Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5621
Number of amino acids:165
Molecular Weight:13536 Da
Theoretical pI:9.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)74.24%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)10.61%
Aspartic Acid ASP (D)00%
Glycine GLY (G)9456.97%
Phynylalanine PHE (F)10.61%
Isoleucine ILE (I)31.82%
Histidine HIS (H)10.61%
Lysine LYS (K)63.64%
Methionine MET (M)10.61%
Leucine LEU (L)63.64%
Asparagine ASN (N)53.03%
Glutamine GLN (Q)63.64%
Proline PRO (P)00%
Serine SER (S)1710.3%
Arginine ARG (R)21.21%
Threonine THR (T)10.61%
Tryptophan TRP (W)00%
Valine VAL (V)31.82%
Tyrosine TYR (Y)116.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC555
HydrogenH842
NitrogenN190
OxygenO208
SulphurS1

FormulaC555H842N190O208S1
Total Number of Atoms:1796


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):1
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)    1.211
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.65

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.55, 70.30, 9.09]

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:30.7878
Grand average of hydropathicity (GRAVY):-0.47