Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1484
Number of amino acids:16
Molecular Weight:2027.13 Da
Theoretical pI:4.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)318.75%
Aspartic Acid ASP (D)212.5%
Glycine GLY (G)00%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)212.5%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)16.25%
Proline PRO (P)212.5%
Serine SER (S)212.5%
Arginine ARG (R)212.5%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)212.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC86
HydrogenH131
NitrogenN25
OxygenO32
SulphurS0

FormulaC86H131N25O32S0
Total Number of Atoms:274


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):5
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)    1.470
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 101.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.50, 25.00, 18.75]

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:0
Grand average of hydropathicity (GRAVY):-2.83