Physicochemical Properties of Peptide



PPepDB ID:PPepDB_425
Number of amino acids:15
Molecular Weight:1988.33 Da
Theoretical pI:11.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)00%
Phynylalanine PHE (F)213.33%
Isoleucine ILE (I)16.67%
Histidine HIS (H)16.67%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)16.67%
Asparagine ASN (N)16.67%
Glutamine GLN (Q)00%
Proline PRO (P)213.33%
Serine SER (S)16.67%
Arginine ARG (R)320%
Threonine THR (T)00%
Tryptophan TRP (W)16.67%
Valine VAL (V)16.67%
Tyrosine TYR (Y)16.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC96
HydrogenH138
NitrogenN28
OxygenO19
SulphurS0

FormulaC96H138N28O19S0
Total Number of Atoms:281


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    3.516
Aromaticity:0.267

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[46.67, 26.67, 6.67]

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:71.3334
Grand average of hydropathicity (GRAVY):-0.55