Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3460
Number of amino acids:18
Molecular Weight:1809.18 Da
Theoretical pI:5.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)211.11%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)15.56%
Glycine GLY (G)211.11%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)211.11%
Histidine HIS (H)00%
Lysine LYS (K)15.56%
Methionine MET (M)00%
Leucine LEU (L)211.11%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)316.67%
Serine SER (S)15.56%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)316.67%
Tyrosine TYR (Y)15.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC86
HydrogenH141
NitrogenN19
OxygenO23
SulphurS0

FormulaC86H141N19O23S0
Total Number of Atoms:269


Total number of positively charged residues (ARG + LYS):1
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    1490
Absorption 0.1% (=1 g/l)    0.824
Aromaticity:0.056

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.44, 33.33, 22.22]

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:146.111
Grand average of hydropathicity (GRAVY):0.98