretical pI:8.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)15.56%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)15.56%
Aspartic Acid ASP (D)15.56%
Glycine GLY (G)15.56%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)15.56%
Histidine HIS (H)15.56%
Lysine LYS (K)15.56%
Methionine MET (M)00%
Leucine LEU (L)422.22%
Asparagine ASN (N)15.56%
Glutamine GLN (Q)15.56%
Proline PRO (P)00%
Serine SER (S)00%
Arginine ARG (R)211.11%
Threonine THR (T)00%
Tryptophan TRP (W)211.11%
Valine VAL (V)15.56%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC104
HydrogenH163
NitrogenN31
OxygenO25
SulphurS0

FormulaC104H163N31O25S0
Total Number of Atoms:323


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    4.894
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.29

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.44, 11.11, 33.33]

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:130
Grand average of hydropathicity (GRAVY):-0.37