Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2081
Number of amino acids:20
Molecular Weight:2369.64 Da
Theoretical pI:4.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)15%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)210%
Aspartic Acid ASP (D)00%
Glycine GLY (G)210%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)15%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)15%
Leucine LEU (L)00%
Asparagine ASN (N)15%
Glutamine GLN (Q)15%
Proline PRO (P)210%
Serine SER (S)210%
Arginine ARG (R)15%
Threonine THR (T)00%
Tryptophan TRP (W)210%
Valine VAL (V)210%
Tyrosine TYR (Y)210%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC109
HydrogenH153
NitrogenN27
OxygenO31
SulphurS1

FormulaC109H153N27O31S1
Total Number of Atoms:321


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    5.900
Aromaticity:0.200

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.00, 35.00, 20.00]

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:53.5
Grand average of hydropathicity (GRAVY):-0.59