Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1458
Number of amino acids:19
Molecular Weight:2194.34 Da
Theoretical pI:3.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)210.53%
Aspartic Acid ASP (D)15.26%
Glycine GLY (G)15.26%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)15.26%
Asparagine ASN (N)210.53%
Glutamine GLN (Q)315.79%
Proline PRO (P)210.53%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)210.53%
Tryptophan TRP (W)00%
Valine VAL (V)315.79%
Tyrosine TYR (Y)210.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC96
HydrogenH144
NitrogenN24
OxygenO35
SulphurS0

FormulaC96H144N24O35S0
Total Number of Atoms:299


Total number of positively charged residues (ARG + LYS):0
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    2980
Absorption 0.1% (=1 g/l)    1.358
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 64.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.58, 26.32, 15.79]

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:66.3159
Grand average of hydropathicity (GRAVY):-1.01