Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5620
Number of amino acids:166
Molecular Weight:13838.24 Da
Theoretical pI:9.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)74.22%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)21.2%
Aspartic Acid ASP (D)10.6%
Glycine GLY (G)9154.82%
Phynylalanine PHE (F)10.6%
Isoleucine ILE (I)31.81%
Histidine HIS (H)10.6%
Lysine LYS (K)53.01%
Methionine MET (M)10.6%
Leucine LEU (L)63.61%
Asparagine ASN (N)63.61%
Glutamine GLN (Q)63.61%
Proline PRO (P)00%
Serine SER (S)1810.84%
Arginine ARG (R)31.81%
Threonine THR (T)10.6%
Tryptophan TRP (W)00%
Valine VAL (V)31.81%
Tyrosine TYR (Y)116.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC565
HydrogenH856
NitrogenN194
OxygenO215
SulphurS1

FormulaC565H856N194O215S1
Total Number of Atoms:1831


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16390
Absorption 0.1% (=1 g/l)    1.184
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.65

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.46, 69.28, 9.64]

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:30.6024
Grand average of hydropathicity (GRAVY):-0.53